Mass per volume density.
Pounds per Imperial gallon to Milligrams per Gallon Converter — lb/imp gal to mg/gal
Convert Pound per Imperial gallon (lb/imp gal) to Milligram per Gallon (mg/gal) using the exact conversion factor (1 pound per imperial gallon = 377,694.6568 milligram per gallon). See the formula, worked examples, and conversion table.
Pounds per Imperial gallon to Milligrams per Gallon 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 99.77637266 / 0.0002641720524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Imperial gallon to Milligrams per Gallon
Pound per Imperial gallon and Milligram per Gallon 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
milligrams per gallon = pounds per imperial gallon × 377694.656844
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per imperial gallon equals 99.7763726631 base units, and 1 milligram per gallon equals 0.000264172052358 base units, so dividing one by the other gives the direct pound per imperial gallon-to-milligram per gallon factor of 377694.656844.
Simple example
1 lb/imp gal × 377694.6568 = 377,694.6568 mg/gal
1 pound per imperial gallon = 377,694.6568 milligrams per gallon.
Real-world example
1,000 lb/imp gal × 377694.6568 = 377,694,656.8 mg/gal
1,000 pounds per imperial gallon = 377,694,656.8 milligrams per gallon.
Conversion table
| Pound per Imperial gallon (lb/imp gal) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.1 lb/imp gal | 37,769.46568 mg/gal |
| 1 lb/imp gal | 377,694.6568 mg/gal |
| 10 lb/imp gal | 3,776,946.568 mg/gal |
| 100 lb/imp gal | 37,769,465.68 mg/gal |
| 1,000 lb/imp gal | 377,694,656.8 mg/gal |
| 10,000 lb/imp gal | 3,776,946,568 mg/gal |
Reverse conversion: Milligram per Gallon to Pound per Imperial gallon
1 mg/gal × 0.000002647641373 = 0.0000026476 lb/imp gal
1 milligram per gallon = 0.0000026476 pounds per imperial gallon.
pounds per imperial gallon = milligrams per gallon × 0.00000264764137348
For a page dedicated to this direction, see Milligram per Gallon to Pound per Imperial gallon.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Understanding the Milligram per Gallon (mg/gal)
Mass per volume density.
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 imperial gallon?
1 pound per imperial gallon equals 377,694.6568 milligrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per imperial gallon to milligram per gallon?
Multiply the pound per imperial gallon value by 377694.6568. The converter above does this instantly to whatever precision you set.
How do I convert milligram per gallon back to pound per imperial gallon?
Use the reverse factor: 1 milligram per gallon equals 0.0000026476 pounds per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of density.
Is the pound per imperial gallon to milligram per gallon conversion exact?
Yes. Both pound per imperial gallon and milligram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 377694.6568 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.