Mass per volume density.
Milligrams per Gallon to Micrograms per Liter Converter — mg/gal to ug/L
Convert Milligram per Gallon (mg/gal) to Microgram per Liter (ug/L) using the exact conversion factor (1 milligram per gallon = 264.1720524 microgram per liter). See the formula, worked examples, and conversion table.
Milligrams per Gallon to Micrograms per Liter 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 0.0002641720524 / 1e-6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Gallon to Micrograms per Liter
Milligram per Gallon and Microgram per Liter 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 liter = milligrams per gallon × 264.172052358
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per gallon equals 0.000264172052358 base units, and 1 microgram per liter equals 0.000001 base units, so dividing one by the other gives the direct milligram per gallon-to-microgram per liter factor of 264.172052358.
Simple example
1 mg/gal × 264.1720524 = 264.1720524 ug/L
1 milligram per gallon = 264.1720524 micrograms per liter.
Real-world example
1,000 mg/gal × 264.1720524 = 264,172.0524 ug/L
1,000 milligrams per gallon = 264,172.0524 micrograms per liter.
Conversion table
| Milligram per Gallon (mg/gal) | Microgram per Liter (ug/L) |
|---|---|
| 0.1 mg/gal | 26.41720524 ug/L |
| 1 mg/gal | 264.1720524 ug/L |
| 10 mg/gal | 2,641.720524 ug/L |
| 100 mg/gal | 26,417.20524 ug/L |
| 1,000 mg/gal | 264,172.0524 ug/L |
| 10,000 mg/gal | 2,641,720.524 ug/L |
Reverse conversion: Microgram per Liter to Milligram per Gallon
264.1720524 ug/L × 0.003785411784 = 1 mg/gal
264.1720524 micrograms per liter = 1 milligrams per gallon.
milligrams per gallon = micrograms per liter × 0.003785411784
For a page dedicated to this direction, see Microgram per Liter to Milligram per Gallon.
Understanding the Milligram per Gallon (mg/gal)
Mass per volume density.
Understanding the Microgram per Liter (ug/L)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per liter are in 1 milligram per gallon?
1 milligram per gallon equals 264.1720524 micrograms per liter, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per gallon to microgram per liter?
Multiply the milligram per gallon value by 264.1720524. The converter above does this instantly to whatever precision you set.
How do I convert microgram per liter back to milligram per gallon?
Use the reverse factor: 1 microgram per liter equals 0.0037854118 milligrams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of density.
What is a microgram per liter?
Microgram per Liter (ug/L) is a unit of density.
Is the milligram per gallon to microgram per liter conversion exact?
Yes. Both milligram per gallon and microgram per liter are defined by fixed standards rather than physical artifacts, so the factor of 264.1720524 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.