Mass per volume density.
Pound per Cubic inches to Grains per Pint Converter — lb/in3 to gr/pt
Convert Pound per Cubic inch (lb/in3) to Grain per Pint (gr/pt) using the exact conversion factor (1 pound per cubic inch = 202,125 grain per pint). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Grains per Pint converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 27679.90471 / 0.1369444884.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Grains per Pint
Pound per Cubic inch and Grain per Pint both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Pound per Cubic inch is most often used for used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure.
Formula
grains per pint = pound per cubic inches × 202125
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 grain per pint equals 0.136944488362 base units, so dividing one by the other gives the direct pound per cubic inch-to-grain per pint factor of 202125.
Simple example
1 lb/in3 × 202125 = 202,125 gr/pt
1 pound per cubic inch = 202,125 grains per pint.
Real-world example
1,000 lb/in3 × 202125 = 202,125,000 gr/pt
1,000 pound per cubic inches = 202,125,000 grains per pint.
Conversion table
| Pound per Cubic inch (lb/in3) | Grain per Pint (gr/pt) |
|---|---|
| 0.1 lb/in3 | 20,212.5 gr/pt |
| 1 lb/in3 | 202,125 gr/pt |
| 10 lb/in3 | 2,021,250 gr/pt |
| 100 lb/in3 | 20,212,500 gr/pt |
| 1,000 lb/in3 | 202,125,000 gr/pt |
| 10,000 lb/in3 | 2,021,250,000 gr/pt |
Reverse conversion: Grain per Pint to Pound per Cubic inch
1 gr/pt × 0.000004947433519 = 0.0000049474 lb/in3
1 grain per pint = 0.0000049474 pound per cubic inches.
pound per cubic inches = grains per pint × 0.00000494743351886
For a page dedicated to this direction, see Grain per Pint to Pound per Cubic inch.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Understanding the Grain per Pint (gr/pt)
Mass per volume density.
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per pint are in 1 pound per cubic inch?
1 pound per cubic inch equals 202,125 grains per pint, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to grain per pint?
Multiply the pound per cubic inch value by 202125. The converter above does this instantly to whatever precision you set.
How do I convert grain per pint back to pound per cubic inch?
Use the reverse factor: 1 grain per pint equals 0.0000049474 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
What is a grain per pint?
Grain per Pint (gr/pt) is a unit of density.
Is the pound per cubic inch to grain per pint conversion exact?
Yes. Both pound per cubic inch and grain per pint are defined by fixed standards rather than physical artifacts, so the factor of 202125 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.