Mass per volume density.
Grams per Gallon to Micrograms per Liter Converter — g/gal to ug/L
Convert Gram per Gallon (g/gal) to Microgram per Liter (ug/L) using the exact conversion factor (1 gram per gallon = 264,172.0524 microgram per liter). See the formula, worked examples, and conversion table.
Grams 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 0.2641720524 / 1e-6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Gallon to Micrograms per Liter
Gram 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 = grams per gallon × 264172.052358
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per gallon equals 0.264172052358 base units, and 1 microgram per liter equals 0.000001 base units, so dividing one by the other gives the direct gram per gallon-to-microgram per liter factor of 264172.052358.
Simple example
1 g/gal × 264172.0524 = 264,172.0524 ug/L
1 gram per gallon = 264,172.0524 micrograms per liter.
Real-world example
1,000 g/gal × 264172.0524 = 264,172,052.4 ug/L
1,000 grams per gallon = 264,172,052.4 micrograms per liter.
Conversion table
| Gram per Gallon (g/gal) | Microgram per Liter (ug/L) |
|---|---|
| 0.1 g/gal | 26,417.20524 ug/L |
| 1 g/gal | 264,172.0524 ug/L |
| 10 g/gal | 2,641,720.524 ug/L |
| 100 g/gal | 26,417,205.24 ug/L |
| 1,000 g/gal | 264,172,052.4 ug/L |
| 10,000 g/gal | 2,641,720,524 ug/L |
Reverse conversion: Microgram per Liter to Gram per Gallon
1 ug/L × 0.000003785411784 = 0.0000037854 g/gal
1 microgram per liter = 0.0000037854 grams per gallon.
grams per gallon = micrograms per liter × 0.000003785411784
For a page dedicated to this direction, see Microgram per Liter to Gram per Gallon.
Understanding the Gram per Gallon (g/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 gram per gallon?
1 gram per gallon equals 264,172.0524 micrograms per liter, using the exact defined conversion factor rather than an estimate.
How do I convert gram per gallon to microgram per liter?
Multiply the gram per gallon value by 264172.0524. The converter above does this instantly to whatever precision you set.
How do I convert microgram per liter back to gram per gallon?
Use the reverse factor: 1 microgram per liter equals 0.0000037854 grams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per gallon?
Gram per Gallon (g/gal) is a unit of density.
What is a microgram per liter?
Microgram per Liter (ug/L) is a unit of density.
Is the gram per gallon to microgram per liter conversion exact?
Yes. Both gram per gallon and microgram per liter are defined by fixed standards rather than physical artifacts, so the factor of 264172.0524 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.