lb/gal to lb/ft³ Converter
Quick answer: To convert lb/gal to lb/ft³, multiply by 7.480519. For example, 10 lb/gal is 74.80519 lb/ft³. One pound per us gallon equals 7.480519 lb/ft³.
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Use the lb/gal to lb/ft³ Converter
lb/gal to lb/ft³ formula and what each symbol means
lb/ft³ = lb/gal × 7.480519
| Symbol | Meaning |
|---|---|
| lb/gal | Pound per US gallon |
| lb/ft³ | Pound per cubic foot |
lb/gal to lb/ft³ examples
1 lb/gal
1 lb/gal × 7.480519 = 7.480519 lb/ft³.
10 lb/gal
10 lb/gal × 7.480519 = 74.80519 lb/ft³.
100 lb/gal
100 lb/gal × 7.480519 = 748.0519 lb/ft³.
lb/gal compared with lb/ft³
One lb/gal is 7.481 times as large as one lb/ft³, so your number gets bigger when you convert lb/gal to lb/ft³ and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About lb/gal and lb/ft³
Pound per US gallon (lb/gal): Pounds per US gallon, about 119.83 kg/m³. Pound per cubic foot (lb/ft³): Imperial density unit, about 16.0185 kg/m³.
Where lb/gal to lb/ft³ 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/gal to lb/ft³ step by step
- Enter the value in lb/gal (the starting unit).
- Multiply by 7.480519, because 1 lb/gal = 7.480519 lb/ft³.
- The product is the value in lb/ft³. To go back, divide by 7.480519 or multiply by 0.1336806.
Popular density conversions
How to read your lb/gal to lb/ft³ result
Quick estimate: multiply by about 7.5 to get lb/ft³ from lb/gal; 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/GAL | LB/FT³ |
|---|---|
| 1 | 7.480519 |
| 2 | 14.96104 |
| 5 | 37.4026 |
| 10 | 74.80519 |
| 20 | 149.6104 |
| 50 | 374.026 |
| 100 | 748.0519 |
| 1,000 | 7,480.519 |
lb/ft³ to lb/gal: quick table
| LB/FT³ | LB/GAL |
|---|---|
| 1 | 0.1336806 |
| 5 | 0.6684028 |
| 10 | 1.336806 |
| 25 | 3.342014 |
| 50 | 6.684028 |
| 100 | 13.36806 |
| 250 | 33.42014 |
| 500 | 66.84028 |
Common mistakes when calculating lb/gal to lb/ft³
- Cubing the length factor incorrectly in imperial conversions.
- Dividing when you should multiply: from lb/gal to lb/ft³ multiply by 7.480519; from lb/ft³ to lb/gal divide by 7.480519.
lb/gal to lb/ft³ FAQ
How many lb/ft³ are in 1 lb/gal?
1 lb/gal equals 7.480519 lb/ft³.
How many lb/gal are in 1 lb/ft³?
1 lb/ft³ equals 0.1336806 lb/gal.
Is 1 lb/gal = 7.480519 lb/ft³ an exact conversion?
The factor is shown rounded to 7 significant figures (7.480519). The calculator above uses more digits.
What is a pound per US gallon (lb/gal)?
Pounds per US gallon, about 119.83 kg/m³.
How can I estimate lb/gal to lb/ft³ in my head?
Quick estimate: multiply by about 7.5 to get lb/ft³ from lb/gal; this is within 0.3% of the exact factor.
What is 3 lb/gal in lb/ft³?
3 lb/gal = 22.44156 lb/ft³ (since 3 × 7.480519).
What is 30 lb/gal in lb/ft³?
30 lb/gal = 224.4156 lb/ft³ (since 30 × 7.480519).
What is 150 lb/gal in lb/ft³?
150 lb/gal = 1,122.078 lb/ft³ (since 150 × 7.480519).
How many decimals should I keep when converting lb/gal to lb/ft³?
Match the precision of your original measurement. For example, 74.80519 lb/ft³ rounds to 74.8 lb/ft³ at 3 significant figures; keep more digits only for engineering or scientific work.
More in Density converters
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- lb/gal to g/cm³ Converter
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- lb/ft³ to lb/in³ Converter
- lb/in³ to lb/ft³ Converter
- lb/in³ to lb/gal 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