Mass per volume density.
Kilograms per Gallon to Grams per Cubic Millimeter Converter — kg/gal to g/mm3
Convert Kilogram per Gallon (kg/gal) to Gram per Cubic Millimeter (g/mm3) using the exact conversion factor (1 kilogram per gallon = 0.0002641721 gram per cubic millimeter). See the formula, worked examples, conversion table, and common uses.
Kilograms per Gallon to Grams per Cubic Millimeter 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 264.1720524 / 1e+6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilograms per Gallon to Grams per Cubic Millimeter
Kilogram per Gallon and Gram per Cubic Millimeter 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. Kilogram per Gallon is most often used for can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (us customary) are the specific pairings more commonly seen in fuel and liquid-density references.
Formula
grams per cubic millimeter = kilograms per gallon × 0.000264172052358
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogram per gallon equals 264.172052358 base units, and 1 gram per cubic millimeter equals 1000000 base units, so dividing one by the other gives the direct kilogram per gallon-to-gram per cubic millimeter factor of 0.000264172052358.
Simple example
1 kg/gal × 0.0002641720524 = 0.0002641721 g/mm3
1 kilogram per gallon = 0.0002641721 grams per cubic millimeter.
Real-world example
1,000 kg/gal × 0.0002641720524 = 0.2641720524 g/mm3
1,000 kilograms per gallon = 0.2641720524 grams per cubic millimeter.
Conversion table
| Kilogram per Gallon (kg/gal) | Gram per Cubic Millimeter (g/mm3) |
|---|---|
| 0.1 kg/gal | 0.0000264172 g/mm3 |
| 1 kg/gal | 0.0002641721 g/mm3 |
| 10 kg/gal | 0.0026417205 g/mm3 |
| 100 kg/gal | 0.0264172052 g/mm3 |
| 1,000 kg/gal | 0.2641720524 g/mm3 |
| 10,000 kg/gal | 2.641720524 g/mm3 |
Reverse conversion: Gram per Cubic Millimeter to Kilogram per Gallon
0.0002641721 g/mm3 × 3785.411784 = 1.00000018 kg/gal
0.0002641721 grams per cubic millimeter = 1.00000018 kilograms per gallon.
kilograms per gallon = grams per cubic millimeter × 3785.411784
For a page dedicated to this direction, see Gram per Cubic Millimeter to Kilogram per Gallon.
Understanding the Kilogram per Gallon
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Gallon today
- Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references
Understanding the Gram per Cubic Millimeter (g/mm3)
Mass per volume density.
Kilogram per Gallon — sources
- Fuel and petroleum liquid-density references — Liquid density figures for fuels are typically reported in kg/L, kg/m³, or lb/gal rather than kg/gal.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cubic millimeter are in 1 kilogram per gallon?
1 kilogram per gallon equals 0.0002641721 grams per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert kilogram per gallon to gram per cubic millimeter?
Multiply the kilogram per gallon value by 0.0002641720524. The converter above does this instantly to whatever precision you set.
How do I convert gram per cubic millimeter back to kilogram per gallon?
Use the reverse factor: 1 gram per cubic millimeter equals 3,785.411784 kilograms per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilogram per gallon?
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
What is a gram per cubic millimeter?
Gram per Cubic Millimeter (g/mm3) is a unit of density.
Is the kilogram per gallon to gram per cubic millimeter conversion exact?
Yes. Both kilogram per gallon and gram per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.0002641720524 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.