Approximate mg/L in water.
Parts per million water to Ounces per Gallon Converter — ppm to oz/gal
Convert Parts per million water (ppm) to Ounce per Gallon (oz/gal) using the exact conversion factor (1 parts per million water = 0.0001335265 ounce per gallon). See the formula, worked examples, conversion table, and common uses.
Parts per million water to Ounces 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 0.001 / 7.489151707.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Parts per million water to Ounces per Gallon
Parts per million water and Ounce 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. Specifically: Approximate mg/L in water, and mass concentration.
Formula
ounces per gallon = parts per million water × 0.000133526471232
This factor comes from each unit's defined relationship to the category's base unit: 1 parts per million water equals 0.001 base units, and 1 ounce per gallon equals 7.48915170731 base units, so dividing one by the other gives the direct parts per million water-to-ounce per gallon factor of 0.000133526471232.
Simple example
1 ppm × 0.0001335264712 = 0.0001335265 oz/gal
1 parts per million water = 0.0001335265 ounces per gallon.
Real-world example
100 ppm × 0.0001335264712 = 0.0133526471 oz/gal
100 parts per million water = 0.0133526471 ounces per gallon.
Conversion table
| Parts per million water (ppm) | Ounce per Gallon (oz/gal) |
|---|---|
| 0.001 ppm | 1.335265e-7 oz/gal |
| 0.01 ppm | 0.0000013353 oz/gal |
| 0.1 ppm | 0.0000133526 oz/gal |
| 1 ppm | 0.0001335265 oz/gal |
| 10 ppm | 0.0013352647 oz/gal |
| 100 ppm | 0.0133526471 oz/gal |
Reverse conversion: Ounce per Gallon to Parts per million water
0.0001335265 oz/gal × 7489.151707 = 1.000000215 ppm
0.0001335265 ounces per gallon = 1.000000215 parts per million water.
parts per million water = ounces per gallon × 7489.15170731
For a page dedicated to this direction, see Ounce per Gallon to Parts per million water.
Understanding the Parts per million water (ppm)
Approximate mg/L in water.
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
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 ounces per gallon are in 1 parts per million water?
1 parts per million water equals 0.0001335265 ounces per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert parts per million water to ounce per gallon?
Multiply the parts per million water value by 0.0001335264712. The converter above does this instantly to whatever precision you set.
How do I convert ounce per gallon back to parts per million water?
Use the reverse factor: 1 ounce per gallon equals 7,489.151707 parts per million water. You can also use the swap control in the converter above to flip the direction instantly.
What is a parts per million water?
Parts per million water (ppm) is a unit of chemistry.
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.
Is the parts per million water to ounce per gallon conversion exact?
Yes. Both parts per million water and ounce per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.0001335264712 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.