Free Cubic Feet to Tons Calculator - Bulk Material Weight
Convert cubic feet of gravel, sand, soil, concrete, and other bulk materials into metric tons and US short tons using density.
Formula & Methodology
The calculator converts the entered cubic feet volume into cubic meters, applies the stored density for the selected material to determine the mass in kilograms, and then converts that mass into metric tonnes and US short tons.
- Cubic Meters = Cubic Feet × 0.028316846592
- Density (kg/m³) = Density (kg/L) × 1,000
- Kilograms = Cubic Meters × Density (kg/m³)
- Metric Tonnes = Kilograms ÷ 1,000
- US Short Tons = Kilograms ÷ 907.18474
Worked Example
Using the Cubic Feet to Tons Calculator: apply the formula above to your input values. For instance, Cubic Meters = Cubic Feet × 0.028316846592, then Density (kg/m³) = Density (kg/L) × 1,000. The tool performs each step instantly and shows the result.
Frequently Asked Questions
How many tons are in a cubic foot?
It depends on the material. A cubic foot of gravel weighs about 0.05 US tons, while denser materials like concrete weigh more. Density determines the exact figure.
How do I convert cubic feet to tons?
Convert cubic feet to cubic meters, multiply by the material density in kg/m³ to get kilograms, then divide by 1,000 for metric tons or 907.18 for US tons.
Why do gravel and sand weigh differently?
They have different bulk densities — sand packs tighter and is heavier per cubic foot than loose gravel or mulch.
Should I add extra for compaction?
Bulk densities assume loose material. Compacted material weighs more per cubic foot, so add a margin for compacted deliveries.
Can I enter a custom material?
Yes. Choose "Custom Density" and enter your value in kg/L, kg/m³, or lb/ft³ for materials not in the list.
Is this useful for construction estimates?
Yes. Contractors use cubic-feet-to-tons conversions to order the right tonnage of aggregate, sand, and soil and to plan haulage.