Mass per volume density.
Pounds per Cubic Meter to Grains per Imperial gallon Converter — lb/m3 to gr/imp gal
Convert Pound per Cubic Meter (lb/m3) to Grain per Imperial gallon (gr/imp gal) using the exact conversion factor (1 pound per cubic meter = 31.82263 grain per imperial gallon). See the formula, worked examples, and conversion table.
Pounds per Cubic Meter to Grains per Imperial gallon 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 0.45359237 / 0.01425376752.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic Meter to Grains per Imperial gallon
Pound per Cubic Meter and Grain per Imperial gallon 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. Both are mass per volume density units.
Formula
grains per imperial gallon = pounds per cubic meter × 31.82263
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic meter equals 0.45359237 base units, and 1 grain per imperial gallon equals 0.0142537675233 base units, so dividing one by the other gives the direct pound per cubic meter-to-grain per imperial gallon factor of 31.82263.
Simple example
1 lb/m3 × 31.82263 = 31.82263 gr/imp gal
1 pound per cubic meter = 31.82263 grains per imperial gallon.
Real-world example
1,000 lb/m3 × 31.82263 = 31,822.63 gr/imp gal
1,000 pounds per cubic meter = 31,822.63 grains per imperial gallon.
Conversion table
| Pound per Cubic Meter (lb/m3) | Grain per Imperial gallon (gr/imp gal) |
|---|---|
| 0.1 lb/m3 | 3.182263 gr/imp gal |
| 1 lb/m3 | 31.82263 gr/imp gal |
| 10 lb/m3 | 318.2263 gr/imp gal |
| 100 lb/m3 | 3,182.263 gr/imp gal |
| 1,000 lb/m3 | 31,822.63 gr/imp gal |
| 10,000 lb/m3 | 318,226.3 gr/imp gal |
Reverse conversion: Grain per Imperial gallon to Pound per Cubic Meter
31.82263 gr/imp gal × 0.03142417833 = 1 lb/m3
31.82263 grains per imperial gallon = 1 pounds per cubic meter.
pounds per cubic meter = grains per imperial gallon × 0.0314241783284
For a page dedicated to this direction, see Grain per Imperial gallon to Pound per Cubic Meter.
Understanding the Pound per Cubic Meter (lb/m3)
Mass per volume density.
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per imperial gallon are in 1 pound per cubic meter?
1 pound per cubic meter equals 31.82263 grains per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic meter to grain per imperial gallon?
Multiply the pound per cubic meter value by 31.82263. The converter above does this instantly to whatever precision you set.
How do I convert grain per imperial gallon back to pound per cubic meter?
Use the reverse factor: 1 grain per imperial gallon equals 0.0314241783 pounds per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic meter?
Pound per Cubic Meter (lb/m3) is a unit of density.
What is a grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
Is the pound per cubic meter to grain per imperial gallon conversion exact?
Yes. Both pound per cubic meter and grain per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 31.82263 used above is exact to as many digits as you choose to display.
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.