Mass per volume density.
Grains per Cup to Kilograms per Cubic Meter Converter — gr/cup to kg/m3
Convert Grain per Cup (gr/cup) to Kilogram per Cubic Meter (kg/m3) using the exact conversion factor (1 grain per cup = 0.2738889767 kilogram per cubic meter). See the formula, worked examples, conversion table, and common uses.
Grains per Cup to Kilograms per Cubic Meter 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 / 1.
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 Cubic Meter
Grain per Cup and Kilogram per Cubic Meter 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 cubic meter = grains per cup × 0.273888976724
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 cubic meter equals 1 base unit, so dividing one by the other gives the direct grain per cup-to-kilogram per cubic meter factor of 0.273888976724.
Simple example
1 gr/cup × 0.2738889767 = 0.2738889767 kg/m3
1 grain per cup = 0.2738889767 kilograms per cubic meter.
Real-world example
1,000 gr/cup × 0.2738889767 = 273.8889767 kg/m3
1,000 grains per cup = 273.8889767 kilograms per cubic meter.
Conversion table
| Grain per Cup (gr/cup) | Kilogram per Cubic Meter (kg/m3) |
|---|---|
| 0.1 gr/cup | 0.0273888977 kg/m3 |
| 1 gr/cup | 0.2738889767 kg/m3 |
| 10 gr/cup | 2.738889767 kg/m3 |
| 100 gr/cup | 27.38889767 kg/m3 |
| 1,000 gr/cup | 273.8889767 kg/m3 |
| 10,000 gr/cup | 2,738.889767 kg/m3 |
Reverse conversion: Kilogram per Cubic Meter to Grain per Cup
0.2738889767 kg/m3 × 3.651114448 = 0.9999999999 gr/cup
0.2738889767 kilograms per cubic meter = 0.9999999999 grains per cup.
grains per cup = kilograms per cubic meter × 3.65111444776
For a page dedicated to this direction, see Kilogram per Cubic Meter to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Kilogram per Cubic Meter
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
Where it's used: Universal — the official SI unit for density, used throughout physics and engineering worldwide
kg/m³ vs. g/L vs. kg/L. All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.
Uses of the Kilogram per Cubic Meter today
- Physics and engineering reference density values
- Material property tables in scientific literature
- Fluid dynamics and structural engineering calculations
Kilogram per Cubic Meter — sources
- BIPM SI Brochure, 9th edition — Kilogram per cubic meter as the SI coherent derived unit for density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cubic meter are in 1 grain per cup?
1 grain per cup equals 0.2738889767 kilograms per cubic meter, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to kilogram per cubic meter?
Multiply the grain per cup value by 0.2738889767. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cubic meter back to grain per cup?
Use the reverse factor: 1 kilogram per cubic meter equals 3.651114448 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 cubic meter?
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
Is the grain per cup to kilogram per cubic meter conversion exact?
Yes. Both grain per cup and kilogram per cubic meter are defined by fixed standards rather than physical artifacts, so the factor of 0.2738889767 used above is exact to as many digits as you choose to display.
What is the difference between kg/m³ vs. g/l vs. kg/l?
All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.