Mass concentration.
Grams per Gallon to Parts per billion water Converter — g/gal to ppb
Convert Gram per Gallon (g/gal) to Parts per billion water (ppb) using the exact conversion factor (1 gram per gallon = 264,172.0524 parts per billion water). See the formula, worked examples, and conversion table.
Grams per Gallon to Parts per billion 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 ug/L in water.
Result = input x 0.2641720524 / 1e-6.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Gallon to Parts per billion water
Gram per Gallon and Parts per billion 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. Specifically: Mass concentration, and approximate ug/L in water.
Formula
parts per billion water = grams per gallon × 264172.052358
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per gallon equals 0.264172052358 base units, and 1 parts per billion water equals 0.000001 base units, so dividing one by the other gives the direct gram per gallon-to-parts per billion water factor of 264172.052358.
Simple example
1 g/gal × 264172.0524 = 264,172.0524 ppb
1 gram per gallon = 264,172.0524 parts per billion water.
Real-world example
100 g/gal × 264172.0524 = 26,417,205.24 ppb
100 grams per gallon = 26,417,205.24 parts per billion water.
Conversion table
| Gram per Gallon (g/gal) | Parts per billion water (ppb) |
|---|---|
| 0.001 g/gal | 264.1720524 ppb |
| 0.01 g/gal | 2,641.720524 ppb |
| 0.1 g/gal | 26,417.20524 ppb |
| 1 g/gal | 264,172.0524 ppb |
| 10 g/gal | 2,641,720.524 ppb |
| 100 g/gal | 26,417,205.24 ppb |
Reverse conversion: Parts per billion water to Gram per Gallon
1 ppb × 0.000003785411784 = 0.0000037854 g/gal
1 parts per billion water = 0.0000037854 grams per gallon.
grams per gallon = parts per billion water × 0.000003785411784
For a page dedicated to this direction, see Parts per billion water to Gram per Gallon.
Understanding the Gram per Gallon (g/gal)
Mass concentration.
Understanding the Parts per billion water (ppb)
Approximate ug/L in water.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many parts per billion water are in 1 gram per gallon?
1 gram per gallon equals 264,172.0524 parts per billion water, using the exact defined conversion factor rather than an estimate.
How do I convert gram per gallon to parts per billion water?
Multiply the gram per gallon value by 264172.0524. The converter above does this instantly to whatever precision you set.
How do I convert parts per billion water back to gram per gallon?
Use the reverse factor: 1 parts per billion water equals 0.0000037854 grams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per gallon?
Gram per Gallon (g/gal) is a unit of chemistry.
What is a parts per billion water?
Parts per billion water (ppb) is a unit of chemistry.
Is the gram per gallon to parts per billion water conversion exact?
Yes. Both gram per gallon and parts per billion water are defined by fixed standards rather than physical artifacts, so the factor of 264172.0524 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.