Suppliers quote bulk materials in either tons or cubic yards — and they're not interchangeable without knowing the density. Ordering 10 tons of gravel gives you a very different volume than 10 tons of lava rock. This guide explains the conversion formula, shows worked examples for common construction materials, and links to the free converter tool.
The Conversion Formula
Cubic Yards = Tons ÷ Density (t/yd³)
— or —
Tons = Cubic Yards × Density (t/yd³)
The density (in tons per cubic yard) is the key variable. It varies significantly by material — from 0.35 t/yd³ for light wood mulch to 2.025 t/yd³ for asphalt or concrete.
Conversion Table by Material
| Material | Density (t/yd³) |
|---|---|
| Crushed Stone / Gravel | 1.4 |
| Pea Gravel | 1.35 |
| Bank Run / Dense Grade | 1.5 |
| Dry Sand | 1.35 |
| Wet Sand | 1.63 |
| Topsoil (dry) | 1.35 |
| Hot Mix Asphalt | 2.025 |
| Concrete | 2.025 |
| River Rock | 1.35 |
| Lava Rock | 0.65 |
| Wood Mulch | 0.35 |
Density values are typical dry bulk density ranges used by aggregate suppliers and construction estimators. Actual values vary by source, grain size, and moisture.
Why Density Matters
Consider two materials both ordered at 5 tons:
- • Lava rock (0.65 t/yd³): 5 ÷ 0.65 = 7.69 yd³
- • Asphalt (2.025 t/yd³): 5 ÷ 2.025 = 2.47 yd³
The same 5 tons covers more than 3× the volume in lava rock compared to asphalt. Using the wrong density in a conversion produces a completely wrong quantity — always match the density to your specific material.
Use the Free Material Weight Converter
Convert between tons, pounds, kilograms, cubic yards, and cubic feet for any material — instantly. Select your material type and the converter applies the correct bulk density automatically.
Open the Weight Converter →Quick Reference: Common Conversions
Frequently Asked Questions
How do I convert tons to cubic yards for gravel?
Divide the weight in tons by the material's density in tons per cubic yard. For standard crushed stone (1.40 t/yd³): 5 tons ÷ 1.40 = 3.57 cubic yards. Use the Weight Converter tool above to do this instantly for any material.
How many cubic yards in a ton of topsoil?
Dry topsoil weighs approximately 1.35 tons per cubic yard, so 1 ton of topsoil ≈ 0.74 cubic yards. For 5 tons: 5 ÷ 1.35 = 3.70 yd³. Note: wet topsoil is heavier (~1.5–1.7 t/yd³) and gives a lower cubic yard equivalent.
How many cubic yards in a ton of sand?
Dry sand: 1 ton ≈ 0.74 yd³ (density ≈ 1.35 t/yd³). Wet sand: 1 ton ≈ 0.61 yd³ (density ≈ 1.63 t/yd³). Always clarify with your supplier whether they quote by dry or wet weight.
How many cubic yards is 10 tons of gravel?
At 1.40 tons/yd³ (standard crushed stone): 10 ÷ 1.40 = 7.14 cubic yards. At 1.50 tons/yd³ (dense grade / bank run): 10 ÷ 1.50 = 6.67 cubic yards. Use the table on this page or the Weight Converter for other materials.
Why does the density matter when converting tons to cubic yards?
Because different materials weigh different amounts per cubic yard. A cubic yard of lava rock (0.65 t/yd³) weighs less than half a cubic yard of asphalt (2.025 t/yd³). Without knowing the density, converting between weight and volume gives the wrong answer. Always use the material-specific density for conversions.
How do I convert cubic yards to tons?
Multiply cubic yards by the material's bulk density in tons per cubic yard. For example, 5 yd³ of asphalt × 2.025 t/yd³ = 10.125 tons. The conversion is bidirectional — divide to go from tons to yd³, multiply to go from yd³ to tons.
Related Calculators
- → Weight Converter — convert any unit for any material
- → Gravel Calculator — cubic yards and tons from dimensions
- → Topsoil Calculator — topsoil volume and weight
- → Asphalt Calculator — asphalt tonnage from dimensions
- → Sand Calculator — dry and wet sand weight estimates
How This Estimate Was Prepared
All conversions on this page use the formula: cubic yards = tons ÷ density (t/yd³). Density values represent typical dry bulk density ranges compiled from common supplier and industry estimating references. Actual density varies by material source, moisture content, and grain size. For weight-sensitive orders, always request the specific density from your supplier and use their figure in place of the reference values shown here. Last reviewed: May 2026.
Disclaimer: Density values are typical dry bulk density ranges used by suppliers and estimators. Actual values vary by material source, grain size, and moisture. Always confirm density with your supplier for weight-sensitive orders.