Mass per volume density.
Megagrams per Quart to Micrograms per Gallon Converter — Mg/qt to ug/gal
Convert Megagram per Quart (Mg/qt) to Microgram per Gallon (ug/gal) using the exact conversion factor (1 megagram per quart = 4e+12 microgram per gallon). See the formula, worked examples, and conversion table.
Megagrams 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+6 / 2.64172052e-7.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megagrams per Quart to Micrograms per Gallon
Megagram 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 = megagrams per quart × 4e+12
This factor comes from each unit's defined relationship to the category's base unit: 1 megagram per quart equals 1056688.20943 base units, and 1 microgram per gallon equals 2.641721e-7 base units, so dividing one by the other gives the direct megagram per quart-to-microgram per gallon factor of 4e+12.
Simple example
1 Mg/qt × 4e+12 = 4e+12 ug/gal
1 megagram per quart = 4e+12 micrograms per gallon.
Real-world example
1,000 Mg/qt × 4e+12 = 4e+15 ug/gal
1,000 megagrams per quart = 4e+15 micrograms per gallon.
Conversion table
| Megagram per Quart (Mg/qt) | Microgram per Gallon (ug/gal) |
|---|---|
| 0.1 Mg/qt | 400,000,000,000 ug/gal |
| 1 Mg/qt | 4e+12 ug/gal |
| 10 Mg/qt | 4e+13 ug/gal |
| 100 Mg/qt | 4e+14 ug/gal |
| 1,000 Mg/qt | 4e+15 ug/gal |
| 10,000 Mg/qt | 4e+16 ug/gal |
Reverse conversion: Microgram per Gallon to Megagram per Quart
4e+12 ug/gal × 2.5e-13 = 1 Mg/qt
4e+12 micrograms per gallon = 1 megagrams per quart.
megagrams per quart = micrograms per gallon × 2.5e-13
For a page dedicated to this direction, see Microgram per Gallon to Megagram per Quart.
Understanding the Megagram per Quart (Mg/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 megagram per quart?
1 megagram per quart equals 4e+12 micrograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert megagram per quart to microgram per gallon?
Multiply the megagram per quart value by 4e+12. The converter above does this instantly to whatever precision you set.
How do I convert microgram per gallon back to megagram per quart?
Use the reverse factor: 1 microgram per gallon equals 2.5e-13 megagrams per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a megagram per quart?
Megagram per Quart (Mg/qt) is a unit of density.
What is a microgram per gallon?
Microgram per Gallon (ug/gal) is a unit of density.
Is the megagram per quart to microgram per gallon conversion exact?
Yes. Both megagram per quart and microgram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 4e+12 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.