Convert Pounds per cubic foot to Pounds per gallon
Instantly convert Pounds per cubic foot (lb/ft³) to Pounds per gallon (lb/gal) with our free online calculator.
Formula: lb/ft³ to lb/gal — multiply by 0.133681
Reference Table
| Pounds per cubic foot (lb/ft³) | Pounds per gallon (lb/gal) |
|---|---|
| 1 | 0.133681 |
| 5 | 0.668407 |
| 10 | 1.33681 |
| 25 | 3.34203 |
| 50 | 6.68407 |
| 100 | 13.3681 |
How to Convert Pounds per cubic foot to Pounds per gallon
Formula
To convert Pounds per cubic foot (lb/ft³) to Pounds per gallon (lb/gal): multiply by 0.133681
Step-by-Step
- Start with your value in Pounds per cubic foot (lb/ft³).
- Multiply by 0.133681 to perform the conversion.
- The result is your value expressed in Pounds per gallon (lb/gal).
Conversion Factor
1 lb/ft³ = 0.133681 lb/gal
Reverse Factor
1 lb/gal = 7.48048 lb/ft³
Worked Example
Convert 25 Pounds per cubic foot to Pounds per gallon: 25 lb/ft³ = 3.34203 lb/gal
About Pound per cubic foot (lb/ft³)
An imperial density unit (lbm/ft³, sometimes #/ft³) dominant in US construction, civil engineering, and oil-and-gas industries. Reference values: fresh water at 60 °F is 62.37 lb/ft³ (commonly rounded to 62.4 for engineering), sea water 64.0 lb/ft³, normal-weight concrete 150 lb/ft³ (ACI 318 default), lightweight structural concrete 105-125 lb/ft³, structural steel 490 lb/ft³, asphalt pavement 140-150 lb/ft³, lumber framing (SPF dimensional) 30-35 lb/ft³, fiberglass batt insulation 0.5-2.0 lb/ft³. Lb/ft³ appears explicitly in ASCE 7 dead-load tables (the US loading code), US residential plumbing water-hammer calculations, mineral-wool / fiberglass insulation product spec sheets, drilling-fluid specs (mud weight quoted as ppg = lb/gal but pressure-gradient math uses lb/ft³), and HVAC duct-design air-density corrections for altitude. Convert lb/ft³ to kg/m³ by multiplying by 16.018; to g/cm³ by multiplying by 0.01602.
About Pound per gallon (lb/gal)
A liquid-density unit (lb per US gallon, abbreviated lb/gal or ppg in oilfield jargon) heavily used in US industry. Reference values: fresh water at 60 °F is 8.345 lb/gal (the universal calibration baseline), sea water ~8.55 lb/gal, gasoline ~6.15 lb/gal, kerosene/Jet A 6.5-6.8 lb/gal, diesel 6.9-7.1 lb/gal, milk ~8.6 lb/gal. The dominant industrial use is drilling-mud density in oil and gas operations: API RP 13B and the IADC mud-handling tables specify mud weight in ppg, and the hydrostatic-pressure formula in psi/ft is mud weight × 0.052 directly. Drillers chase a mud weight just heavy enough to control pore pressure but not heavy enough to fracture the formation (the 'mud window'). Lb/gal also appears in paints/coatings (VOC compliance reporting), industrial cleaners, and beer/wort specific-gravity work (homebrew + craft-brewing). Convert: 1 lb/gal = 119.83 kg/m³ = 0.1198 g/mL.
Quick Facts
- 1 Pound per cubic foot equals 0.133681 Pounds per gallon
- 1 Pound per gallon equals 7.48048 Pounds per cubic foot
- Pound per cubic foot is a unit of density
- Pound per gallon is a unit of density
- This conversion is commonly used in material science, fluid mechanics, and quality control
- The Pound per cubic foot belongs to the imperial system
Common Pound per cubic foot to Pound per gallon Conversions
| Pounds per cubic foot (lb/ft³) | Pounds per gallon (lb/gal) |
|---|---|
| 0.01 | 0.00133681 |
| 0.1 | 0.0133681 |
| 0.25 | 0.0334203 |
| 0.5 | 0.0668407 |
| 1 | 0.133681 |
| 2 | 0.267363 |
| 3 | 0.401044 |
| 5 | 0.668407 |
| 10 | 1.33681 |
| 15 | 2.00522 |
| 20 | 2.67363 |
| 25 | 3.34203 |
| 50 | 6.68407 |
| 75 | 10.0261 |
| 100 | 13.3681 |
| 250 | 33.4203 |
| 500 | 66.8407 |
| 1000 | 133.681 |
| 5000 | 668.407 |
| 10000 | 1336.81 |
Understanding Pounds per cubic foot
The Pound per cubic foot (symbol: lb/ft³) is a unit of density. An imperial density unit (lbm/ft³, sometimes #/ft³) dominant in US construction, civil engineering, and oil-and-gas industries. Reference values: fresh water at 60 °F is 62.37 lb/ft³ (commonly rounded to 62.4 for engineering), sea water 64.0 lb/ft³, normal-weight concrete 150 lb/ft³ (ACI 318 default), lightweight structural concrete 105-125 lb/ft³, structural steel 490 lb/ft³, asphalt pavement 140-150 lb/ft³, lumber framing (SPF dimensional) 30-35 lb/ft³, fiberglass batt insulation 0.5-2.0 lb/ft³. Lb/ft³ appears explicitly in ASCE 7 dead-load tables (the US loading code), US residential plumbing water-hammer calculations, mineral-wool / fiberglass insulation product spec sheets, drilling-fluid specs (mud weight quoted as ppg = lb/gal but pressure-gradient math uses lb/ft³), and HVAC duct-design air-density corrections for altitude. Convert lb/ft³ to kg/m³ by multiplying by 16.018; to g/cm³ by multiplying by 0.01602.
It belongs to the imperial measurement system.
Pounds per cubic foot are commonly used in material science, fluid mechanics, and quality control.
Understanding Pounds per gallon
The Pound per gallon (symbol: lb/gal) is a unit of density. A liquid-density unit (lb per US gallon, abbreviated lb/gal or ppg in oilfield jargon) heavily used in US industry. Reference values: fresh water at 60 °F is 8.345 lb/gal (the universal calibration baseline), sea water ~8.55 lb/gal, gasoline ~6.15 lb/gal, kerosene/Jet A 6.5-6.8 lb/gal, diesel 6.9-7.1 lb/gal, milk ~8.6 lb/gal. The dominant industrial use is drilling-mud density in oil and gas operations: API RP 13B and the IADC mud-handling tables specify mud weight in ppg, and the hydrostatic-pressure formula in psi/ft is mud weight × 0.052 directly. Drillers chase a mud weight just heavy enough to control pore pressure but not heavy enough to fracture the formation (the 'mud window'). Lb/gal also appears in paints/coatings (VOC compliance reporting), industrial cleaners, and beer/wort specific-gravity work (homebrew + craft-brewing). Convert: 1 lb/gal = 119.83 kg/m³ = 0.1198 g/mL.
It belongs to the imperial measurement system.
Pounds per gallon are commonly used in material science, fluid mechanics, and quality control.
Why Convert Pounds per cubic foot to Pounds per gallon?
Converting between Pounds per cubic foot and Pounds per gallon is a frequent requirement for engineers, scientists, and students working with density values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate density conversion is essential.
Frequently Asked Questions
How do I convert Pounds per cubic foot to Pounds per gallon?
An imperial density unit (lbm/ft³, sometimes #/ft³) dominant in US construction, civil engineering, and oil-and-gas industries. To convert Pounds per cubic foot to Pounds per gallon, multiply by 0.133681. For example, 25 lb/ft³ equals 3.34203 lb/gal.
How many Pounds per gallon are in 1 Pound per cubic foot?
There are 0.133681 Pounds per gallon in 1 Pound per cubic foot.
How many Pounds per cubic foot are in 1 Pound per gallon?
There are 7.48048 Pounds per cubic foot in 1 Pound per gallon.
What is the formula for Pound per cubic foot to Pound per gallon conversion?
The formula is: multiply by 0.133681. This means 1 lb/ft³ = 0.133681 lb/gal.
Is a Pound per cubic foot bigger than a Pound per gallon?
Yes. One Pound per cubic foot is larger than one Pound per gallon because 1 lb/ft³ equals 0.133681 lb/gal, which is less than 1.
When do you need to convert between Pounds per cubic foot and Pounds per gallon?
A liquid-density unit (lb per US gallon, abbreviated lb/gal or ppg in oilfield jargon) heavily used in US industry. Pound per cubic foot and Pound per gallon are both density units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.