Cubic feet measure volume and pounds measure weight — converting between them depends on the material’s density, not a fixed ratio.
How it works
Multiplying cubic feet by the material’s density (in pounds per cubic foot) gives pounds. The default density is water’s.
What this does not include
This does not include a built-in density lookup for specific materials — check a reliable source or product label for the exact density of whatever material you’re measuring.
How to use this calculator
- Enter the cubic feet and the material’s density (defaults to water).
Frequently asked questions
How much does a cubic foot of water weigh?
About 62.4 pounds, the default result of this calculator.
Why is density given in pounds per cubic foot here instead of grams per milliliter?
Pounds per cubic foot is the conventional density unit for bulk construction and landscaping materials like gravel, mulch, and soil.
Is this the same method as the site’s gravel and mulch calculator?
Similar density-based approach, but this tool converts a known cubic-foot volume directly to weight, rather than starting from an area and depth.
