Cubic yards calculator converts a flat area plus depth into volume for ordering concrete, gravel, mulch, or fill.
About this calculator
Cubic yards calculator converts a flat area plus depth into volume for ordering concrete, gravel, mulch, or fill. Enter length and width in feet, depth in inches. You get cubic yards, cubic feet, and cubic metres.
US and UK suppliers quote in cubic yards; Indian ready-mix concrete (RMC) uses cubic metres. A 20 ft × 10 ft slab at 4 inches thick is about 2.47 cubic yards or 1.89 m³ — roughly 1.9 cubic metres of M20 concrete for a small patio.
Order 5–10% extra for spillage. Pair with [[gravel]] and [[concrete]] calculators. For tank storage see [[tank-volume]]. Construction teams in mixed units can cross-check [[length]] converter.
Common uses
- Homeowner ordering RMC for 20×10 ft patio slab in Gurgaon
- Landscaper calculating mulch volume for garden bed
- Contractor estimating fill dirt for driveway extension
- DIY pool deck concrete pour volume check
- Comparing US cubic yard quote to Indian m³ RMC order
Frequently asked questions
How many cubic yards in a 20 ft × 10 ft × 4 inch slab?
Volume = 20 × 10 × (4/12) = 66.67 ft³. Divide by 27 = 2.47 yd³ ≈ 1.89 m³. Enter 20, 10, 4 here to get exact figures.
How do I convert cubic yards to cubic metres for Indian RMC?
1 cubic yard ≈ 0.7646 m³. This calculator shows m³ directly. Tell the RMC plant you need 1.9 m³ of M20 — they dispatch by mixer truck capacity (typically 6–7 m³ per truck).
Why divide by 27 for cubic yards?
1 yard = 3 feet, so 1 cubic yard = 3×3×3 = 27 cubic feet. The formula converts depth from inches to feet first, multiplies dimensions, then divides by 27.
How much extra material should I order?
Add 5–10% for uneven depth, spillage, and waste. A 2.5 yd³ job should order about 2.7 yd³. Round up to the supplier