Lb per cubic foot to lb per gallon converter
Convert lb per cubic foot (lb/ft³) to lb per gallon (lb/US gal). Calculate a value, check the formula and compare common measurements.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same density quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the density measurement guide · Calculation checks, sources and review limits
How do I convert lb per cubic foot to lb per gallon?
Enter the value in lb per cubic foot to find the same density quantity in lb per gallon. The number changes to match the unit; the underlying quantity stays the same. Check the definitions below when a unit has more than one convention.
Common uses
- Compare density values on material data sheets.
- Express a known density in the unit needed for a calculation.
How it works
For the displayed direction, 1 lb/ft³ equals 0.133680555556 lb/US gal. The engine converts through the shared density base quantity. Use consistent physical definitions; conversion changes the unit, not the measured quantity. The multiplier is derived from the two centralized unit factors. Keep full precision until the final result; displayed answers use up to 12 significant digits.
Worked example
10 lb/ft³ converts to 1.33680555556 lb/US gal. For the reverse direction, swap the units and enter 1.33680555556 lb/US gal; the result is approximately 10 lb/ft³.
FAQ
How do I convert lb/ft³ to lb/US gal?
lb/US gal = lb/ft³ × 0.133680555556
Which definition is used?
The centralized unit definitions in our unit library are used.
Common values
Use “Swap units” above for the reverse conversion. Values below are rounded to six significant digits.
| lb per cubic foot | lb per gallon |
|---|---|
| 1 | 0.133681 |
| 5 | 0.668403 |
| 10 | 1.33681 |
| 20 | 2.67361 |
| 30 | 4.01042 |
| 50 | 6.68403 |
| 100 | 13.3681 |