Mass per volume density.
Stones per Pint to Grains per Fluid ounce Converter — st/pt to gr/fl oz
Convert Stone per Pint (st/pt) to Grain per Fluid ounce (gr/fl oz) using the exact conversion factor (1 stone per pint = 6,125 grain per fluid ounce). See the formula, worked examples, and conversion table.
Stones per Pint 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 13420.55986 / 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 Pint to Grains per Fluid ounce
Stone per Pint 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 pint × 6125
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per pint equals 13420.5598595 base units, and 1 grain per fluid ounce equals 2.19111181379 base units, so dividing one by the other gives the direct stone per pint-to-grain per fluid ounce factor of 6125.
Simple example
1 st/pt × 6125 = 6,125 gr/fl oz
1 stone per pint = 6,125 grains per fluid ounce.
Real-world example
1,000 st/pt × 6125 = 6,125,000 gr/fl oz
1,000 stones per pint = 6,125,000 grains per fluid ounce.
Conversion table
| Stone per Pint (st/pt) | Grain per Fluid ounce (gr/fl oz) |
|---|---|
| 0.1 st/pt | 612.5 gr/fl oz |
| 1 st/pt | 6,125 gr/fl oz |
| 10 st/pt | 61,250 gr/fl oz |
| 100 st/pt | 612,500 gr/fl oz |
| 1,000 st/pt | 6,125,000 gr/fl oz |
| 10,000 st/pt | 61,250,000 gr/fl oz |
Reverse conversion: Grain per Fluid ounce to Stone per Pint
1 gr/fl oz × 0.0001632653061 = 0.0001632653 st/pt
1 grain per fluid ounce = 0.0001632653 stones per pint.
stones per pint = grains per fluid ounce × 0.000163265306122
For a page dedicated to this direction, see Grain per Fluid ounce to Stone per Pint.
Understanding the Stone per Pint (st/pt)
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 pint?
1 stone per pint equals 6,125 grains per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert stone per pint to grain per fluid ounce?
Multiply the stone per pint value by 6125. The converter above does this instantly to whatever precision you set.
How do I convert grain per fluid ounce back to stone per pint?
Use the reverse factor: 1 grain per fluid ounce equals 0.0001632653 stones per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per pint?
Stone per Pint (st/pt) 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 pint to grain per fluid ounce conversion exact?
Yes. Both stone per pint and grain per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 6125 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.