How do I convert lb/ft³ to lb/gal (US)?
For this pair, use value × 0.133680555556. A quick benchmark is 15 lb/ft³ = 2.005208 lb/gal (US), which can help you check whether the result is in the expected range.
Convert Pound per cubic foot (lb/ft³) to Pound per gallon (US) (lb/gal (US)) instantly.
Calculation
value × 0.133680555556
| Quick Conversion | Converted |
|---|---|
| 0.001 lb/ft³ | 0.000134 lb/gal (US) |
| 1 lb/ft³ | 0.133681 lb/gal (US) |
| 100 lb/ft³ | 13.368056 lb/gal (US) |
| 997 lb/ft³ | 133.279514 lb/gal (US) |
| 1,000 lb/ft³ | 133.680556 lb/gal (US) |
Pound per cubic foot (lb/ft³) is the starting unit on this page for a density conversion.
Pound per cubic foot is part of the measurement language used in Pound per cubic foot appears in measurement references where lb/ft³ is the expected label.
lb/ft³ values are converted when working with values that are already written in lb/ft³ but the final answer needs to be shown in a different unit.
Pound per gallon (US) (lb/gal (US)) is the result unit produced by this lb/ft³ to lb/gal (US) conversion.
Pound per gallon (US) remains common in Pound per gallon (US) appears in measurement references where lb/gal (US) is the expected label.
lb/gal (US) results are useful for working with values that are already written in lb/gal (US), especially when converted densities are used in lab reports, material comparisons, fluid calculations, and engineering references.
Mathematically, pound per gallon (us) (lb/gal (US)) = pound per cubic foot (lb/ft³) converted with the formula below.
1 lb/ft³ = 0.133681 lb/gal (US)
1 lb/gal (US) = 7.480519 lb/ft³
Formula: value × 0.133680555556
Example: 15 lb/ft³ = 2.005208 lb/gal (US)
Precision note: Keep enough decimal places to support your actual use. Keep both parts of the density unit together; converting only the mass or volume part will produce the wrong density.
1 lb/ft³ = 0.133681 lb/gal (US)
1 lb/gal (US) = 7.480519 lb/ft³
| Pound per cubic foot [lb/ft³] | Pound per gallon (US) [lb/gal (US)] |
|---|---|
| 0.01 lb/ft³ | 0.001337 lb/gal (US) |
| 0.1 lb/ft³ | 0.013368 lb/gal (US) |
| 1 lb/ft³ | 0.133681 lb/gal (US) |
| 2 lb/ft³ | 0.267361 lb/gal (US) |
| 5 lb/ft³ | 0.668403 lb/gal (US) |
| 10 lb/ft³ | 1.336806 lb/gal (US) |
| 20 lb/ft³ | 2.673611 lb/gal (US) |
| 50 lb/ft³ | 6.684028 lb/gal (US) |
| 100 lb/ft³ | 13.368056 lb/gal (US) |
Rounding depends on what the converted value is for. A casual estimate can be rounded for readability, while values used for fluid calculations and lab notes or material property tables may need more decimal places.
A common mistake is forgetting that 1 g/cm³, 1 g/mL, and 1000 kg/m³ describe the same density. For this pair, Keep the lb/ft³ label attached to the number so the value is not misread Keep the lb/gal (US) label attached to the number so the value is not misread
When reading the result in lb/gal (US), remember that keep the lb/gal (us) label attached to the number so the value is not misread. If another source gives a different lb/gal (US) value, compare the number of decimal places first. If the difference is large, check the starting value, selected units, and direction.
For this pair, use value × 0.133680555556. A quick benchmark is 15 lb/ft³ = 2.005208 lb/gal (US), which can help you check whether the result is in the expected range.
It is the reverse direction. This page starts with lb/ft³ and returns lb/gal (US); the reverse starts with lb/gal (US) and returns lb/ft³.
Because Pound per gallon (US) is the larger unit in this pair, the converted number is smaller than the starting lb/ft³ value. The relationship is 1 lb/ft³ = 0.133681 lb/gal (US).