Mass per volume density.
Picograms per Quart to Micrograms per Gallon Converter — pg/qt to ug/gal
Convert Picogram per Quart (pg/qt) to Microgram per Gallon (ug/gal) using the exact conversion factor (1 picogram per quart = 0.000004 microgram per gallon). See the formula, worked examples, and conversion table.
Picograms per Quart to Micrograms 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-12 / 2.64172052e-7.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Picograms per Quart to Micrograms per Gallon
Picogram per Quart and Microgram 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
micrograms per gallon = picograms per quart × 0.000004
This factor comes from each unit's defined relationship to the category's base unit: 1 picogram per quart equals 1.056688e-12 base units, and 1 microgram per gallon equals 2.641721e-7 base units, so dividing one by the other gives the direct picogram per quart-to-microgram per gallon factor of 0.000004.
Simple example
1 pg/qt × 0.000004 = 0.000004 ug/gal
1 picogram per quart = 0.000004 micrograms per gallon.
Real-world example
1,000 pg/qt × 0.000004 = 0.004 ug/gal
1,000 picograms per quart = 0.004 micrograms per gallon.
Conversion table
| Picogram per Quart (pg/qt) | Microgram per Gallon (ug/gal) |
|---|---|
| 0.1 pg/qt | 4e-7 ug/gal |
| 1 pg/qt | 0.000004 ug/gal |
| 10 pg/qt | 0.00004 ug/gal |
| 100 pg/qt | 0.0004 ug/gal |
| 1,000 pg/qt | 0.004 ug/gal |
| 10,000 pg/qt | 0.04 ug/gal |
Reverse conversion: Microgram per Gallon to Picogram per Quart
0.000004 ug/gal × 250000 = 1 pg/qt
0.000004 micrograms per gallon = 1 picogram per quart.
picograms per quart = micrograms per gallon × 250000
For a page dedicated to this direction, see Microgram per Gallon to Picogram per Quart.
Understanding the Picogram per Quart (pg/qt)
Mass per volume density.
Understanding the Microgram per Gallon (ug/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per gallon are in 1 picogram per quart?
1 picogram per quart equals 0.000004 micrograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert picogram per quart to microgram per gallon?
Multiply the picogram per quart value by 0.000004. The converter above does this instantly to whatever precision you set.
How do I convert microgram per gallon back to picogram per quart?
Use the reverse factor: 1 microgram per gallon equals 250,000 picograms per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a picogram per quart?
Picogram per Quart (pg/qt) is a unit of density.
What is a microgram per gallon?
Microgram per Gallon (ug/gal) is a unit of density.
Is the picogram per quart to microgram per gallon conversion exact?
Yes. Both picogram per quart and microgram 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.