Mass per volume density.
Grains per Cup to Kilograms per Cup Converter — gr/cup to kg/cup
Convert Grain per Cup (gr/cup) to Kilogram per Cup (kg/cup) using the exact conversion factor (1 grain per cup = 0.0000647989 kilogram per cup). See the formula, worked examples, and conversion table.
Grains per Cup 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 0.2738889767 / 4226.752838.
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 Kilograms per Cup
Grain per Cup 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 = grains per cup × 0.00006479891
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 kilogram per cup equals 4226.75283773 base units, so dividing one by the other gives the direct grain per cup-to-kilogram per cup factor of 0.00006479891.
Simple example
1 gr/cup × 0.00006479891 = 0.0000647989 kg/cup
1 grain per cup = 0.0000647989 kilograms per cup.
Real-world example
1,000 gr/cup × 0.00006479891 = 0.06479891 kg/cup
1,000 grains per cup = 0.06479891 kilograms per cup.
Conversion table
| Grain per Cup (gr/cup) | Kilogram per Cup (kg/cup) |
|---|---|
| 0.1 gr/cup | 0.0000064799 kg/cup |
| 1 gr/cup | 0.0000647989 kg/cup |
| 10 gr/cup | 0.0006479891 kg/cup |
| 100 gr/cup | 0.006479891 kg/cup |
| 1,000 gr/cup | 0.06479891 kg/cup |
| 10,000 gr/cup | 0.6479891 kg/cup |
Reverse conversion: Kilogram per Cup to Grain per Cup
0.0000647989 kg/cup × 15432.35835 = 0.9999998457 gr/cup
0.0000647989 kilograms per cup = 0.9999998457 grains per cup.
grains per cup = kilograms per cup × 15432.3583529
For a page dedicated to this direction, see Kilogram per Cup to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
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 grain per cup?
1 grain per cup equals 0.0000647989 kilograms per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to kilogram per cup?
Multiply the grain per cup value by 0.00006479891. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cup back to grain per cup?
Use the reverse factor: 1 kilogram per cup equals 15,432.35835 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 kilogram per cup?
Kilogram per Cup (kg/cup) is a unit of density.
Is the grain per cup to kilogram per cup conversion exact?
Yes. Both grain per cup and kilogram per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.00006479891 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.