lb-in3 to g-cm3 | Exact Decimal + Formula

1 Pound / Cubic Inch = 27.6799 Gram / Cubic Centimeter

One pound / cubic inch equals about 27.7 grams / cubic centimeter (exactly 27.6799 g/cm³). Real-world use: metals and alloys in US engineering specifications. This page expresses those values in grams / cubic centimeter, which is used for minerals, metals, and scientific density tables. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Pound / Cubic Inch and Gram / Cubic Centimeter

Pound / Cubic Inch (lb/in³)

Pounds per cubic inch is used for dense materials; steel is about 0.284 lb/in³.

Where it's used: Metals and alloys in US engineering specifications.

Gram / Cubic Centimeter (g/cm³)

Grams per cubic centimeter equals 1,000 kg/m³; water is exactly 1 g/cm³ at 4°C.

Where it's used: Minerals, metals, and scientific density tables.

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Precision

Formula

g/cm³ = lb/in³ × 27.6799

To convert Pound / Cubic Inch to Gram / Cubic Centimeter, use the formula displayed above.

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Pound / Cubic Inch to Gram / Cubic Centimeter: Quick Reference Table

Pound / Cubic Inch	Gram / Cubic Centimeter (Decimal)	Fraction	Real-world equivalent
0.001 lb/in³	0.02768 g/cm³	-	fractional unit measurement
0.01 lb/in³	0.276799 g/cm³	-	fractional unit measurement
0.1 lb/in³	2.76799 g/cm³	-	standard single unit scale
0.5 lb/in³	13.83995 g/cm³	-	multiple unit increments
1 lb/in³	27.6799 g/cm³	-	multiple unit increments
2 lb/in³	55.3598 g/cm³	-	multiple unit increments
5 lb/in³	138.3995 g/cm³	-	multiple unit increments
10 lb/in³	276.799 g/cm³	-	multiple unit increments
25 lb/in³	691.9975 g/cm³	-	multiple unit increments
50 lb/in³	1383.995 g/cm³	-	multiple unit increments
100 lb/in³	2767.99 g/cm³	-	multiple unit increments
250 lb/in³	6919.975 g/cm³	-	multiple unit increments
500 lb/in³	13839.95 g/cm³	-	multiple unit increments
1000 lb/in³	27679.9 g/cm³	-	multiple unit increments

lb/in³ to g/cm³ Formula and Examples

Direct Formula g/cm³ = lb/in³ × 27.6799

Inverse Formula lb/in³ = g/cm³ × 0.036127

Mental Math Shortcut

Multiply the value by roughly 27.7 to calculate the equivalent amount in your head.

Common Pound / Cubic Inch to Gram / Cubic Centimeter Calculations

5 lb/in³ = 138.3995 g/cm³
10 lb/in³ = 276.799 g/cm³
50 lb/in³ = 1383.995 g/cm³
100 lb/in³ = 2767.99 g/cm³
500 lb/in³ = 13839.95 g/cm³

Precision & Practical Use

For example, 10 lb/in³ = 276.799 g/cm³ — roughly multiple unit increments.

Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most density applications, 2–3 significant figures are plenty.

Related Specialist Density Calculators & Niche Tools

Density (mass per unit volume) is a critical property in brewing, winemaking, chemistry, and material science. Converting density metrics helps track material purity and fermentation progress.

In brewing and viticulture, liquid density is measured in Specific Gravity (SG) or degrees Brix to calculate sugar content and potential alcohol. Laboratory technicians convert solute concentration densities using ppm/mgL calculators. Our density tools automate the non-linear conversions between refractive indexes and relative density values, giving brewers and lab scientists instant, error-free results.

Brix to Specific Gravity Convert sugar concentrations. Specific Gravity Calc Convert specific gravity to density. Concentration ppm/mgL Convert solution concentrations.

How to Convert Pound / Cubic Inch to Gram / Cubic Centimeter

How many gram / cubic centimeters are in one pound / cubic inch?

One Pound / Cubic Inch (lb/in³) equals 27.6799 Gram / Cubic Centimeter (g/cm³). To convert pound / cubic inches to gram / cubic centimeters, multiply the pound / cubic inch value by 27.6799.

How do I convert Pound / Cubic Inch to Gram / Cubic Centimeter?

Multiply your pound / cubic inch value by 27.6799 to get the result in Gram / Cubic Centimeter: g/cm³ = lb/in³ × 27.6799. For example, 5 lb/in³ = 138.3995 g/cm³.

What is the formula for converting lb/in³ to g/cm³?

The conversion formula is g/cm³ = lb/in³ × 27.6799. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for lb/in³ to g/cm³?