Mass per volume density.
Nanograms per Quart to Picograms per Gallon Converter — ng/qt to pg/gal
Convert Nanogram per Quart (ng/qt) to Picogram per Gallon (pg/gal) using the exact conversion factor (1 nanogram per quart = 4,000 picogram per gallon). See the formula, worked examples, and conversion table.
Nanograms per Quart to Picograms 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 / 2.64172052e-13.
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 Picograms per Gallon
Nanogram per Quart and Picogram 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
picograms per gallon = nanograms per quart × 4000
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 picogram per gallon equals 2.641721e-13 base units, so dividing one by the other gives the direct nanogram per quart-to-picogram per gallon factor of 4000.
Simple example
1 ng/qt × 4000 = 4,000 pg/gal
1 nanogram per quart = 4,000 picograms per gallon.
Real-world example
1,000 ng/qt × 4000 = 4,000,000 pg/gal
1,000 nanograms per quart = 4,000,000 picograms per gallon.
Conversion table
| Nanogram per Quart (ng/qt) | Picogram per Gallon (pg/gal) |
|---|---|
| 0.1 ng/qt | 400 pg/gal |
| 1 ng/qt | 4,000 pg/gal |
| 10 ng/qt | 40,000 pg/gal |
| 100 ng/qt | 400,000 pg/gal |
| 1,000 ng/qt | 4,000,000 pg/gal |
| 10,000 ng/qt | 40,000,000 pg/gal |
Reverse conversion: Picogram per Gallon to Nanogram per Quart
1 pg/gal × 0.00025 = 0.00025 ng/qt
1 picogram per gallon = 0.00025 nanograms per quart.
nanograms per quart = picograms per gallon × 0.00025
For a page dedicated to this direction, see Picogram per Gallon to Nanogram per Quart.
Understanding the Nanogram per Quart (ng/qt)
Mass per volume density.
Understanding the Picogram per Gallon (pg/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picograms per gallon are in 1 nanogram per quart?
1 nanogram per quart equals 4,000 picograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert nanogram per quart to picogram per gallon?
Multiply the nanogram per quart value by 4000. The converter above does this instantly to whatever precision you set.
How do I convert picogram per gallon back to nanogram per quart?
Use the reverse factor: 1 picogram per gallon equals 0.00025 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 picogram per gallon?
Picogram per Gallon (pg/gal) is a unit of density.
Is the nanogram per quart to picogram per gallon conversion exact?
Yes. Both nanogram per quart and picogram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 4000 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.