Mass per volume density.
Stones per Fluid ounce to Kilograms per Cup Converter — st/fl oz to kg/cup
Convert Stone per Fluid ounce (st/fl oz) to Kilogram per Cup (kg/cup) using the exact conversion factor (1 stone per fluid ounce = 50.80234544 kilogram per cup). See the formula, worked examples, and conversion table.
Stones per Fluid ounce to Kilograms 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 214728.9578 / 4226.752838.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Fluid ounce to Kilograms per Cup
Stone per Fluid ounce and Kilogram 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
kilograms per cup = stones per fluid ounce × 50.80234544
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per fluid ounce equals 214728.957752 base units, and 1 kilogram per cup equals 4226.75283773 base units, so dividing one by the other gives the direct stone per fluid ounce-to-kilogram per cup factor of 50.80234544.
Simple example
1 st/fl oz × 50.80234544 = 50.80234544 kg/cup
1 stone per fluid ounce = 50.80234544 kilograms per cup.
Real-world example
1,000 st/fl oz × 50.80234544 = 50,802.34544 kg/cup
1,000 stones per fluid ounce = 50,802.34544 kilograms per cup.
Conversion table
| Stone per Fluid ounce (st/fl oz) | Kilogram per Cup (kg/cup) |
|---|---|
| 0.1 st/fl oz | 5.080234544 kg/cup |
| 1 st/fl oz | 50.80234544 kg/cup |
| 10 st/fl oz | 508.0234544 kg/cup |
| 100 st/fl oz | 5,080.234544 kg/cup |
| 1,000 st/fl oz | 50,802.34544 kg/cup |
| 10,000 st/fl oz | 508,023.4544 kg/cup |
Reverse conversion: Kilogram per Cup to Stone per Fluid ounce
50.80234544 kg/cup × 0.01968413055 = 1 st/fl oz
50.80234544 kilograms per cup = 1 stones per fluid ounce.
stones per fluid ounce = kilograms per cup × 0.0196841305522
For a page dedicated to this direction, see Kilogram per Cup to Stone per Fluid ounce.
Understanding the Stone per Fluid ounce (st/fl oz)
Mass per volume density.
Understanding the Kilogram per Cup (kg/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cup are in 1 stone per fluid ounce?
1 stone per fluid ounce equals 50.80234544 kilograms per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per fluid ounce to kilogram per cup?
Multiply the stone per fluid ounce value by 50.80234544. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cup back to stone per fluid ounce?
Use the reverse factor: 1 kilogram per cup equals 0.0196841306 stones per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per fluid ounce?
Stone per Fluid ounce (st/fl oz) is a unit of density.
What is a kilogram per cup?
Kilogram per Cup (kg/cup) is a unit of density.
Is the stone per fluid ounce to kilogram per cup conversion exact?
Yes. Both stone per fluid ounce and kilogram per cup are defined by fixed standards rather than physical artifacts, so the factor of 50.80234544 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.