Mass concentration.
Ounces per Gallon to Parts per million water Converter — oz/gal to ppm
Convert Ounce per Gallon (oz/gal) to Parts per million water (ppm) using the exact conversion factor (1 ounce per gallon = 7,489.151707 parts per million water). See the formula, worked examples, conversion table, and common uses.
Ounces per Gallon to Parts per million water 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.
Approximate mg/L in water.
Result = input x 7.489151707 / 0.001.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Gallon to Parts per million water
Ounce per Gallon and Parts per million water 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. 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
parts per million water = ounces per gallon × 7489.15170731
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 parts per million water equals 0.001 base units, so dividing one by the other gives the direct ounce per gallon-to-parts per million water factor of 7489.15170731.
Simple example
1 oz/gal × 7489.151707 = 7,489.151707 ppm
1 ounce per gallon = 7,489.151707 parts per million water.
Real-world example
100 oz/gal × 7489.151707 = 748,915.1707 ppm
100 ounces per gallon = 748,915.1707 parts per million water.
Conversion table
| Ounce per Gallon (oz/gal) | Parts per million water (ppm) |
|---|---|
| 0.001 oz/gal | 7.489151707 ppm |
| 0.01 oz/gal | 74.89151707 ppm |
| 0.1 oz/gal | 748.9151707 ppm |
| 1 oz/gal | 7,489.151707 ppm |
| 10 oz/gal | 74,891.51707 ppm |
| 100 oz/gal | 748,915.1707 ppm |
Reverse conversion: Parts per million water to Ounce per Gallon
1 ppm × 0.0001335264712 = 0.0001335265 oz/gal
1 parts per million water = 0.0001335265 ounces per gallon.
ounces per gallon = parts per million water × 0.000133526471232
For a page dedicated to this direction, see Parts per million water 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 Parts per million water (ppm)
Approximate mg/L in water.
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 parts per million water are in 1 ounce per gallon?
1 ounce per gallon equals 7,489.151707 parts per million water, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per gallon to parts per million water?
Multiply the ounce per gallon value by 7489.151707. The converter above does this instantly to whatever precision you set.
How do I convert parts per million water back to ounce per gallon?
Use the reverse factor: 1 parts per million water equals 0.0001335265 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 parts per million water?
Parts per million water (ppm) is a unit of chemistry.
Is the ounce per gallon to parts per million water conversion exact?
Yes. Both ounce per gallon and parts per million water are defined by fixed standards rather than physical artifacts, so the factor of 7489.151707 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 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.