Mass concentration.
Pounds per Liter to Milligrams per Gallon Converter — lb/L to mg/gal
Convert Pound per Liter (lb/L) to Milligram per Gallon (mg/gal) using the exact conversion factor (1 pound per liter = 1,717,033.903 milligram per gallon). See the formula, worked examples, and conversion table.
Pounds per Liter 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 453.59237 / 0.0002641720524.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Liter to Milligrams per Gallon
Pound per Liter 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 = pounds per liter × 1717033.90253
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per liter equals 453.59237 base units, and 1 milligram per gallon equals 0.000264172052358 base units, so dividing one by the other gives the direct pound per liter-to-milligram per gallon factor of 1717033.90253.
Simple example
1 lb/L × 1717033.903 = 1,717,033.903 mg/gal
1 pound per liter = 1,717,033.903 milligrams per gallon.
Real-world example
100 lb/L × 1717033.903 = 171,703,390.3 mg/gal
100 pounds per liter = 171,703,390.3 milligrams per gallon.
Conversion table
| Pound per Liter (lb/L) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.001 lb/L | 1,717.033903 mg/gal |
| 0.01 lb/L | 17,170.33903 mg/gal |
| 0.1 lb/L | 171,703.3903 mg/gal |
| 1 lb/L | 1,717,033.903 mg/gal |
| 10 lb/L | 17,170,339.03 mg/gal |
| 100 lb/L | 171,703,390.3 mg/gal |
Reverse conversion: Milligram per Gallon to Pound per Liter
1 mg/gal × 5.823997e-7 = 5.823997e-7 lb/L
1 milligram per gallon = 5.823997e-7 pounds per liter.
pounds per liter = milligrams per gallon × 5.823997e-7
For a page dedicated to this direction, see Milligram per Gallon to Pound per Liter.
Understanding the Pound per Liter (lb/L)
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 pound per liter?
1 pound per liter equals 1,717,033.903 milligrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per liter to milligram per gallon?
Multiply the pound per liter value by 1717033.903. The converter above does this instantly to whatever precision you set.
How do I convert milligram per gallon back to pound per liter?
Use the reverse factor: 1 milligram per gallon equals 5.823997e-7 pounds per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per liter?
Pound per Liter (lb/L) is a unit of chemistry.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of chemistry.
Is the pound per liter to milligram per gallon conversion exact?
Yes. Both pound per liter and milligram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 1717033.903 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.