Cubic Feet To Pounds
Convert cubic feet to pounds for any material with this free online calculator. Select water concrete steel wood sand or enter custom density for accurate results.
About This Calculator
About Cubic Feet to Pounds Calculator
Our cubic feet to pounds calculator converts volume in cubic feet to weight in pounds for any material. Whether you are in construction estimating concrete weight, shipping calculating freight loads, or working on engineering projects, this tool helps you get accurate weight from volume measurements using material density.
The conversion uses the formula: Weight (lb) = Volume (ft³) × Density (lb/ft³). The calculator supports 27 common materials across metals steel aluminum copper lead gold silver mercury, non-metals concrete wood oak pine sand soil ice cork nylon plastics styrofoam diamond, liquids water seawater milk gasoline, and gases air helium natural gas. You can also enter a custom density for any material not in the list. For reverse conversion, enter weight in pounds to get the equivalent volume in cubic feet.
Material density is the mass per unit volume of a substance expressed in pounds per cubic foot. Different materials have vastly different densities — a cubic foot of styrofoam weighs only 1.5 pounds while the same volume of gold weighs over 1,200 pounds. Understanding these differences is essential for structural engineering, shipping logistics, material estimation, and scientific calculations.
How to Use
Select a material from the dropdown menu, then enter either the volume in cubic feet or the weight in pounds. Click Convert to get the result instantly. If you need a material not listed, choose Custom and enter the density in lb/ft³. The calculator works both ways — enter cubic feet to get pounds or enter pounds to get cubic feet.
Frequently Asked Questions
How many pounds are in a cubic foot?
The number of pounds in a cubic foot depends on the material. A cubic foot of water weighs 62.43 lb, concrete weighs 149.83 lb, steel weighs 490.1 lb, dry sand weighs about 94.58 lb, and wood typically weighs around 40 lb. Use our calculator to get precise results for any material.
How much does a cubic foot of water weigh?
A cubic foot of water weighs approximately 62.43 pounds or 28.32 kilograms. This can vary slightly with temperature and dissolved minerals. For example, a cubic foot of seawater weighs about 64.3 pounds due to dissolved salts.
How many pounds are 5 cubic feet of sand?
Five cubic feet of dry sand weighs approximately 473 pounds. The exact weight depends on the sand density, which ranges from 1.51 to 1.64 g/cm³, corresponding to 471-512 pounds for 5 cubic feet. Our calculator uses a standard dry sand density of 94.58 lb/ft³.
What materials are supported in the cubic feet to pounds calculator?
The calculator supports 27 materials including water, concrete, steel, aluminum, copper, lead, gold, silver, mercury, seawater, milk, gasoline, wood, oak, pine, dry sand, dry soil, ice, cork, nylon, plastics, styrofoam, diamond, air, helium, and natural gas. You can also enter a custom density for any other material.
How does cubic feet to pounds conversion work?
The conversion multiplies the volume in cubic feet by the material density in pounds per cubic foot (lb/ft³). The formula is: pounds = cubic feet × density. To convert pounds back to cubic feet, divide the weight by the density: cubic feet = pounds ÷ density.
Can I convert pounds to cubic feet?
Yes, the calculator works bidirectionally. Enter a weight in pounds and it will compute the equivalent volume in cubic feet using the selected material's density. You can fill either the cubic feet field or the pounds field to get the corresponding conversion.
What is the density of a cubic foot of concrete?
Standard concrete has a density of approximately 149.83 pounds per cubic foot (lb/ft³). This means a cubic foot of concrete weighs about 150 pounds. For lightweight concrete the density may be lower, around 90-110 lb/ft³, while high-strength concrete can exceed 150 lb/ft³.
Is this cubic feet to pounds tool free to use?
Yes, all calculators on Calculy are completely free to use with no registration or hidden fees. You can convert any volume to weight for any material instantly in your browser.