Mass concentration.
Grams per Gallon to Milligrams per Gallon Converter — g/gal to mg/gal
Convert Gram per Gallon (g/gal) to Milligram per Gallon (mg/gal) using the exact conversion factor (1 gram per gallon = 1,000 milligram per gallon). See the formula, worked examples, and conversion table.
Grams per Gallon to Milligrams per Gallon 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 0.2641720524 / 0.0002641720524.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Gallon to Milligrams per Gallon
Gram per Gallon and Milligram per Gallon 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
milligrams per gallon = grams per gallon × 1000
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 milligram per gallon equals 0.000264172052358 base units, so dividing one by the other gives the direct gram per gallon-to-milligram per gallon factor of 1000.
Simple example
1 g/gal × 1000 = 1,000 mg/gal
1 gram per gallon = 1,000 milligrams per gallon.
Real-world example
100 g/gal × 1000 = 100,000 mg/gal
100 grams per gallon = 100,000 milligrams per gallon.
Conversion table
| Gram per Gallon (g/gal) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.001 g/gal | 1 mg/gal |
| 0.01 g/gal | 10 mg/gal |
| 0.1 g/gal | 100 mg/gal |
| 1 g/gal | 1,000 mg/gal |
| 10 g/gal | 10,000 mg/gal |
| 100 g/gal | 100,000 mg/gal |
Reverse conversion: Milligram per Gallon to Gram per Gallon
1 mg/gal × 0.001 = 0.001 g/gal
1 milligram per gallon = 0.001 grams per gallon.
grams per gallon = milligrams per gallon × 0.001
For a page dedicated to this direction, see Milligram per Gallon to Gram per Gallon.
Understanding the Gram per Gallon (g/gal)
Mass concentration.
Understanding the Milligram per Gallon (mg/gal)
Mass concentration.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per gallon are in 1 gram per gallon?
1 gram per gallon equals 1,000 milligrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per gallon to milligram per gallon?
Multiply the gram per gallon value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert milligram per gallon back to gram per gallon?
Use the reverse factor: 1 milligram per gallon equals 0.001 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 chemistry.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of chemistry.
Is the gram per gallon to milligram per gallon conversion exact?
Yes. Both gram per gallon and milligram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.