Mass concentration.
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
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 3.38140227e-5 / 0.0002641720524.
Mass Concentration units are compatible.
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 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 = 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
100 ug/fl oz × 0.128 = 12.8 mg/gal
100 micrograms per fluid ounce = 12.8 milligrams per gallon.
Conversion table
| Microgram per Fluid ounce (ug/fl oz) | Milligram per Gallon (mg/gal) |
|---|---|
| 0.001 ug/fl oz | 0.000128 mg/gal |
| 0.01 ug/fl oz | 0.00128 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 |
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 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 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 chemistry.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of chemistry.
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 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.