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Volume
Milliliters to Gallons
Convert milliliters (mL) to gallons (gal). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 mL = 0.000264 gal
Milliliters to Gallons Conversion Table
Common values, ready to copy:
| milliliters | gallons |
|---|---|
| 1 mL | 0.000264 gal |
| 2 mL | 0.000528 gal |
| 5 mL | 0.001321 gal |
| 10 mL | 0.002642 gal |
| 25 mL | 0.006604 gal |
| 50 mL | 0.013209 gal |
| 100 mL | 0.026417 gal |
| 1,000 mL | 0.264172 gal |
Formula
gallons = milliliters × 2.64172177e-4
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
About Milliliters and Gallons
Milliliters (mL): One thousandth of a liter, where the liter is defined as one cubic decimeter; not strictly an SI unit (the SI volume unit is the cubic meter) but universal in cooking, medicine, and chemistry. Common uses: Liquid medication dosing, lab work, cooking (especially in metric countries), bartending, and any small-volume liquid measurement.
Gallons (gal): The US gallon (3.785 L) descends from Queen Anne's 1707 wine gallon; the UK switched to a larger imperial gallon (4.546 L) in 1824, but the US kept the original definition. Common uses: US fuel sales, US milk packaging, lawn and garden chemicals, swimming pool volumes, and aquariums.
How the conversion works
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
The exact relationship is gallons = milliliters × 2.64172177e-4, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between milliliters and gallons comes up wherever volume measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.