Mass per volume density.
Micrograms per Fluid ounce to Milligrams per Gallon Converter — ug/fl oz to mg/gal
Convert Microgram per Fluid ounce (ug/fl oz) to Milligram per Gallon (mg/gal) using the exact conversion factor (1 microgram per fluid ounce = 0.128 milligram per gallon). See the formula, worked examples, and conversion table.
Micrograms per Fluid ounce 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 3.38140227e-5 / 0.0002641720524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Fluid ounce to Milligrams per Gallon
Microgram per Fluid ounce 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 = micrograms per fluid ounce × 0.128
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per fluid ounce equals 0.0000338140227018 base units, and 1 milligram per gallon equals 0.000264172052358 base units, so dividing one by the other gives the direct microgram per fluid ounce-to-milligram per gallon factor of 0.128.
Simple example
1 ug/fl oz × 0.128 = 0.128 mg/gal
1 microgram per fluid ounce = 0.128 milligrams per gallon.
Real-world example
1,000 ug/fl oz × 0.128 = 128 mg/gal
1,000 micrograms per fluid ounce = 128 milligrams per gallon.
Conversion table
| Microgram per Fluid ounce (ug/fl oz) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.1 ug/fl oz | 0.0128 mg/gal |
| 1 ug/fl oz | 0.128 mg/gal |
| 10 ug/fl oz | 1.28 mg/gal |
| 100 ug/fl oz | 12.8 mg/gal |
| 1,000 ug/fl oz | 128 mg/gal |
| 10,000 ug/fl oz | 1,280 mg/gal |
Reverse conversion: Milligram per Gallon to Microgram per Fluid ounce
0.128 mg/gal × 7.8125 = 1 ug/fl oz
0.128 milligrams per gallon = 1 micrograms per fluid ounce.
micrograms per fluid ounce = milligrams per gallon × 7.8125
For a page dedicated to this direction, see Milligram per Gallon to Microgram per Fluid ounce.
Understanding the Microgram per Fluid ounce (ug/fl oz)
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 microgram per fluid ounce?
1 microgram per fluid ounce equals 0.128 milligrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per fluid ounce to milligram per gallon?
Multiply the microgram per fluid ounce value by 0.128. The converter above does this instantly to whatever precision you set.
How do I convert milligram per gallon back to microgram per fluid ounce?
Use the reverse factor: 1 milligram per gallon equals 7.8125 micrograms per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per fluid ounce?
Microgram per Fluid ounce (ug/fl oz) is a unit of density.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of density.
Is the microgram per fluid ounce to milligram per gallon conversion exact?
Yes. Both microgram per fluid ounce and milligram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.128 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.