lb/ft³ to lb/gal Converter
Quick answer: To convert lb/ft³ to lb/gal, multiply by 0.1336806. For example, 10 lb/ft³ is 1.336806 lb/gal. One pound per cubic foot equals 0.1336806 lb/gal.
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Use the lb/ft³ to lb/gal Converter
lb/ft³ to lb/gal formula and what each symbol means
lb/gal = lb/ft³ × 0.1336806
| Symbol | Meaning |
|---|---|
| lb/ft³ | Pound per cubic foot |
| lb/gal | Pound per US gallon |
lb/ft³ to lb/gal examples
1 lb/ft³
1 lb/ft³ × 0.1336806 = 0.1336806 lb/gal.
10 lb/ft³
10 lb/ft³ × 0.1336806 = 1.336806 lb/gal.
100 lb/ft³
100 lb/ft³ × 0.1336806 = 13.36806 lb/gal.
lb/ft³ compared with lb/gal
One lb/gal is 7.481 times as large as one lb/ft³, so your number gets smaller when you convert lb/ft³ to lb/gal and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About lb/ft³ and lb/gal
Pound per cubic foot (lb/ft³): Imperial density unit, about 16.0185 kg/m³. Pound per US gallon (lb/gal): Pounds per US gallon, about 119.83 kg/m³.
Where lb/ft³ to lb/gal conversions are used
Lab work often reports g/cm³ or kg/L, which are numerically equal. Materials, liquids and fuels are compared by density in kg/m³, g/cm³ or lb/ft³.
How to calculate lb/ft³ to lb/gal step by step
- Enter the value in lb/ft³ (the starting unit).
- Multiply by 0.1336806, because 1 lb/ft³ = 0.1336806 lb/gal.
- The product is the value in lb/gal. To go back, divide by 0.1336806 or multiply by 7.480519.
Popular density conversions
How to read your lb/ft³ to lb/gal result
Quick estimate: multiply by about 0.134 to get lb/gal from lb/ft³; this is within 0.3% of the exact factor. Water at about 4 °C has a density of roughly 1,000 kg/m³, which is 1 g/cm³ or 1 kg/L.
| LB/FT³ | LB/GAL |
|---|---|
| 1 | 0.1336806 |
| 2 | 0.2673611 |
| 5 | 0.6684028 |
| 10 | 1.336806 |
| 20 | 2.673611 |
| 50 | 6.684028 |
| 100 | 13.36806 |
| 1,000 | 133.6806 |
lb/gal to lb/ft³: quick table
| LB/GAL | LB/FT³ |
|---|---|
| 1 | 7.480519 |
| 5 | 37.4026 |
| 10 | 74.80519 |
| 25 | 187.013 |
| 50 | 374.026 |
| 100 | 748.0519 |
| 250 | 1,870.13 |
| 500 | 3,740.26 |
Common mistakes when calculating lb/ft³ to lb/gal
- Cubing the length factor incorrectly in imperial conversions.
- Dividing when you should multiply: from lb/ft³ to lb/gal multiply by 0.1336806; from lb/gal to lb/ft³ divide by 0.1336806.
lb/ft³ to lb/gal FAQ
How many lb/gal are in 1 lb/ft³?
1 lb/ft³ equals 0.1336806 lb/gal.
How many lb/ft³ are in 1 lb/gal?
1 lb/gal equals 7.480519 lb/ft³.
Is 1 lb/ft³ = 0.1336806 lb/gal an exact conversion?
The factor is shown rounded to 7 significant figures (0.1336806). The calculator above uses more digits.
What is a pound per cubic foot (lb/ft³)?
Imperial density unit, about 16.0185 kg/m³.
How can I estimate lb/ft³ to lb/gal in my head?
Quick estimate: multiply by about 0.134 to get lb/gal from lb/ft³; this is within 0.3% of the exact factor.
What is 250 lb/ft³ in lb/gal?
250 lb/ft³ = 33.42014 lb/gal (since 250 × 0.1336806).
What is 7 lb/ft³ in lb/gal?
7 lb/ft³ = 0.9357639 lb/gal (since 7 × 0.1336806).
What is 40 lb/ft³ in lb/gal?
40 lb/ft³ = 5.347222 lb/gal (since 40 × 0.1336806).
How many decimals should I keep when converting lb/ft³ to lb/gal?
Match the precision of your original measurement. For example, 1.336806 lb/gal rounds to 1.34 lb/gal at 3 significant figures; keep more digits only for engineering or scientific work.
More in Density converters
- lb/gal to kg/L Converter
- lb/ft³ to g/cm³ Converter
- lb/gal to kg/m³ Converter
- kg/m³ to lb/in³ Converter
- kg/m³ to lb/gal Converter
- lb/gal to lb/in³ Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors