Mass concentration.
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
Chemistry Converter
Convert concentration, molarity, amount, and laboratory scientific units by compatible family.
Context values
Some unit families need one extra value for a physically accurate result.
Mass concentration.
Result = input x 0.0002641720524 / 1e-6.
Mass Concentration units are compatible.
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 mass concentration — how much of a substance is dissolved or dispersed in a given volume — a core calculation for preparing lab solutions, checking water quality against a regulatory limit, or formulating a pharmaceutical dose. Both are mass concentration 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
100 mg/gal × 264.1720524 = 26,417.20524 ug/L
100 milligrams per gallon = 26,417.20524 micrograms per liter.
Conversion table
| Milligram per Gallon (mg/gal) | Microgram per Liter (ug/L) |
|---|---|
| 0.001 mg/gal | 0.2641720524 ug/L |
| 0.01 mg/gal | 2.641720524 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 |
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 concentration.
Understanding the Microgram per Liter (ug/L)
Mass concentration.
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 chemistry.
What is a microgram per liter?
Microgram per Liter (ug/L) is a unit of chemistry.
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 mass concentration and molarity?
Mass concentration expresses how much mass of a substance is present per unit volume (for example, grams per liter). Molarity expresses the amount in moles per liter instead, which accounts for the substance's molecular weight. This category converts mass-concentration units.