Mass per volume density.
Ounces per Cubic foot to Pounds per Cup Converter — oz/ft3 to lb/cup
Convert Ounce per Cubic foot (oz/ft3) to Pound per Cup (lb/cup) using the exact conversion factor (1 ounce per cubic foot = 0.0005221897 pound per cup). See the formula, worked examples, and conversion table.
Ounces per Cubic foot to Pounds per Cup converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 1.001153961 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Cubic foot to Pounds per Cup
Ounce per Cubic foot and Pound per Cup both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
pounds per cup = ounces per cubic foot × 0.000522189670139
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cubic foot equals 1.00115396087 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct ounce per cubic foot-to-pound per cup factor of 0.000522189670139.
Simple example
1 oz/ft3 × 0.0005221896701 = 0.0005221897 lb/cup
1 ounce per cubic foot = 0.0005221897 pounds per cup.
Real-world example
1,000 oz/ft3 × 0.0005221896701 = 0.5221896701 lb/cup
1,000 ounces per cubic foot = 0.5221896701 pounds per cup.
Conversion table
| Ounce per Cubic foot (oz/ft3) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 oz/ft3 | 0.000052219 lb/cup |
| 1 oz/ft3 | 0.0005221897 lb/cup |
| 10 oz/ft3 | 0.0052218967 lb/cup |
| 100 oz/ft3 | 0.052218967 lb/cup |
| 1,000 oz/ft3 | 0.5221896701 lb/cup |
| 10,000 oz/ft3 | 5.221896701 lb/cup |
Reverse conversion: Pound per Cup to Ounce per Cubic foot
0.0005221897 lb/cup × 1915.012987 = 1.000000057 oz/ft3
0.0005221897 pounds per cup = 1.000000057 ounces per cubic foot.
ounces per cubic foot = pounds per cup × 1915.01298701
For a page dedicated to this direction, see Pound per Cup to Ounce per Cubic foot.
Understanding the Ounce per Cubic foot (oz/ft3)
Mass per volume density.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cup are in 1 ounce per cubic foot?
1 ounce per cubic foot equals 0.0005221897 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic foot to pound per cup?
Multiply the ounce per cubic foot value by 0.0005221896701. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to ounce per cubic foot?
Use the reverse factor: 1 pound per cup equals 1,915.012987 ounces per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cubic foot?
Ounce per Cubic foot (oz/ft3) is a unit of density.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the ounce per cubic foot to pound per cup conversion exact?
Yes. Both ounce per cubic foot and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0005221896701 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.