How Much Does a Yard of Concrete Cover? Coverage by Thickness
Understand the direct mathematical relationship between slab thickness and square footage coverage per cubic yard, including quick reference tables for 1 to 10 yards.
1 Cubic Yard covers 81 square feet at 4 inches thick.
Coverage is inversely proportional to thickness. At 6 inches thick (driveways and garage floors), 1 cubic yard covers 54 square feet. At 3 inches thick, it covers 108 square feet.
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Why Concrete Coverage Changes With Thickness
A cubic yard is a unit of volume equal to a 3-dimensional cube measuring 3 feet wide, 3 feet long, and 3 feet deep:
When you pour that 27 cubic feet of wet concrete into a slab form, the surface area it spreads across is governed by the depth of the forms:
This is why 1 cubic yard does not cover a fixed square footage. Slicing the volume into a thinner layer spreads it across a larger area, while pouring a deeper foundation concentrates the volume into a smaller footprint. For per-unit area requirements, check our guide on concrete required per square foot.
1 Cubic Yard Concrete Coverage by Slab Thickness
This verified reference table details exactly how many square feet 1 cubic yard covers across standard residential and commercial pour thicknesses:
| Slab Thickness | Thickness in Feet | Square Feet Covered per Yard | Equivalent Square Slab | Typical Project Application |
|---|---|---|---|---|
| 2 inches (50 mm) | 0.167 ft | 162.0 sq. ft. | 12.7 × 12.7 ft | Surface toppings, bonded overlays & leveling caps |
| 3 inches (75 mm) | 0.250 ft | 108.0 sq. ft. | 10.4 × 10.4 ft | Garden pathways, stepping stones & mower borders |
| 3.5 inches (90 mm) | 0.292 ft | 92.6 sq. ft. | 9.6 × 9.6 ft | Actual milled 2×4 lumber formwork pour |
| 4 inches (100 mm) | 0.333 ft | 81.0 sq. ft. | 9.0 × 9.0 ft | Standard residential patios, sidewalks, shed pads |
| 5 inches (125 mm) | 0.417 ft | 64.8 sq. ft. | 8.05 × 8.05 ft | Residential driveways (SUVs/pickups) & hot tub pads |
| 6 inches (150 mm) | 0.500 ft | 54.0 sq. ft. | 7.35 × 7.35 ft | Commercial driveways, garage floors, RV parking |
| 8 inches (200 mm) | 0.667 ft | 40.5 sq. ft. | 6.36 × 6.36 ft | Heavy machinery pads & reinforced foundation slabs |
| 10 inches (250 mm) | 0.833 ft | 32.4 sq. ft. | 5.69 × 5.69 ft | Industrial grade slabs & heavy load transfer pads |
| 12 inches (300 mm) | 1.000 ft | 27.0 sq. ft. | 5.20 × 5.20 ft | Continuous structural wall footings & grade beams |
To choose the right depth for your specific subgrade and load requirements, review our comprehensive guide on how thick should a concrete slab be.
Multi-Yard Concrete Coverage Table (1 to 10 Cubic Yards)
When placing an order with a local ready-mix supplier, use this cumulative square footage chart across the most common flatwork depths:
| Cubic Yards (yd³) | Total Volume (ft³) | Coverage @ 3" Depth | Coverage @ 4" Depth | Coverage @ 5" Depth | Coverage @ 6" Depth |
|---|---|---|---|---|---|
| 0.50 yd³ | 13.5 ft³ | 54.0 sq. ft. | 40.5 sq. ft. | 32.4 sq. ft. | 27.0 sq. ft. |
| 1.00 yd³ | 27.0 ft³ | 108.0 sq. ft. | 81.0 sq. ft. | 64.8 sq. ft. | 54.0 sq. ft. |
| 2.00 yd³ | 54.0 ft³ | 216.0 sq. ft. | 162.0 sq. ft. | 129.6 sq. ft. | 108.0 sq. ft. |
| 3.00 yd³ | 81.0 ft³ | 324.0 sq. ft. | 243.0 sq. ft. | 194.4 sq. ft. | 162.0 sq. ft. |
| 4.00 yd³ | 108.0 ft³ | 432.0 sq. ft. | 324.0 sq. ft. | 259.2 sq. ft. | 216.0 sq. ft. |
| 5.00 yd³ | 135.0 ft³ | 540.0 sq. ft. | 405.0 sq. ft. | 324.0 sq. ft. | 270.0 sq. ft. |
| 6.00 yd³ | 162.0 ft³ | 648.0 sq. ft. | 486.0 sq. ft. | 388.8 sq. ft. | 324.0 sq. ft. |
| 8.00 yd³ | 216.0 ft³ | 864.0 sq. ft. | 648.0 sq. ft. | 518.4 sq. ft. | 432.0 sq. ft. |
| 10.00 yd³ (Full Truck) | 270.0 ft³ | 1,080.0 sq. ft. | 810.0 sq. ft. | 648.0 sq. ft. | 540.0 sq. ft. |
* Nominal mathematical coverage. When placing your order, always factor in a 10% safety buffer (order 10% more yardage than theoretical coverage) to account for subgrade settlement and form expansion.
Frequently Asked Questions
How many square feet does 1 cubic yard of concrete cover at 4 inches thick?
At a standard 4-inch slab thickness, 1 cubic yard of concrete covers exactly 81 square feet (27 cu. ft. ÷ (4/12 ft) = 81 sq. ft., or 324 ÷ 4 = 81). This is equivalent to a slab measuring 9 ft × 9 ft.
How many square feet does 1 yard of concrete cover at 6 inches thick?
At 6 inches thick (typical for heavy-duty driveways, garage slabs, and RV parking pads), 1 cubic yard of concrete covers exactly 54 square feet (324 ÷ 6 = 54 sq. ft.). This represents an area of roughly 7.35 ft × 7.35 ft.
What is the formula to find square foot coverage from cubic yards?
The contractor formula is: Coverage in Square Feet = (324 × Cubic Yards) ÷ Thickness in Inches. For example, 3 cubic yards at 4 inches thick covers (324 × 3) ÷ 4 = 972 ÷ 4 = 243 square feet.
Does 1 cubic yard cover a fixed number of square feet?
No. A cubic yard is a measure of three-dimensional volume (27 cubic feet), not surface area. The square footage it covers depends entirely on how thick you pour the slab. A 2-inch pour covers 162 square feet per yard, while an 8-inch pour covers only 40.5 square feet per yard.
How many cubic yards do I need for 500 square feet?
For 500 square feet at 4 inches thick, nominal volume is (500 × 4) ÷ 324 = 6.17 cubic yards. Adding a standard 10% safety buffer yields 6.79 cubic yards (order 7.0 yards from the batch plant).