Concrete Yard Calculator

The Complete Guide to Calculating Concrete Yards

Ordering the right amount of concrete is one of the most important steps in any construction project. Too little and you face a cold joint or an incomplete pour. Too much and you waste money on excess material. I built this calculator to help homeowners, contractors, and DIY builders estimate concrete quantities accurately before calling the ready-mix supplier or loading up on bags at the hardware store.

Understanding Cubic Yards

Concrete is sold and measured in cubic yards in the United States. One cubic yard equals 27 cubic feet, or a cube measuring 3 feet on each side. The term "yard" when used alone in concrete work always refers to a cubic yard, not a linear yard. When a contractor says "I need 5 yards," they mean 5 cubic yards of concrete.

The metric equivalent of a cubic yard is approximately 0.7646 cubic meters. In countries using the metric system, concrete is ordered in cubic meters. One cubic meter equals about 1.308 cubic yards. For international readers, this calculator provides results in cubic feet which can be converted to cubic meters by dividing by 35.315.

A cubic yard of standard concrete weighs approximately 4,050 pounds, or about 2 tons. This weight varies slightly depending on the aggregate used and the mix design. Lightweight concrete, which uses expanded shale or clay aggregates, weighs about 3,000 pounds per cubic yard. Heavyweight concrete, used for radiation shielding, can weigh over 6,000 pounds per cubic yard.

The Slab Calculation Formula

The basic formula for calculating concrete volume for a rectangular slab is length times width times thickness, with all measurements in the same unit. Since dimensions are typically given in feet and inches, and thickness in inches, the key conversion is dividing inches by 12 to get feet.

For example, a 20-foot by 20-foot patio that is 4 inches thick requires 20 x 20 x (4/12) = 133.33 cubic feet. Dividing by 27 gives 4.94 cubic yards. Adding a standard 10% waste factor brings the order to about 5.43 cubic yards. Most ready-mix companies deliver in quarter-yard increments, so you would order 5.5 cubic yards.

Footing and Wall Calculations

Footings are the below-grade concrete structures that support foundations, walls, and columns. Residential footings are typically 12 to 24 inches wide and 6 to 12 inches deep, with the exact dimensions specified by local building codes based on soil bearing capacity and structural loads.

The calculation for a continuous footing is the same rectangular formula applied to its cross-section and length. A footing that runs 80 linear feet, is 18 inches wide, and 10 inches deep requires 80 x (18/12) x (10/12) = 100 cubic feet, or 3.70 cubic yards. Perimeter footings for a typical house foundation might total 150 to 200 linear feet, requiring 6 to 12 cubic yards depending on dimensions.

Foundation walls are calculated similarly. A wall 8 inches thick, 4 feet tall, and 120 feet long requires 120 x (8/12) x 4 = 320 cubic feet, or 11.85 cubic yards. Foundation walls consume significant concrete volumes because of their height, and errors in estimation can be costly at $150 per yard.

Column and Pier Calculations

Round columns and piers require the cylinder volume formula, which uses pi times the radius squared times the height.

Sonotube forms (cardboard tubes used for round columns) come in standard diameters of 6, 8, 10, 12, 14, 16, 18, 20, 24, 30, 36, and 48 inches. Deck footings typically use 8 to 12 inch diameter tubes extending 42 to 48 inches below grade (depending on frost line depth). A deck with 16 piers, each 10 inches in diameter and 4 feet deep, needs about 3.5 cubic feet per pier, totaling 55.9 cubic feet or 2.07 cubic yards.

Step and Stair Calculations

Concrete steps are calculated as a series of stacked rectangles, where each step adds its own rise height to the total volume. The concrete beneath a set of stairs forms a triangular cross-section with a rectangular platform on top.

For a set of steps, the total volume equals the width times the sum of all step volumes. Each step contributes its run depth times the cumulative height at that step. The bottom step is the full height of all steps above it, and each subsequent step is one rise shorter.

Standard residential steps have a 7-inch rise and 11-inch run, following the building code requirement that two risers plus one tread should equal approximately 25 inches. Five steps at these dimensions with a 4-foot width require approximately 0.75 cubic yards before waste.

Waste Factors and Ordering Strategies

The 10% waste factor that this calculator applies by default accounts for several real-world conditions. Ground is never perfectly level, so the actual excavation depth varies across the site. Form boards may bow slightly under the weight of wet concrete, increasing the volume beyond the theoretical calculation. Concrete sticks to the inside of the truck chute, to wheelbarrows, and to tools. Some spillage during placement is inevitable.

For projects with well-prepared, level subgrade and precision-built forms, 5% waste may be sufficient. For projects on rough or sloped ground where the excavation depth varies by more than an inch across the site, 15 to 20% is more appropriate. I have worked on projects where the actual concrete used exceeded the calculated amount by 25% because the subgrade had significant low spots that were not visible until the pour began.

When ordering ready-mix concrete, round up to the nearest half-yard or quarter-yard. Most ready-mix companies charge a short-load fee for deliveries under a minimum volume, typically 3 to 5 yards. This fee can range from $25 to $75 per yard below the minimum. If your project needs only 2 cubic yards, the effective cost per yard is significantly higher due to this surcharge.

For very small projects under 1 cubic yard, pre-mixed bags are often more economical despite the higher per-yard material cost. An 80-pound bag of concrete mix yields about 0.6 cubic feet, costs roughly $5 to $7, and requires only water and a mixing container. For 0.5 cubic yards (13.5 cubic feet), you need about 23 bags of 80-pound mix, costing $115 to $161 for materials alone.

Concrete Mix Types and Strengths

Standard ready-mix concrete has a compressive strength of 3,000 to 4,000 PSI (pounds per square inch), suitable for most residential applications including driveways, patios, sidewalks, and foundations. High-strength mixes of 5,000 to 6,000 PSI are used for commercial construction, bridge decks, and structures subject to heavy loads.

The most common mix designation for residential work is a 5-sack mix, meaning 5 bags of Portland cement per cubic yard of concrete. This produces approximately 3,000 PSI strength at 28 days. A 6-sack mix produces about 4,000 PSI and is specified for driveways and garage floors that need to support vehicle weight.

Bagged concrete mix from hardware stores is typically a 4,000 PSI blend. Quikrete and Sakrete are the two dominant brands in the US market. Both offer standard mix, high-early-strength mix (which reaches working strength in one day instead of the usual seven), crack-resistant mix with fiber reinforcement, and fast-setting mix that hardens in 20 to 40 minutes.

Water-to-cement ratio is the single most important factor affecting concrete strength. The ideal ratio for standard concrete is between 0.40 and 0.50 by weight. Adding excess water to make the mix more workable (a common temptation on hot days or when the pour site is far from the truck) reduces strength significantly. A water-to-cement ratio of 0.60 can reduce 28-day strength by 20 to 30 percent compared to a 0.45 ratio.

Site Preparation for Concrete Pours

Proper site preparation directly affects the longevity and performance of concrete work. The subgrade (the soil beneath the concrete) should be compacted to at least 95% of its maximum dry density, verified with a proctor test for commercial work or a plate compactor for residential projects. Loose or organic soil must be removed and replaced with compactable fill.

A sub-base of compacted gravel, typically 4 to 6 inches of 3/4-inch crushed stone, provides drainage and a stable platform for the slab. Without a proper sub-base, water can accumulate beneath the slab, saturate the subgrade, and cause settlement or frost heave in cold climates.

Vapor barriers (typically 6-mil or 10-mil polyethylene sheeting) are required under slabs that will be enclosed in a building, such as basement floors and garage slabs. The barrier prevents ground moisture from migrating through the slab and causing problems with flooring, coatings, or indoor humidity. Some specifications call for a 2-inch sand layer over the vapor barrier to protect it from puncture during concrete placement.

Reinforcement typically consists of welded wire mesh (WWM) or rebar. For residential slabs, 6x6 W1.4xW1.4 welded wire mesh is standard. Driveways and garage floors may use #4 rebar on 18-inch centers in both directions. The reinforcement should be positioned at the mid-depth of the slab using chairs or supports, not placed on the ground and "pulled up" during the pour, which rarely achieves proper positioning.

Estimating for Irregular Shapes

Many concrete projects involve shapes that are not simple rectangles or cylinders. Curved patios, L-shaped foundations, and free-form pool decks require breaking the area into simpler geometric shapes, calculating each separately, and summing the results.

For a curved patio, approximate the shape as a series of rectangular sections and add the curved portions as partial circles. A semicircular extension with a 6-foot radius adds pi x 6^2 / 2 = 56.5 square feet to the slab area. At 4 inches thick, that is 56.5 x 0.333 = 18.8 cubic feet, or 0.70 cubic yards.

L-shaped and T-shaped slabs should be divided into their component rectangles, with each rectangle calculated independently. Be careful not to double-count the overlap area where rectangles intersect. Sketching the layout on graph paper and labeling dimensions before entering them into the calculator prevents errors.

For slabs on sloped ground where the thickness varies from one end to the other, calculate the average thickness. If the slab is 4 inches thick at one end and 8 inches thick at the other (following the slope), the average thickness is 6 inches. This gives a reasonable estimate, though the actual volume depends on whether the slope is linear, which it usually is for graded sites.

Temperature and Weather Considerations

Concrete curing is a chemical reaction (hydration) that is sensitive to temperature. The ideal curing temperature range is 50 to 75 degrees Fahrenheit (10 to 24 degrees Celsius). Below 50F, hydration slows dramatically, and below 40F, it can stop entirely. Frozen concrete can lose up to 50% of its potential strength permanently.

Hot weather (above 85F or 30C) accelerates hydration, which sounds beneficial but actually causes problems. Rapid hydration generates heat faster than it can dissipate, potentially causing thermal cracking. Hot, dry conditions also accelerate surface moisture evaporation, leading to plastic shrinkage cracking before the concrete sets. In hot weather, request the ready-mix company to add ice to the mix water and plan to pour in the early morning.

Rain during a pour is problematic because water falling on the surface dilutes the paste layer, weakening the top surface and potentially causing scaling (surface flaking). Light rain that evaporates quickly is usually not a concern for slabs that will be finished immediately. Heavy rain that adds standing water to the surface should prompt a delay in the pour if possible.

Wind accelerates surface evaporation and can cause plastic shrinkage cracking on exposed slabs. Windbreaks or evaporation retarder sprays can mitigate this risk. The rate of evaporation depends on air temperature, concrete temperature, relative humidity, and wind speed. When the evaporation rate exceeds 0.25 lb/ft2/hr, protective measures are recommended.

Cost Planning and Budgeting

The total cost of a concrete project includes more than just the material. Ready-mix concrete at $125 to $175 per yard is typically the largest single expense, but delivery fees, pumping costs, labor, forms, reinforcement, and finishing all add up.

Concrete pump trucks are needed when the truck cannot back up directly to the pour location. Line pumps cost $150 to $300 per hour, and boom pumps (for reaching over obstacles or to upper floors) cost $200 to $400 per hour. A residential driveway that requires 5 yards and one hour of pump time adds $200 to $400 to the project.

Form lumber (typically 2x4 or 2x6 boards) costs $5 to $10 per linear foot installed, including stakes and bracing. For a 20x20 slab, the perimeter is 80 linear feet of forms, costing $400 to $800. Forms can sometimes be reused on subsequent projects if removed carefully.

Professional concrete finishing for flatwork (slabs, driveways, patios) costs $3 to $8 per square foot for a broom finish and $6 to $15 per square foot for stamped or exposed aggregate finishes. A 400-square-foot patio with a broom finish costs $1,200 to $3,200 for labor alone.

For a complete 20x20 foot patio (4 inches thick, 4.94 cubic yards), a typical budget breakdown looks like this. Concrete at $150/yard is $741. Delivery and short-load fees add $50 to $100. Forms and reinforcement cost $400 to $600. Labor for preparation, pouring, and finishing runs $1,200 to $2,400. The total ranges from $2,400 to $3,800, or roughly $6 to $9.50 per square foot.

Curing and Finishing Timeline

Fresh concrete goes through several distinct phases after placement. The initial set occurs 45 to 90 minutes after mixing, when the surface begins to stiffen and can no longer be worked easily. Final set occurs 4 to 8 hours after mixing, when the concrete is hard enough to resist fingerprint indentation.

Concrete reaches approximately 70% of its design strength at 7 days and 99% at 28 days. The 28-day strength is the standard reference point for testing and specification compliance. However, concrete continues to gain strength slowly for years after placement, potentially reaching 10 to 20% above the 28-day value over the first year.

Proper curing requires maintaining moisture and temperature for at least 7 days after placement. Curing methods include ponding (flooding the surface with water), wet burlap covered with plastic sheeting, liquid membrane-forming curing compounds, and plastic sheeting alone. Neglecting curing can reduce final strength by 20 to 30% and increase surface cracking.

For residential driveways and garage floors, wait at least 7 days before walking on the surface and 28 days before driving vehicles on it. Heavy trucks should wait at least 90 days. These timelines assume normal curing temperatures. In cold weather, extend all timelines by 50 to 100%.

Reinforcement Options and When to Use Them

Concrete is extremely strong in compression (withstanding squeezing forces) but relatively weak in tension (resisting pulling or stretching forces). Reinforcement addresses this limitation by embedding steel within the concrete to handle tensile loads. The three main reinforcement options for residential and light commercial work are welded wire mesh, rebar, and fiber reinforcement.

Welded wire mesh (WWM) consists of steel wires welded together in a grid pattern. The most common residential specification is 6x6 W1.4/W1.4, meaning wires spaced 6 inches apart in both directions with a cross-sectional area of 0.014 square inches per wire. This mesh is sold in flat sheets (typically 5 x 10 feet) or rolls and costs about $0.15 to $0.25 per square foot. Mesh is appropriate for slabs on grade where the primary concern is controlling shrinkage cracking.

Rebar (reinforcing bar) provides significantly more tensile strength than wire mesh. Standard rebar sizes for residential work include #3 (3/8 inch diameter), #4 (1/2 inch), and #5 (5/8 inch). The most common residential specification for driveways is #4 rebar on 18-inch centers in both directions, placed on chairs at the mid-depth of the slab. Rebar is required for structural elements like footings, foundation walls, retaining walls, and any slab that spans over fill or supports loads beyond normal foot and vehicle traffic.

Fiber reinforcement uses short synthetic or steel fibers mixed directly into the concrete. Synthetic fibers (polypropylene or nylon) at a typical dosage of 1 to 2 pounds per cubic yard help control plastic shrinkage cracking during the initial curing period. Steel fibers at 25 to 60 pounds per cubic yard can provide structural reinforcement equivalent to light wire mesh. Fiber reinforcement adds $5 to $15 per cubic yard and eliminates the labor of placing and positioning mesh or rebar.

Common Concrete Problems and Prevention

Cracking is the most common concrete complaint, and some degree of cracking is inevitable in virtually every concrete installation. Concrete shrinks as it cures (losing water and chemical volume), and this shrinkage creates internal tensile stresses. When these stresses exceed the concrete's tensile strength, cracks form. Control joints (tooled or saw-cut grooves) create planned weak points where cracks are encouraged to form in straight lines rather than randomly across the surface.

Control joints should be placed at intervals no greater than two to three times the slab thickness in feet. For a 4-inch slab, joints should be spaced every 8 to 12 feet. For a 20 x 20 foot slab, this means cutting the slab into four roughly equal panels with joints at the 10-foot marks in both directions. Joints should be cut to a depth of at least one-quarter the slab thickness (1 inch for a 4-inch slab).

Scaling (surface flaking) results from freeze-thaw cycling, deicing salt exposure, or a weak surface layer caused by overworking or finishing too early. Air-entrained concrete, which contains billions of microscopic air bubbles, resists freeze-thaw damage because the bubbles provide space for ice crystal expansion. All exterior concrete in climates with freezing temperatures should use air-entrained mix with 5 to 7% air content.

Spalling (deeper surface deterioration) can result from rebar corrosion, alkali-silica reaction, or impact damage. Corroding rebar expands to several times its original volume, creating internal pressure that fractures the concrete cover. Maintaining at least 2 inches of clear cover (concrete thickness) over all reinforcement prevents moisture and deicing salts from reaching the steel and initiating corrosion.

Decorative Concrete Options

Stamped concrete replicates the appearance of brick, stone, slate, tile, and other materials at a fraction of the cost. The process involves pressing rubber mats (stamps) into freshly placed concrete that has been colored with integral color or dry-shake hardener. Stamped concrete costs $10 to $18 per square foot installed, compared to $15 to $30+ for natural stone. The concrete volume calculation is the same as for a standard slab, typically 4 inches thick.

Exposed aggregate finishes reveal the decorative stone within the concrete by washing away the surface paste before it fully hardens. This produces a durable, slip-resistant texture that works well for pool decks, walkways, and patios. The concrete mix for exposed aggregate uses specially selected decorative stone (typically 3/8 inch pea gravel in earth tones) and may cost $10 to $20 more per cubic yard than standard mix.

Colored concrete uses iron oxide pigments mixed into the concrete or applied as a surface hardener. Integral color (mixed throughout) provides consistent color even if the surface is chipped or worn, while dry-shake hardener (applied to the surface) provides more intense color and a harder wearing surface. Integral color adds $10 to $25 per cubic yard, while dry-shake hardener costs $0.30 to $0.60 per square foot.

Delivery and Placement Logistics

Ready-mix concrete trucks carry 8 to 11 cubic yards per load. The standard truck has a capacity of about 10 yards, though the actual capacity varies by company and truck configuration. For large pours requiring more than one truck, coordinate the delivery schedule so that each truck arrives before the previous load begins to set (typically within 45 to 90 minutes, depending on temperature and mix additives).

The maximum recommended time from mixing to placement is 90 minutes under normal conditions (60 to 80 degrees Fahrenheit). In hot weather above 85F, this window shortens to 60 minutes. Some admixtures (retarders) can extend the working time by 1 to 2 hours, which is useful for large pours or when the truck must travel a long distance. Request retarder from the ready-mix company when ordering for hot-weather pours or when delivery distance exceeds 30 minutes.

Access to the pour site determines whether you can pour directly from the truck chute (which extends about 12 to 18 feet from the truck), need a concrete pump ($200 to $400 per hour), or must use wheelbarrows (one cubic yard takes approximately 40 wheelbarrow loads using a standard 6-cubic-foot wheelbarrow). Plan the truck position and pour sequence before the truck arrives, as delays add $2 to $3 per minute in waiting fees after the first 5 to 10 free minutes.

Calculating Concrete for Driveways

Driveways are one of the most common residential concrete projects. A standard single-car driveway is 10 to 12 feet wide and 18 to 20 feet long (from the street to the garage). A two-car driveway is typically 20 to 24 feet wide. The recommended thickness for a residential driveway is 4 inches minimum, with 5 or 6 inches preferred for areas where heavy vehicles (trucks, RVs, or trailers) will park or drive.

For a single-car driveway measuring 12 x 20 feet at 4 inches thick, the calculation is 12 x 20 x (4/12) = 80 cubic feet / 27 = 2.96 cubic yards. With 10% waste, that becomes 3.26 cubic yards. Most concrete suppliers would round this to 3.5 yards for the order. At $150 per yard for ready-mix, the material cost is approximately $525.

Two-car driveways at 24 x 20 feet and 5 inches thick require 24 x 20 x (5/12) = 200 cubic feet / 27 = 7.41 cubic yards. With waste, roughly 8.15 yards or an order of 8.5 cubic yards at $150 per yard totals $1,275 in concrete material. Adding forms, reinforcement, labor, and finishing brings the total project cost to approximately $5,000 to $9,000 for a professional installation.

Driveway aprons (the section between the street and the sidewalk or property line) are typically poured separately from the main driveway and may be subject to municipal specifications. Many jurisdictions require 6-inch thickness for aprons because they span the gap between the street base and the driveway base, where settlement is more likely. Check with your local building department before pouring an apron.

Calculating Concrete for Sidewalks and Walkways

Residential sidewalks are typically 3 to 4 feet wide and 4 inches thick. Public sidewalks may be 5 feet wide per ADA requirements. A 50-foot walkway at 4 feet wide and 4 inches thick requires 50 x 4 x (4/12) = 66.67 cubic feet / 27 = 2.47 cubic yards. With waste, order approximately 2.75 cubic yards.

Walkways with curves or irregular shapes should be divided into straight segments and calculated separately. Add the results together and apply the waste factor to the total. For curved sections, calculate the average width (the width at the midpoint of the curve) and multiply by the curved length measured along the centerline.

Sidewalks require control joints every 4 to 5 feet (matching the width-based spacing rule of 2 to 3 times the thickness). A 50-foot sidewalk should have 10 to 12 joints. Expansion joints (using pre-formed compressible joint filler) should be placed where the sidewalk meets fixed structures like buildings, steps, or existing slabs. These joints allow the slab to expand and contract with temperature changes without cracking.

Understanding Concrete Mix Ratios

The classic concrete mix ratio by volume is 1 part cement to 2 parts sand to 3 parts coarse aggregate (gravel or crushed stone), often written as 1:2:3. Water is added at a ratio of approximately 0.5 parts by weight of cement. This produces a standard 3,000 PSI mix suitable for most residential applications.

For higher-strength mixes, the cement proportion increases. A 1:1.5:3 ratio produces approximately 4,000 PSI. A 1:1:2 ratio produces 5,000 PSI or higher. These rich mixes use more cement per cubic yard, increasing both cost and heat generation during curing. For most residential flatwork, the standard 1:2:3 mix or a commercial 5-sack mix (5 bags of cement per cubic yard) is appropriate.

The aggregate size affects both the finish quality and the structural performance. Standard mixes use 3/4-inch or 1-inch maximum aggregate. For thin sections under 3 inches, use 3/8-inch pea gravel to ensure proper fill around reinforcement. For exposed aggregate finishes, the aggregate selection is an aesthetic choice, with river rock, crushed granite, and colored gravel as popular options.

Admixtures modify concrete properties for specific applications. Water reducers improve workability without adding excess water. Accelerators speed up the set time for cold-weather pouring. Retarders slow the set time for hot weather or long transport distances. Air-entraining agents create microscopic air bubbles for freeze-thaw resistance. Fiber additions reduce plastic shrinkage cracking. Your ready-mix supplier can recommend appropriate admixtures based on your project conditions.

Permits and Building Code Requirements

Most jurisdictions require a building permit for concrete work that is structural (footings, foundations, retaining walls over 4 feet) or that encroaches on setback areas. Simple flatwork like patios and walkways that do not require footings may be exempt from permit requirements in many areas, but driveways that connect to public streets often require a permit and inspection because they affect drainage and right-of-way access.

Building codes specify minimum concrete strength, reinforcement requirements, footing depth (which must extend below the local frost line), and slab thickness for different applications. The International Residential Code (IRC) Section R403 specifies that footings must extend at least 12 inches below undisturbed ground surface, or to the frost line depth, whichever is greater. Frost line depths range from 0 inches in southern states to 60+ inches in northern Minnesota and Alaska.

Before pouring any concrete, call 811 (the national utility locator service) at least 48 hours in advance to have underground utilities marked. Digging into a gas line, water main, or buried electrical conduit can be deadly and carries significant legal liability. The 811 service is free and is required by law in all 50 states before any excavation.

Inspections are typically required at two stages for permitted work. The first inspection occurs after forms and reinforcement are in place but before concrete is poured. The inspector verifies footing dimensions, rebar placement, sub-base preparation, and form construction. The second inspection occurs after the concrete has cured, verifying the finished dimensions and surface quality. Schedule inspections well in advance, as a failed inspection can delay your pour by days and your ready-mix order may need to be rescheduled.

Concrete Removal and Replacement

Removing existing concrete adds significantly to project costs and volume calculations. Old concrete is typically broken up using a jackhammer (for small areas) or a hydraulic breaker attached to a skid steer or excavator (for large areas). Removal costs range from $2 to $6 per square foot depending on thickness, reinforcement, and access.

Disposal of broken concrete costs $25 to $50 per ton at most construction and demolition (C and D) recycling facilities. A 20 x 20 foot slab at 4 inches thick weighs approximately 10,000 pounds (5 tons), making disposal cost $125 to $250. Many C and D facilities accept clean concrete (no rebar, no wire mesh, no soil contamination) at lower rates because it can be crushed and recycled as road base or aggregate.

When replacing concrete, the new pour requires the same calculations as a new installation plus allowance for any depth variations left by the removal process. The subgrade after removal may be uneven, requiring more concrete than the nominal dimensions suggest. I recommend adding an extra 15% waste factor for replacement pours instead of the standard 10% to account for subgrade irregularities.

DIY vs. Professional Concrete Work

The decision to hire a concrete contractor or tackle the project yourself depends on the scope, your experience, and the complexity of the work. For small projects under 2 cubic yards (a small patio, a set of steps, or a few post footings), DIY is feasible for a reasonably handy homeowner willing to invest a full day of physical labor. For projects over 4 cubic yards or any structural work (foundations, retaining walls, load-bearing elements), hiring a professional is strongly recommended.

The tools needed for a DIY concrete project include a wheelbarrow, flat shovel, concrete rake, bull float, magnesium hand float, edger, groover (jointing tool), broom for texture, string line and stakes for layout, a level, and a concrete mixer or mixing tub for small batches. Renting a mixer costs $40 to $80 per day. For ready-mix delivery, you also need the physical ability to move and place the concrete quickly before it begins to set.

Professional concrete contractors charge $5 to $12 per square foot for standard flatwork including forms, placement, finishing, and curing. Complex work like stamped or colored concrete, improved structures, or structural elements costs more. Getting at least three quotes from licensed contractors and checking references and insurance before hiring is standard practice.

Regardless of whether you hire a contractor or do it yourself, understanding the volume calculations in this guide ensures you order the right amount of material. Nothing disrupts a concrete project more than running out mid-pour (creating a cold joint that weakens the structure) or having excess concrete delivered that must be disposed of at additional cost. Taking precise measurements and using the 10% waste factor will produce dependable estimates for projects of any size.