Cubic Feet to Pounds Calculator

Convert volume (ft³) to weight (lbs) using material density for accurate mass calculations

Volume to Mass Conversion Calculator

lb/ft³

Selected: Water(62.43 lb/ft³)

ft³

Volume of material in cubic feet

lbs

Weight of material in pounds

Conversion Results

0.000 ft³
Volume
0.00 lbs
Weight

Conversion Formula: Weight (lbs) = Volume (ft³) × Density (lb/ft³)

Calculation: 0.000 ft³ × 62.43 lb/ft³ = 0.00 lbs

Material: Water (62.43 lb/ft³)

Common Volume Conversions

Example Calculations

Converting 5 ft³ of Water to Pounds

Given: 5 cubic feet of water

Density of water: 62.43 lb/ft³

Formula: Weight = Volume × Density

Calculation: 5 ft³ × 62.43 lb/ft³ = 312.15 lbs

Result: 5 ft³ of water weighs 312.15 pounds

Converting 500 lbs of Concrete to ft³

Given: 500 pounds of concrete

Density of concrete: 149.83 lb/ft³

Formula: Volume = Weight ÷ Density

Calculation: 500 lbs ÷ 149.83 lb/ft³ = 3.34 ft³

Result: 500 lbs of concrete equals 3.34 cubic feet

Common Material Densities

Liquids

Water62.43 lb/ft³
Gasoline45.9 lb/ft³
Diesel53.1 lb/ft³

Construction

Concrete149.83 lb/ft³
Gravel105 lb/ft³
Sand (dry)94.58 lb/ft³

Metals

Steel490.1 lb/ft³
Aluminum168.5 lb/ft³
Gold1206 lb/ft³

Unit Information

Cubic Feet (ft³)

Unit of volume equal to a cube with 1-foot sides

Pounds (lbs)

Unit of weight/mass in the Imperial system

Density (lb/ft³)

Mass per unit volume, varies by material

Conversion Tips

Weight = Volume × Density

Volume = Weight ÷ Density

Density varies significantly by material

Used in construction, shipping, and engineering

Understanding Volume to Weight Conversion

Why Density Matters

Converting between volume (cubic feet) and weight (pounds) requires knowing the material's density. Different materials have vastly different densities - one cubic foot of gold weighs much more than one cubic foot of water or air.

Common Applications

  • Construction: Calculating material weights for structural loads
  • Shipping: Determining freight costs based on weight
  • Engineering: Stress analysis and load calculations
  • Manufacturing: Material quantity planning

Conversion Formulas

Weight = Volume × Density

Volume = Weight ÷ Density

Density Examples

  • Water: 62.43 lb/ft³ (reference standard)
  • Concrete: 149.83 lb/ft³ (heavy construction)
  • Steel: 490.1 lb/ft³ (very heavy metal)
  • Air: 0.08 lb/ft³ (very light gas)