Mass concentration.
Milligrams per Gallon to Micrograms per Fluid ounce Converter — mg/gal to ug/fl oz
Convert Milligram per Gallon (mg/gal) to Microgram per Fluid ounce (ug/fl oz) using the exact conversion factor (1 milligram per gallon = 7.8125 microgram per fluid ounce). See the formula, worked examples, and conversion table.
Milligrams per Gallon to Micrograms per Fluid ounce 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 0.0002641720524 / 3.38140227e-5.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Gallon to Micrograms per Fluid ounce
Milligram per Gallon and Microgram per Fluid ounce 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
micrograms per fluid ounce = milligrams per gallon × 7.8125
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per gallon equals 0.000264172052358 base units, and 1 microgram per fluid ounce equals 0.0000338140227018 base units, so dividing one by the other gives the direct milligram per gallon-to-microgram per fluid ounce factor of 7.8125.
Simple example
1 mg/gal × 7.8125 = 7.8125 ug/fl oz
1 milligram per gallon = 7.8125 micrograms per fluid ounce.
Real-world example
100 mg/gal × 7.8125 = 781.25 ug/fl oz
100 milligrams per gallon = 781.25 micrograms per fluid ounce.
Conversion table
| Milligram per Gallon (mg/gal) | Microgram per Fluid ounce (ug/fl oz) |
|---|---|
| 0.001 mg/gal | 0.0078125 ug/fl oz |
| 0.01 mg/gal | 0.078125 ug/fl oz |
| 0.1 mg/gal | 0.78125 ug/fl oz |
| 1 mg/gal | 7.8125 ug/fl oz |
| 10 mg/gal | 78.125 ug/fl oz |
| 100 mg/gal | 781.25 ug/fl oz |
Reverse conversion: Microgram per Fluid ounce to Milligram per Gallon
7.8125 ug/fl oz × 0.128 = 1 mg/gal
7.8125 micrograms per fluid ounce = 1 milligrams per gallon.
milligrams per gallon = micrograms per fluid ounce × 0.128
For a page dedicated to this direction, see Microgram per Fluid ounce to Milligram per Gallon.
Understanding the Milligram per Gallon (mg/gal)
Mass concentration.
Understanding the Microgram per Fluid ounce (ug/fl oz)
Mass concentration.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per fluid ounce are in 1 milligram per gallon?
1 milligram per gallon equals 7.8125 micrograms per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per gallon to microgram per fluid ounce?
Multiply the milligram per gallon value by 7.8125. The converter above does this instantly to whatever precision you set.
How do I convert microgram per fluid ounce back to milligram per gallon?
Use the reverse factor: 1 microgram per fluid ounce equals 0.128 milligrams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of chemistry.
What is a microgram per fluid ounce?
Microgram per Fluid ounce (ug/fl oz) is a unit of chemistry.
Is the milligram per gallon to microgram per fluid ounce conversion exact?
Yes. Both milligram per gallon and microgram per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 7.8125 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.