Convert Pounds per cubic inch to Pounds per cubic foot
Instantly convert Pounds per cubic inch (lb/in³) to Pounds per cubic foot (lb/ft³) with our free online calculator.
Formula: lb/in³ to lb/ft³ — multiply by 1728
Reference Table
| Pounds per cubic inch (lb/in³) | Pounds per cubic foot (lb/ft³) |
|---|---|
| 1 | 1728 |
| 5 | 8639.98 |
| 10 | 17280 |
| 25 | 43199.9 |
| 50 | 86399.8 |
| 100 | 172800 |
How to Convert Pounds per cubic inch to Pounds per cubic foot
Formula
To convert Pounds per cubic inch (lb/in³) to Pounds per cubic foot (lb/ft³): multiply by 1728
Step-by-Step
- Start with your value in Pounds per cubic inch (lb/in³).
- Multiply by 1728 to perform the conversion.
- The result is your value expressed in Pounds per cubic foot (lb/ft³).
Conversion Factor
1 lb/in³ = 1728 lb/ft³
Reverse Factor
1 lb/ft³ = 0.000578705 lb/in³
Worked Example
Convert 25 Pounds per cubic inch to Pounds per cubic foot: 25 lb/in³ = 43199.9 lb/ft³
About Pound per cubic inch (lb/in³)
An imperial density unit for small, high-density objects — dense metals, ammunition projectiles, precision-machined components, dense polymers, and radiation-shielding materials. Reference values per ASM Handbook and MMPDS: lead 0.4097 lb/in³, copper 0.3237, brass C260 0.308, bronze 0.318, gold 0.698 (one of the highest among engineering metals), tungsten 0.697, mild steel 0.2836, stainless 304 0.286, stainless 316 0.290, Inconel 718 0.297, titanium Ti-6Al-4V 0.160, aluminum 6061 0.0975, magnesium AZ31B 0.0639. Lb/in³ appears on US ammunition specification sheets (where bullet mass is mass-per-grain but stock-material density is lb/in³), precision-machining engineering drawings and CAM software (Mastercam, Fusion 360 with imperial-unit projects), legacy US aerospace stress reports (especially structural mass-properties tables in SwRI / NASA reports), military armor-design specifications (RHA equivalency calcs), and dense-shielding calculations for medical and industrial radiation work (depleted uranium 0.685 lb/in³, lead-glass shielding 0.21 lb/in³). Metric conversion: 1 lb/in³ ≈ 27,679.9 kg/m³ ≈ 27.68 g/cm³ — a useful 27.68 multiplier for shop conversions.
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.
Quick Facts
- 1 Pound per cubic inch equals 1728 Pounds per cubic foot
- 1 Pound per cubic foot equals 0.000578705 Pounds per cubic inch
- Pound per cubic inch is a unit of density
- Pound per cubic foot is a unit of density
- This conversion is commonly used in material science, fluid mechanics, and quality control
- The Pound per cubic inch belongs to the imperial system
Common Pound per cubic inch to Pound per cubic foot Conversions
| Pounds per cubic inch (lb/in³) | Pounds per cubic foot (lb/ft³) |
|---|---|
| 0.01 | 17.28 |
| 0.1 | 172.8 |
| 0.25 | 431.999 |
| 0.5 | 863.998 |
| 1 | 1728 |
| 2 | 3455.99 |
| 3 | 5183.99 |
| 5 | 8639.98 |
| 10 | 17280 |
| 15 | 25919.9 |
| 20 | 34559.9 |
| 25 | 43199.9 |
| 50 | 86399.8 |
| 75 | 129600 |
| 100 | 172800 |
| 250 | 431999 |
| 500 | 863998 |
| 1000 | 1728000 |
| 5000 | 8639980 |
| 10000 | 17280000 |
Understanding Pounds per cubic inch
The Pound per cubic inch (symbol: lb/in³) is a unit of density. An imperial density unit for small, high-density objects — dense metals, ammunition projectiles, precision-machined components, dense polymers, and radiation-shielding materials. Reference values per ASM Handbook and MMPDS: lead 0.4097 lb/in³, copper 0.3237, brass C260 0.308, bronze 0.318, gold 0.698 (one of the highest among engineering metals), tungsten 0.697, mild steel 0.2836, stainless 304 0.286, stainless 316 0.290, Inconel 718 0.297, titanium Ti-6Al-4V 0.160, aluminum 6061 0.0975, magnesium AZ31B 0.0639. Lb/in³ appears on US ammunition specification sheets (where bullet mass is mass-per-grain but stock-material density is lb/in³), precision-machining engineering drawings and CAM software (Mastercam, Fusion 360 with imperial-unit projects), legacy US aerospace stress reports (especially structural mass-properties tables in SwRI / NASA reports), military armor-design specifications (RHA equivalency calcs), and dense-shielding calculations for medical and industrial radiation work (depleted uranium 0.685 lb/in³, lead-glass shielding 0.21 lb/in³). Metric conversion: 1 lb/in³ ≈ 27,679.9 kg/m³ ≈ 27.68 g/cm³ — a useful 27.68 multiplier for shop conversions.
It belongs to the imperial measurement system.
Pounds per cubic inch are commonly used in material science, fluid mechanics, and quality control.
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.
Why Convert Pounds per cubic inch to Pounds per cubic foot?
Converting between Pounds per cubic inch and Pounds per cubic foot 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 inch to Pounds per cubic foot?
An imperial density unit for small, high-density objects — dense metals, ammunition projectiles, precision-machined components, dense polymers, and radiation-shielding materials. To convert Pounds per cubic inch to Pounds per cubic foot, multiply by 1728. For example, 25 lb/in³ equals 43199.9 lb/ft³.
How many Pounds per cubic foot are in 1 Pound per cubic inch?
There are 1728 Pounds per cubic foot in 1 Pound per cubic inch.
How many Pounds per cubic inch are in 1 Pound per cubic foot?
There are 0.000578705 Pounds per cubic inch in 1 Pound per cubic foot.
What is the formula for Pound per cubic inch to Pound per cubic foot conversion?
The formula is: multiply by 1728. This means 1 lb/in³ = 1728 lb/ft³.
Is a Pound per cubic inch bigger than a Pound per cubic foot?
No. One Pound per cubic inch is smaller than one Pound per cubic foot because 1 lb/in³ equals 1728 lb/ft³, which is greater than 1.
When do you need to convert between Pounds per cubic inch and Pounds per cubic foot?
An imperial density unit (lbm/ft³, sometimes #/ft³) dominant in US construction, civil engineering, and oil-and-gas industries. Pound per cubic inch and Pound per cubic foot 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.