Cubic Feet to Pounds Calculator
Select a material, enter the volume in cubic feet, and instantly see the weight in pounds, kilograms, short tons and metric tons.
ft³
Material
Density used: 62.43 lb/ft³
- 1
Volume (ft³)
10 - 2
Density (lb/ft³)
62.43 - 3
Weight = Volume × Density
10 × 62.43 = 624.30
How does this calculator work?
Weight (lb) = cubic feet × density (lb/ft³). Common densities: water 62.43, concrete 150, sand 100, steel 490 lb/ft³. Select a material from the list (values are 2025 reference estimates — use Custom for precision work) or enter your own density.
Formula
How this is calculated
Converting volume to weight requires knowing the material's density — mass per unit volume. Multiplying cubic feet by the density in pounds per cubic foot gives the weight in pounds directly. The density values listed (2025 reference values) are typical bulk densities for each material: water is 62.43 lb/ft³ at room temperature, structural concrete is commonly 150 lb/ft³, dry sand around 100 lb/ft³, and steel 490 lb/ft³.
These are bulk (average) densities. Real-world materials vary with moisture content, compaction, mix design and temperature. Wet sand weighs about 20% more than dry sand; compacted soil can exceed 100 lb/ft³ while loose topsoil is closer to 75 lb/ft³. For precise engineering or shipping calculations, measure or source the actual density from a lab or material data sheet and enter it using the "Custom density" option.
Once the weight in pounds is known, kilograms follow by multiplying by 0.453592, short tons by dividing by 2000, and metric tons by dividing the kilogram value by 1000.
Frequently asked questions
One cubic foot of pure water weighs approximately 62.43 pounds (28.32 kg) at room temperature (20 °C). At 4 °C (maximum density) it is slightly higher at 62.43 lb/ft³.
Standard structural concrete weighs about 150 lb/ft³ (2400 kg/m³). Lightweight concrete can be as low as 105 lb/ft³. The exact weight depends on the aggregate and mix design.
Volume tells you how much space something occupies, but weight depends on how dense the material is. A cubic foot of steel weighs nearly 8 times as much as a cubic foot of water — volume alone cannot tell you the weight without the density.
Also known as
TG we-Calculate Editorial Team. (2026). Cubic Feet to Pounds Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/cubic-feet-to-pounds-calculator
TG we-Calculate Editorial Team. "Cubic Feet to Pounds Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/cubic-feet-to-pounds-calculator.
TG we-Calculate Editorial Team, "Cubic Feet to Pounds Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/cubic-feet-to-pounds-calculator
@misc{wecalculate_cubic_feet_to_pounds_calculator, title = {Cubic Feet to Pounds Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/cubic-feet-to-pounds-calculator}}, year = {2026}, note = {TG we-Calculate} }
Did this calculator help you?