Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Pounds per cubic foot to Pounds per US gallon
Convert lb/ft³ to lb/gal instantly, then review the formula, assumptions, and rounding guidance.
DensityInstant result
Decimals
Formula result = input × 16.01846337 ÷ 119.8264273. 1 lb/ft³ = 0.1337 lb/gal
Common examples
One value, several units
Kilograms per cubic metre16.0185 kg/m³
Grams per cubic centimetre0.016 g/cm³
Kilograms per litre0.016 kg/L
Pounds per US gallon0.1337 lb/gal
Conversion table
| lb/ft³ | lb/gal |
|---|---|
| 1 lb/ft³ | 0.1337 lb/gal |
| 2 lb/ft³ | 0.2674 lb/gal |
| 5 lb/ft³ | 0.6684 lb/gal |
| 10 lb/ft³ | 1.3368 lb/gal |
| 25 lb/ft³ | 3.342 lb/gal |
| 50 lb/ft³ | 6.684 lb/gal |
| 100 lb/ft³ | 13.3681 lb/gal |
Conversion chart
1 lb/ft³0.1337 lb/gal
5 lb/ft³0.6684 lb/gal
10 lb/ft³1.3368 lb/gal
25 lb/ft³3.342 lb/gal
50 lb/ft³6.684 lb/gal
Worked example
Water is approximately 1,000 kg/m³.
Unit definition
Pounds per cubic foot (lb/ft³) One pounds per cubic foot equals 16.01846337 kilogram per cubic metre.
Unit history
Pounds per cubic foot is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert lb/ft³ to kilogram per cubic metre.
3. Convert the base value to lb/gal and apply your display precision.
Understand the result before using it
Pounds per cubic foot to Pounds per US gallon converts a value measured in Pounds per cubic foot (lb/ft³) into the equivalent value in Pounds per US gallon (lb/gal). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 16.01846337 ÷ 119.8264273
Assumptions
- Pounds per cubic foot and Pounds per US gallon represent the same density quantity.
- The input is expressed in lb/ft³; the output is expressed in lb/gal.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 lb/ft³ = 0.133680555541 lb/gal. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a lb/ft³ measurement in a document that expects lb/gal.
- Compare a pounds per cubic foot value with a value reported in pounds per us gallon.
- Check the lb/ft³-to-lb/gal arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- A material's density can change with temperature, pressure, composition, and moisture content.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Pounds per cubic foot to Pounds per US gallon?
result = input × 16.01846337 ÷ 119.8264273 Using the displayed relationship, 1 lb/ft³ equals 0.133680555541 lb/gal.
How many Pounds per US gallon are in one Pounds per cubic foot?
One Pounds per cubic foot is 0.133680555541 Pounds per US gallon. The displayed digits may be rounded.
Can I reverse the lb/ft³ to lb/gal conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts lb/gal back to lb/ft³.
Is the Pounds per cubic foot to Pounds per US gallon result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.