Mass per volume density.
Ounces per Gallon to Milligrams per Fluid ounce Converter — oz/gal to mg/fl oz
Convert Ounce per Gallon (oz/gal) to Milligram per Fluid ounce (mg/fl oz) using the exact conversion factor (1 ounce per gallon = 221.4806494 milligram per fluid ounce). See the formula, worked examples, conversion table, and common uses.
Ounces per Gallon to Milligrams per Fluid ounce 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 7.489151707 / 0.0338140227.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Gallon to Milligrams per Fluid ounce
Ounce per Gallon and Milligram per Fluid ounce 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. Ounce per Gallon is most often used for used to express dilution rates on many us pesticide, herbicide, and household cleaning product labels, which commonly specify a number of fluid ounces of concentrate per gallon of water.
Formula
milligrams per fluid ounce = ounces per gallon × 221.480649414
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per gallon equals 7.48915170731 base units, and 1 milligram per fluid ounce equals 0.0338140227018 base units, so dividing one by the other gives the direct ounce per gallon-to-milligram per fluid ounce factor of 221.480649414.
Simple example
1 oz/gal × 221.4806494 = 221.4806494 mg/fl oz
1 ounce per gallon = 221.4806494 milligrams per fluid ounce.
Real-world example
1,000 oz/gal × 221.4806494 = 221,480.6494 mg/fl oz
1,000 ounces per gallon = 221,480.6494 milligrams per fluid ounce.
Conversion table
| Ounce per Gallon (oz/gal) | Milligram per Fluid ounce (mg/fl oz) |
|---|---|
| 0.1 oz/gal | 22.14806494 mg/fl oz |
| 1 oz/gal | 221.4806494 mg/fl oz |
| 10 oz/gal | 2,214.806494 mg/fl oz |
| 100 oz/gal | 22,148.06494 mg/fl oz |
| 1,000 oz/gal | 221,480.6494 mg/fl oz |
| 10,000 oz/gal | 2,214,806.494 mg/fl oz |
Reverse conversion: Milligram per Fluid ounce to Ounce per Gallon
221.4806494 mg/fl oz × 0.00451506713 = 0.9999999999 oz/gal
221.4806494 milligrams per fluid ounce = 0.9999999999 ounces per gallon.
ounces per gallon = milligrams per fluid ounce × 0.00451506712955
For a page dedicated to this direction, see Milligram per Fluid ounce to Ounce per Gallon.
Understanding the Ounce per Gallon
Ounce per Gallon (oz/gal) measures concentration (dilution rate). A US customary way to express how much concentrate is mixed into each gallon of a diluted solution. It is classified as a US customary concentration unit.
Where it's used: United States
Uses of the Ounce per Gallon today
- Used to express dilution rates on many US pesticide, herbicide, and household cleaning product labels, which commonly specify a number of fluid ounces of concentrate per gallon of water
Understanding the Milligram per Fluid ounce (mg/fl oz)
Mass per volume density.
Ounce per Gallon — sources
- US product-label dilution conventions (pesticide/herbicide industry guides) — Fluid ounces of concentrate per gallon is a widely used label format for US spray and cleaning product dilution instructions.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per fluid ounce are in 1 ounce per gallon?
1 ounce per gallon equals 221.4806494 milligrams per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per gallon to milligram per fluid ounce?
Multiply the ounce per gallon value by 221.4806494. The converter above does this instantly to whatever precision you set.
How do I convert milligram per fluid ounce back to ounce per gallon?
Use the reverse factor: 1 milligram per fluid ounce equals 0.0045150671 ounces per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per gallon?
Ounce per Gallon (oz/gal) measures concentration (dilution rate). A US customary way to express how much concentrate is mixed into each gallon of a diluted solution. It is classified as a US customary concentration unit.
What is a milligram per fluid ounce?
Milligram per Fluid ounce (mg/fl oz) is a unit of density.
Is the ounce per gallon to milligram per fluid ounce conversion exact?
Yes. Both ounce per gallon and milligram per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 221.4806494 used above is exact to as many digits as you choose to display.
Where is the ounce per gallon still used today?
United States
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.