Mass per volume density.
Grains per Gallon to Grains per Oil barrel Converter — gr/gal to gr/bbl
Convert Grain per Gallon (gr/gal) to Grain per Oil barrel (gr/bbl) using the exact conversion factor (1 grain per gallon = 42 grain per oil barrel). See the formula, worked examples, and conversion table.
Grains per Gallon to Grains per Oil barrel 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 0.01711806105 / 0.000407572882.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Gallon to Grains per Oil barrel
Grain per Gallon and Grain per Oil barrel 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 oil barrel = grains per gallon × 42
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per gallon equals 0.0171180610453 base units, and 1 grain per oil barrel equals 0.00040757288203 base units, so dividing one by the other gives the direct grain per gallon-to-grain per oil barrel factor of 42.
Simple example
1 gr/gal × 42 = 42 gr/bbl
1 grain per gallon = 42 grains per oil barrel.
Real-world example
1,000 gr/gal × 42 = 42,000 gr/bbl
1,000 grains per gallon = 42,000 grains per oil barrel.
Conversion table
| Grain per Gallon (gr/gal) | Grain per Oil barrel (gr/bbl) |
|---|---|
| 0.1 gr/gal | 4.2 gr/bbl |
| 1 gr/gal | 42 gr/bbl |
| 10 gr/gal | 420 gr/bbl |
| 100 gr/gal | 4,200 gr/bbl |
| 1,000 gr/gal | 42,000 gr/bbl |
| 10,000 gr/gal | 420,000 gr/bbl |
Reverse conversion: Grain per Oil barrel to Grain per Gallon
42 gr/bbl × 0.02380952381 = 1 gr/gal
42 grains per oil barrel = 1 grain per gallon.
grains per gallon = grains per oil barrel × 0.0238095238095
For a page dedicated to this direction, see Grain per Oil barrel to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Understanding the Grain per Oil barrel (gr/bbl)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per oil barrel are in 1 grain per gallon?
1 grain per gallon equals 42 grains per oil barrel, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to grain per oil barrel?
Multiply the grain per gallon value by 42. The converter above does this instantly to whatever precision you set.
How do I convert grain per oil barrel back to grain per gallon?
Use the reverse factor: 1 grain per oil barrel equals 0.0238095238 grains per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
What is a grain per oil barrel?
Grain per Oil barrel (gr/bbl) is a unit of density.
Is the grain per gallon to grain per oil barrel conversion exact?
Yes. Both grain per gallon and grain per oil barrel are defined by fixed standards rather than physical artifacts, so the factor of 42 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.