Mass per volume density.
Stones per Oil barrel to Grains per Cup Converter — st/bbl to gr/cup
Convert Stone per Oil barrel (st/bbl) to Grain per Cup (gr/cup) using the exact conversion factor (1 stone per oil barrel = 145.8333333 grain per cup). See the formula, worked examples, and conversion table.
Stones per Oil barrel to Grains per Cup 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 39.94214244 / 0.2738889767.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Oil barrel to Grains per Cup
Stone per Oil barrel and Grain per Cup 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 cup = stones per oil barrel × 145.833333333
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per oil barrel equals 39.942142439 base units, and 1 grain per cup equals 0.273888976724 base units, so dividing one by the other gives the direct stone per oil barrel-to-grain per cup factor of 145.833333333.
Simple example
1 st/bbl × 145.8333333 = 145.8333333 gr/cup
1 stone per oil barrel = 145.8333333 grains per cup.
Real-world example
1,000 st/bbl × 145.8333333 = 145,833.3333 gr/cup
1,000 stones per oil barrel = 145,833.3333 grains per cup.
Conversion table
| Stone per Oil barrel (st/bbl) | Grain per Cup (gr/cup) |
|---|---|
| 0.1 st/bbl | 14.58333333 gr/cup |
| 1 st/bbl | 145.8333333 gr/cup |
| 10 st/bbl | 1,458.333333 gr/cup |
| 100 st/bbl | 14,583.33333 gr/cup |
| 1,000 st/bbl | 145,833.3333 gr/cup |
| 10,000 st/bbl | 1,458,333.333 gr/cup |
Reverse conversion: Grain per Cup to Stone per Oil barrel
145.8333333 gr/cup × 0.006857142857 = 0.9999999998 st/bbl
145.8333333 grains per cup = 0.9999999998 stones per oil barrel.
stones per oil barrel = grains per cup × 0.00685714285714
For a page dedicated to this direction, see Grain per Cup to Stone per Oil barrel.
Understanding the Stone per Oil barrel (st/bbl)
Mass per volume density.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per cup are in 1 stone per oil barrel?
1 stone per oil barrel equals 145.8333333 grains per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per oil barrel to grain per cup?
Multiply the stone per oil barrel value by 145.8333333. The converter above does this instantly to whatever precision you set.
How do I convert grain per cup back to stone per oil barrel?
Use the reverse factor: 1 grain per cup equals 0.0068571429 stones per oil barrel. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per oil barrel?
Stone per Oil barrel (st/bbl) is a unit of density.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
Is the stone per oil barrel to grain per cup conversion exact?
Yes. Both stone per oil barrel and grain per cup are defined by fixed standards rather than physical artifacts, so the factor of 145.8333333 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.