Mass concentration.
Grams per Cubic Meter to Grams per Gallon Converter — g/m3 to g/gal
Convert Gram per Cubic Meter (g/m3) to Gram per Gallon (g/gal) using the exact conversion factor (1 gram per cubic meter = 0.0037854118 gram per gallon). See the formula, worked examples, and conversion table.
Grams per Cubic Meter 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 0.001 / 0.2641720524.
Mass Concentration units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Cubic Meter to Grams per Gallon
Gram per Cubic Meter 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 cubic meter × 0.003785411784
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cubic meter equals 0.001 base units, and 1 gram per gallon equals 0.264172052358 base units, so dividing one by the other gives the direct gram per cubic meter-to-gram per gallon factor of 0.003785411784.
Simple example
1 g/m3 × 0.003785411784 = 0.0037854118 g/gal
1 gram per cubic meter = 0.0037854118 grams per gallon.
Real-world example
100 g/m3 × 0.003785411784 = 0.3785411784 g/gal
100 grams per cubic meter = 0.3785411784 grams per gallon.
Conversion table
| Gram per Cubic Meter (g/m3) | Gram per Gallon (g/gal) |
|---|---|
| 0.001 g/m3 | 0.0000037854 g/gal |
| 0.01 g/m3 | 0.0000378541 g/gal |
| 0.1 g/m3 | 0.0003785412 g/gal |
| 1 g/m3 | 0.0037854118 g/gal |
| 10 g/m3 | 0.0378541178 g/gal |
| 100 g/m3 | 0.3785411784 g/gal |
Reverse conversion: Gram per Gallon to Gram per Cubic Meter
0.0037854118 g/gal × 264.1720524 = 1.000000004 g/m3
0.0037854118 grams per gallon = 1.000000004 grams per cubic meter.
grams per cubic meter = grams per gallon × 264.172052358
For a page dedicated to this direction, see Gram per Gallon to Gram per Cubic Meter.
Understanding the Gram per Cubic Meter (g/m3)
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 cubic meter?
1 gram per cubic meter equals 0.0037854118 grams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cubic meter to gram per gallon?
Multiply the gram per cubic meter value by 0.003785411784. The converter above does this instantly to whatever precision you set.
How do I convert gram per gallon back to gram per cubic meter?
Use the reverse factor: 1 gram per gallon equals 264.1720524 grams per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per cubic meter?
Gram per Cubic Meter (g/m3) 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 cubic meter to gram per gallon conversion exact?
Yes. Both gram per cubic meter and gram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.003785411784 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.