Mass per volume density.
Stones per Gallon to Grains per Fluid ounce Converter — st/gal to gr/fl oz
Convert Stone per Gallon (st/gal) to Grain per Fluid ounce (gr/fl oz) using the exact conversion factor (1 stone per gallon = 765.625 grain per fluid ounce). See the formula, worked examples, and conversion table.
Stones per Gallon to Grains per Fluid ounce 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 1677.569982 / 2.191111814.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Grains per Fluid ounce
Stone per Gallon and Grain per Fluid ounce 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 fluid ounce = stones per gallon × 765.625
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 grain per fluid ounce equals 2.19111181379 base units, so dividing one by the other gives the direct stone per gallon-to-grain per fluid ounce factor of 765.625.
Simple example
1 st/gal × 765.625 = 765.625 gr/fl oz
1 stone per gallon = 765.625 grains per fluid ounce.
Real-world example
1,000 st/gal × 765.625 = 765,625 gr/fl oz
1,000 stones per gallon = 765,625 grains per fluid ounce.
Conversion table
| Stone per Gallon (st/gal) | Grain per Fluid ounce (gr/fl oz) |
|---|---|
| 0.1 st/gal | 76.5625 gr/fl oz |
| 1 st/gal | 765.625 gr/fl oz |
| 10 st/gal | 7,656.25 gr/fl oz |
| 100 st/gal | 76,562.5 gr/fl oz |
| 1,000 st/gal | 765,625 gr/fl oz |
| 10,000 st/gal | 7,656,250 gr/fl oz |
Reverse conversion: Grain per Fluid ounce to Stone per Gallon
765.625 gr/fl oz × 0.001306122449 = 1 st/gal
765.625 grains per fluid ounce = 1 stones per gallon.
stones per gallon = grains per fluid ounce × 0.00130612244898
For a page dedicated to this direction, see Grain per Fluid ounce to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Grain per Fluid ounce (gr/fl oz)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per fluid ounce are in 1 stone per gallon?
1 stone per gallon equals 765.625 grains per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to grain per fluid ounce?
Multiply the stone per gallon value by 765.625. The converter above does this instantly to whatever precision you set.
How do I convert grain per fluid ounce back to stone per gallon?
Use the reverse factor: 1 grain per fluid ounce equals 0.0013061224 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a grain per fluid ounce?
Grain per Fluid ounce (gr/fl oz) is a unit of density.
Is the stone per gallon to grain per fluid ounce conversion exact?
Yes. Both stone per gallon and grain per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 765.625 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.