Mass per volume density.
Nanograms per Quart to Centigrams per Gallon Converter — ng/qt to cg/gal
Convert Nanogram per Quart (ng/qt) to Centigram per Gallon (cg/gal) using the exact conversion factor (1 nanogram per quart = 4e-7 centigram per gallon). See the formula, worked examples, and conversion table.
Nanograms per Quart to Centigrams per Gallon 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 1.05668821e-9 / 0.002641720524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanograms per Quart to Centigrams per Gallon
Nanogram per Quart and Centigram per Gallon 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
centigrams per gallon = nanograms per quart × 4e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 nanogram per quart equals 1.056688e-9 base units, and 1 centigram per gallon equals 0.00264172052358 base units, so dividing one by the other gives the direct nanogram per quart-to-centigram per gallon factor of 4e-7.
Simple example
1 ng/qt × 4e-7 = 4e-7 cg/gal
1 nanogram per quart = 4e-7 centigrams per gallon.
Real-world example
1,000 ng/qt × 4e-7 = 0.0004 cg/gal
1,000 nanograms per quart = 0.0004 centigrams per gallon.
Conversion table
| Nanogram per Quart (ng/qt) | Centigram per Gallon (cg/gal) |
|---|---|
| 0.1 ng/qt | 4e-8 cg/gal |
| 1 ng/qt | 4e-7 cg/gal |
| 10 ng/qt | 0.000004 cg/gal |
| 100 ng/qt | 0.00004 cg/gal |
| 1,000 ng/qt | 0.0004 cg/gal |
| 10,000 ng/qt | 0.004 cg/gal |
Reverse conversion: Centigram per Gallon to Nanogram per Quart
4e-7 cg/gal × 2500000 = 1 ng/qt
4e-7 centigrams per gallon = 1 nanograms per quart.
nanograms per quart = centigrams per gallon × 2500000
For a page dedicated to this direction, see Centigram per Gallon to Nanogram per Quart.
Understanding the Nanogram per Quart (ng/qt)
Mass per volume density.
Understanding the Centigram per Gallon (cg/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centigrams per gallon are in 1 nanogram per quart?
1 nanogram per quart equals 4e-7 centigrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert nanogram per quart to centigram per gallon?
Multiply the nanogram per quart value by 4e-7. The converter above does this instantly to whatever precision you set.
How do I convert centigram per gallon back to nanogram per quart?
Use the reverse factor: 1 centigram per gallon equals 2,500,000 nanograms per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanogram per quart?
Nanogram per Quart (ng/qt) is a unit of density.
What is a centigram per gallon?
Centigram per Gallon (cg/gal) is a unit of density.
Is the nanogram per quart to centigram per gallon conversion exact?
Yes. Both nanogram per quart and centigram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 4e-7 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.