Mass per volume density.
Nanograms per Quart to Milligrams per Gallon Converter — ng/qt to mg/gal
Convert Nanogram per Quart (ng/qt) to Milligram per Gallon (mg/gal) using the exact conversion factor (1 nanogram per quart = 0.000004 milligram per gallon). See the formula, worked examples, and conversion table.
Nanograms per Quart to Milligrams 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 / 0.0002641720524.
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 Milligrams per Gallon
Nanogram per Quart and Milligram 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
milligrams per gallon = nanograms per quart × 0.000004
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 milligram per gallon equals 0.000264172052358 base units, so dividing one by the other gives the direct nanogram per quart-to-milligram per gallon factor of 0.000004.
Simple example
1 ng/qt × 0.000004 = 0.000004 mg/gal
1 nanogram per quart = 0.000004 milligrams per gallon.
Real-world example
1,000 ng/qt × 0.000004 = 0.004 mg/gal
1,000 nanograms per quart = 0.004 milligrams per gallon.
Conversion table
| Nanogram per Quart (ng/qt) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.1 ng/qt | 4e-7 mg/gal |
| 1 ng/qt | 0.000004 mg/gal |
| 10 ng/qt | 0.00004 mg/gal |
| 100 ng/qt | 0.0004 mg/gal |
| 1,000 ng/qt | 0.004 mg/gal |
| 10,000 ng/qt | 0.04 mg/gal |
Reverse conversion: Milligram per Gallon to Nanogram per Quart
0.000004 mg/gal × 250000 = 1 ng/qt
0.000004 milligrams per gallon = 1 nanograms per quart.
nanograms per quart = milligrams per gallon × 250000
For a page dedicated to this direction, see Milligram per Gallon to Nanogram per Quart.
Understanding the Nanogram per Quart (ng/qt)
Mass per volume density.
Understanding the Milligram per Gallon (mg/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per gallon are in 1 nanogram per quart?
1 nanogram per quart equals 0.000004 milligrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert nanogram per quart to milligram per gallon?
Multiply the nanogram per quart value by 0.000004. The converter above does this instantly to whatever precision you set.
How do I convert milligram per gallon back to nanogram per quart?
Use the reverse factor: 1 milligram per gallon equals 250,000 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 milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of density.
Is the nanogram per quart to milligram per gallon conversion exact?
Yes. Both nanogram per quart and milligram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.000004 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.