Mass concentration.
Grams per Fluid ounce to Grams per Gallon Converter — g/fl oz to g/gal
Convert Gram per Fluid ounce (g/fl oz) to Gram per Gallon (g/gal) using the exact conversion factor (1 gram per fluid ounce = 128 gram per gallon). See the formula, worked examples, and conversion table.
Grams per Fluid ounce to Grams 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 33.8140227 / 0.2641720524.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Fluid ounce to Grams per Gallon
Gram per Fluid ounce and Gram 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. Both are mass concentration units.
Formula
grams per gallon = grams per fluid ounce × 128
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per fluid ounce equals 33.8140227018 base units, and 1 gram per gallon equals 0.264172052358 base units, so dividing one by the other gives the direct gram per fluid ounce-to-gram per gallon factor of 128.
Simple example
1 g/fl oz × 128 = 128 g/gal
1 gram per fluid ounce = 128 grams per gallon.
Real-world example
100 g/fl oz × 128 = 12,800 g/gal
100 grams per fluid ounce = 12,800 grams per gallon.
Conversion table
| Gram per Fluid ounce (g/fl oz) | Gram per Gallon (g/gal) |
|---|---|
| 0.001 g/fl oz | 0.128 g/gal |
| 0.01 g/fl oz | 1.28 g/gal |
| 0.1 g/fl oz | 12.8 g/gal |
| 1 g/fl oz | 128 g/gal |
| 10 g/fl oz | 1,280 g/gal |
| 100 g/fl oz | 12,800 g/gal |
Reverse conversion: Gram per Gallon to Gram per Fluid ounce
128 g/gal × 0.0078125 = 1 g/fl oz
128 grams per gallon = 1 gram per fluid ounce.
grams per fluid ounce = grams per gallon × 0.0078125
For a page dedicated to this direction, see Gram per Gallon to Gram per Fluid ounce.
Understanding the Gram per Fluid ounce (g/fl oz)
Mass concentration.
Understanding the Gram per Gallon (g/gal)
Mass concentration.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per gallon are in 1 gram per fluid ounce?
1 gram per fluid ounce equals 128 grams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per fluid ounce to gram per gallon?
Multiply the gram per fluid ounce value by 128. The converter above does this instantly to whatever precision you set.
How do I convert gram per gallon back to gram per fluid ounce?
Use the reverse factor: 1 gram per gallon equals 0.0078125 grams per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per fluid ounce?
Gram per Fluid ounce (g/fl oz) is a unit of chemistry.
What is a gram per gallon?
Gram per Gallon (g/gal) is a unit of chemistry.
Is the gram per fluid ounce to gram per gallon conversion exact?
Yes. Both gram per fluid ounce and gram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 128 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.