Mass per volume density.
Grains per Cubic Millimeter to Carats per Quart Converter — gr/mm3 to ct/qt
Convert Grain per Cubic Millimeter (gr/mm3) to Carat per Quart (ct/qt) using the exact conversion factor (1 grain per cubic millimeter = 306,613.1969 carat per quart). See the formula, worked examples, and conversion table.
Grains per Cubic Millimeter to Carats per Quart 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 64798.91 / 0.2113376419.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cubic Millimeter to Carats per Quart
Grain per Cubic Millimeter and Carat per Quart 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
carats per quart = grains per cubic millimeter × 306613.19688
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cubic millimeter equals 64798.91 base units, and 1 carat per quart equals 0.211337641887 base units, so dividing one by the other gives the direct grain per cubic millimeter-to-carat per quart factor of 306613.19688.
Simple example
1 gr/mm3 × 306613.1969 = 306,613.1969 ct/qt
1 grain per cubic millimeter = 306,613.1969 carats per quart.
Real-world example
1,000 gr/mm3 × 306613.1969 = 306,613,196.9 ct/qt
1,000 grains per cubic millimeter = 306,613,196.9 carats per quart.
Conversion table
| Grain per Cubic Millimeter (gr/mm3) | Carat per Quart (ct/qt) |
|---|---|
| 0.1 gr/mm3 | 30,661.31969 ct/qt |
| 1 gr/mm3 | 306,613.1969 ct/qt |
| 10 gr/mm3 | 3,066,131.969 ct/qt |
| 100 gr/mm3 | 30,661,319.69 ct/qt |
| 1,000 gr/mm3 | 306,613,196.9 ct/qt |
| 10,000 gr/mm3 | 3,066,131,969 ct/qt |
Reverse conversion: Carat per Quart to Grain per Cubic Millimeter
1 ct/qt × 0.000003261438223 = 0.0000032614 gr/mm3
1 carat per quart = 0.0000032614 grains per cubic millimeter.
grains per cubic millimeter = carats per quart × 0.00000326143822306
For a page dedicated to this direction, see Carat per Quart to Grain per Cubic Millimeter.
Understanding the Grain per Cubic Millimeter (gr/mm3)
Mass per volume density.
Understanding the Carat per Quart (ct/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per quart are in 1 grain per cubic millimeter?
1 grain per cubic millimeter equals 306,613.1969 carats per quart, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cubic millimeter to carat per quart?
Multiply the grain per cubic millimeter value by 306613.1969. The converter above does this instantly to whatever precision you set.
How do I convert carat per quart back to grain per cubic millimeter?
Use the reverse factor: 1 carat per quart equals 0.0000032614 grains per cubic millimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cubic millimeter?
Grain per Cubic Millimeter (gr/mm3) is a unit of density.
What is a carat per quart?
Carat per Quart (ct/qt) is a unit of density.
Is the grain per cubic millimeter to carat per quart conversion exact?
Yes. Both grain per cubic millimeter and carat per quart are defined by fixed standards rather than physical artifacts, so the factor of 306613.1969 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.