How to use the square yards to cubic yards calculator
- 1
Enter the square yards
Type the area in square yards. If you have square feet, divide by 9 to get square yards, or use the square feet tool instead.
- 2
Set the depth
Enter the material thickness and pick the depth unit, which can be inches, feet, yards, centimeters, or meters.
- 3
Add quantity or waste
Use the optional fields to combine identical areas or add a waste allowance.
- 4
Read the cubic yards
The result shows cubic yards alongside cubic feet and cubic meters.
Formula
Cubic yards = square yards x depth (in) / 36
One square yard is 9 square feet, and a cubic yard is 27 cubic feet, so the depth in inches divides by 36 (27 times 12 divided by 9). When the depth is already in yards, cubic yards is simply square yards times depth in yards.
Choosing the right form
Use the version that matches your depth unit.
- Depth in inches
- Cubic yards = square yards x depth (in) / 36
- Depth in yards
- Cubic yards = square yards x depth (yd)
- When everything is in yards, area times depth is already a cubic-yard volume.
Worked example
A 100 square yard area is covered 6 inches deep.
- 1Multiply the area by the depth in inches: 100 x 6 = 600.
- 2Divide by 36: 600 / 36 = 16.67 cubic yards.
100 square yards at 6 inches deep needs about 16.67 cubic yards.
Area versus volume
A square yard is a flat patch that is one yard by one yard. A cubic yard is a solid block that is one yard in every direction. Going from the flat patch to the solid block requires a third measurement, the depth, which is why this tool always asks for it.
If your numbers are in feet rather than yards, the square feet to cubic yards calculator may be a better fit.
Where square yards show up
Some surfaces are commonly measured in square yards, including:
- Turf and sod areas
- Large graded or paved surfaces
- Sports and recreation surfaces
- Sitework where plans are drawn in yards
Square yards versus cubic yards
Keep the two units distinct:
- A square yard measures area and is 9 square feet
- A cubic yard measures volume and is 27 cubic feet
- You can only convert between them with a depth
Common mistakes
Watch for these errors:
- Treating square yards as if they were already cubic yards
- Confusing square yards with square feet, which are nine times smaller
- Forgetting to convert the depth into the right unit
- Rounding too early instead of at the final step
Square Yards to Cubic Yards by Depth
Cubic yards for each square-yard area and depth. Values are generated from square yards times depth in inches divided by 36.
| Area | 1 in | 2 in | 3 in | 4 in | 6 in | 12 in |
|---|---|---|---|---|---|---|
| 10 sq yd | 0.278 | 0.556 | 0.833 | 1.11 | 1.67 | 3.33 |
| 25 sq yd | 0.694 | 1.39 | 2.08 | 2.78 | 4.17 | 8.33 |
| 50 sq yd | 1.39 | 2.78 | 4.17 | 5.56 | 8.33 | 16.67 |
| 75 sq yd | 2.08 | 4.17 | 6.25 | 8.33 | 12.5 | 25 |
| 100 sq yd | 2.78 | 5.56 | 8.33 | 11.11 | 16.67 | 33.33 |
| 200 sq yd | 5.56 | 11.11 | 16.67 | 22.22 | 33.33 | 66.67 |
| 500 sq yd | 13.89 | 27.78 | 41.67 | 55.56 | 83.33 | 166.7 |
Frequently asked questions
- How do you convert square yards to cubic yards?
- Multiply the square yards by the depth in inches and divide by 36. If the depth is in yards, simply multiply square yards by depth in yards.
- Why divide by 36?
- A cubic yard is 27 cubic feet and a square yard is 9 square feet. Combining the unit factors, 27 times 12 inches divided by 9 equals 36.
- How many square feet are in a square yard?
- There are 9 square feet in one square yard.
- Can I convert square yards to cubic yards without a depth?
- No. Square yards measure area, so you must include a depth before you can find a volume.
- How many cubic yards is 100 square yards at 4 inches?
- 100 times 4 divided by 36 equals about 11.11 cubic yards.
- What if my depth is one full yard?
- Then the area in square yards equals the volume in cubic yards, because area times a one yard depth gives cubic yards directly.
- Should I add extra for waste?
- Many projects do. Use the waste field to add a percentage that fits your material and method, and confirm the final amount with your supplier.
Results use the exact factors of 9 square feet per square yard and 27 cubic feet per cubic yard. Table values are generated by the calculation engine. See the YardCalc calculation methodology.
Results are planning estimates. Last reviewed 2026-06-16.