Mass per volume density.
Grains per Cup to Stones per Oil barrel Converter — gr/cup to st/bbl
Convert Grain per Cup (gr/cup) to Stone per Oil barrel (st/bbl) using the exact conversion factor (1 grain per cup = 0.0068571429 stone per oil barrel). See the formula, worked examples, and conversion table.
Grains per Cup to Stones 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 0.2738889767 / 39.94214244.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cup to Stones per Oil barrel
Grain per Cup and Stone 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
stones per oil barrel = grains per cup × 0.00685714285714
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cup equals 0.273888976724 base units, and 1 stone per oil barrel equals 39.942142439 base units, so dividing one by the other gives the direct grain per cup-to-stone per oil barrel factor of 0.00685714285714.
Simple example
1 gr/cup × 0.006857142857 = 0.0068571429 st/bbl
1 grain per cup = 0.0068571429 stones per oil barrel.
Real-world example
1,000 gr/cup × 0.006857142857 = 6.857142857 st/bbl
1,000 grains per cup = 6.857142857 stones per oil barrel.
Conversion table
| Grain per Cup (gr/cup) | Stone per Oil barrel (st/bbl) |
|---|---|
| 0.1 gr/cup | 0.0006857143 st/bbl |
| 1 gr/cup | 0.0068571429 st/bbl |
| 10 gr/cup | 0.0685714286 st/bbl |
| 100 gr/cup | 0.6857142857 st/bbl |
| 1,000 gr/cup | 6.857142857 st/bbl |
| 10,000 gr/cup | 68.57142857 st/bbl |
Reverse conversion: Stone per Oil barrel to Grain per Cup
0.0068571429 st/bbl × 145.8333333 = 1.000000006 gr/cup
0.0068571429 stones per oil barrel = 1.000000006 grains per cup.
grains per cup = stones per oil barrel × 145.833333333
For a page dedicated to this direction, see Stone per Oil barrel to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Stone per Oil barrel (st/bbl)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per oil barrel are in 1 grain per cup?
1 grain per cup equals 0.0068571429 stones per oil barrel, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to stone per oil barrel?
Multiply the grain per cup value by 0.006857142857. The converter above does this instantly to whatever precision you set.
How do I convert stone per oil barrel back to grain per cup?
Use the reverse factor: 1 stone per oil barrel equals 145.8333333 grains per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
What is a stone per oil barrel?
Stone per Oil barrel (st/bbl) is a unit of density.
Is the grain per cup to stone per oil barrel conversion exact?
Yes. Both grain per cup and stone per oil barrel are defined by fixed standards rather than physical artifacts, so the factor of 0.006857142857 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.