Mass per volume density.
Grains per Imperial gallon to Drams per Oil barrel Converter — gr/imp gal to dr/bbl
Convert Grain per Imperial gallon (gr/imp gal) to Dram per Oil barrel (dr/bbl) using the exact conversion factor (1 grain per imperial gallon = 1.278987548 dram per oil barrel). See the formula, worked examples, and conversion table.
Grains per Imperial gallon to Drams 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 0.01425376752 / 0.01114457099.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Imperial gallon to Drams per Oil barrel
Grain per Imperial gallon and Dram 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
drams per oil barrel = grains per imperial gallon × 1.27898754759
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per imperial gallon equals 0.0142537675233 base units, and 1 dram per oil barrel equals 0.011144570993 base units, so dividing one by the other gives the direct grain per imperial gallon-to-dram per oil barrel factor of 1.27898754759.
Simple example
1 gr/imp gal × 1.278987548 = 1.278987548 dr/bbl
1 grain per imperial gallon = 1.278987548 drams per oil barrel.
Real-world example
1,000 gr/imp gal × 1.278987548 = 1,278.987548 dr/bbl
1,000 grains per imperial gallon = 1,278.987548 drams per oil barrel.
Conversion table
| Grain per Imperial gallon (gr/imp gal) | Dram per Oil barrel (dr/bbl) |
|---|---|
| 0.1 gr/imp gal | 0.1278987548 dr/bbl |
| 1 gr/imp gal | 1.278987548 dr/bbl |
| 10 gr/imp gal | 12.78987548 dr/bbl |
| 100 gr/imp gal | 127.8987548 dr/bbl |
| 1,000 gr/imp gal | 1,278.987548 dr/bbl |
| 10,000 gr/imp gal | 12,789.87548 dr/bbl |
Reverse conversion: Dram per Oil barrel to Grain per Imperial gallon
1.278987548 dr/bbl × 0.7818684411 = 1 gr/imp gal
1.278987548 drams per oil barrel = 1 grains per imperial gallon.
grains per imperial gallon = drams per oil barrel × 0.781868441084
For a page dedicated to this direction, see Dram per Oil barrel to Grain per Imperial gallon.
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Understanding the Dram per Oil barrel (dr/bbl)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per oil barrel are in 1 grain per imperial gallon?
1 grain per imperial gallon equals 1.278987548 drams per oil barrel, using the exact defined conversion factor rather than an estimate.
How do I convert grain per imperial gallon to dram per oil barrel?
Multiply the grain per imperial gallon value by 1.278987548. The converter above does this instantly to whatever precision you set.
How do I convert dram per oil barrel back to grain per imperial gallon?
Use the reverse factor: 1 dram per oil barrel equals 0.7818684411 grains per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
What is a dram per oil barrel?
Dram per Oil barrel (dr/bbl) is a unit of density.
Is the grain per imperial gallon to dram per oil barrel conversion exact?
Yes. Both grain per imperial gallon and dram per oil barrel are defined by fixed standards rather than physical artifacts, so the factor of 1.278987548 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.