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Cubic Yard Calculator
Last updated: June 19, 2026
A cubic yard is a unit of volume equivalent to a cube with sides of one yard (three feet) in length. A cubic yard calculator determines the volume of material required for construction, landscaping, or earthmoving projects based on three-dimensional measurements. By entering the length, width, and depth in standard units, the calculator converts the dimensions and outputs the total volume in cubic yards. Builders, landscapers, and suppliers use this tool to estimate quantities of concrete, soil, mulch, and gravel.
Enter the area's length and width in feet and the depth in inches or feet, then pick a material. We compute the cubic yardage, cubic footage, and an honest weight estimate so you know exactly how much to order.
Quick Answer
Estimate the cubic yards of material needed for your project. Enter the length, width, and depth to calculate volume and weight.
Inches is typical for slabs, gravel, and landscape applications.
Material
Gravel · 2,700 lb/yd³
4.44 yd³
120 ft³ at 4 in deep
Add 5–10% to your order to cover settling, compaction, and edge spillage.
Examples
Driveway 30 × 12 ft × 4 in gravel
≈ 4.44 yd³ · 6.0 tons
Patio slab 20 × 12 ft × 5 in concrete
≈ 3.70 yd³ · 7.5 tons
Garden bed 25 × 8 ft × 3 in mulch
≈ 1.85 yd³ · 0.7 tons
Lawn topdress 40 × 25 ft × 1 in soil
≈ 3.09 yd³ · 3.4 tons
How it works
Cubic yards comes from length × width × depth in feet, divided by 27. Weight is the cubic-yard count times the material's density per cubic yard.
Volume · L × W × D ÷ 27 = yd³
Densities (lb/yd³): concrete ≈ 4,050 · gravel ≈ 2,700 · soil ≈ 2,200 · mulch ≈ 800
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Frequently asked questions
Multiply length × width × depth (in feet) to get cubic feet, then divide by 27. If your depth is in inches, divide that depth by 12 first to convert it to feet.
It depends on the material. Approximate weights per cubic yard: concrete ≈ 4,050 lb (2 tons), gravel ≈ 2,700 lb (1.35 tons), topsoil ≈ 2,200 lb (1.1 tons), mulch ≈ 800 lb (0.4 tons). The calculator multiplies by the right density when you pick a material.
Add 5–10% to cover settling, compaction, spillage, and over-pour at edges. For very small jobs, round up further to whole bags or to whatever the supplier delivers in.
Suppliers sell both ways. Truck deliveries are usually quoted in tons; bagged or scooped quantities in cubic yards. Use whichever the supplier asks for — the calculator gives you both.
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