Milliliters to Gallons Converter
Enter the volume in milliliters below to convert it to gallons.
Convert Milliliters to Gallons (US)
Enter a value in milliliters (mL) to convert to gallons (us) (gal (US)).
Milliliter to Gallon Conversion Table
Table showing various milliliter measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Milliliters (mL) | Gallons (US) (gal (US)) |
|---|---|
| 1 mL | 0.000264172 gal (US) |
| 2 mL | 0.000528344 gal (US) |
| 2.5 mL | 0.00066043 gal (US) |
| 5 mL | 0.0013209 gal (US) |
| 10 mL | 0.0026417 gal (US) |
| 15 mL | 0.0039626 gal (US) |
| 20 mL | 0.0052834 gal (US) |
| 25 mL | 0.0066043 gal (US) |
| 30 mL | 0.0079252 gal (US) |
| 50 mL | 0.0132086 gal (US) |
How to Convert Milliliters to Gallons
To convert milliliters to gallons, multiply the volume by the following conversion ratio: 0.000264172 gallons/milliliter.
Since one milliliter is equal to 0.000264172 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in milliliters multiplied by 0.000264172.
For example, here's how to convert 5 milliliters to gallons using the formula above.
How Many Gallons Are in a Milliliter?
There are 0.000264172 gallons in a milliliter, which is why we use this value in the formula above.
Our milliliter to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliliters and gallons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Milliliter?
A milliliter is a unit of volume equal to 1/1,000 of a liter (0.001 L). One-thousandth of a liter, identical to 1 cubic centimeter (cc). [1]
The milliliter is classified as a metric and SI-compatible unit of volume. Milliliters can be abbreviated as mL; for example, 1 milliliter can be written as 1 mL.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliliter (mL) a convenient decimal multiple of the liter (L).
In practice, milliliters (mL) are widely used across fine-tolerance laboratory, analytical, and micro-scale volume measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Gallon?
A gallon is a unit of volume equal to 3.7854118 liters (L), the base unit for volume. US liquid gallon defined as exactly 231 cubic inches (3.78541 L). [2]
The gallon is classified as a US customary unit of volume. Gallons can be abbreviated as gal (US); for example, 1 gallon can be written as 1 gal (US).
When working with gallons (gal (US)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gallons (gal (US)) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
When converting volume between milliliters (mL) and gallons (gal (US)), keep full floating-point precision (1 mL = 0.000264172 gal (US); 1 gal (US) = 3,785.411784 mL) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Milliliter & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to milliliters calculator to switch your starting unit immediately. You can also explore related tools such as converting gallons (us) to milliliters, converting liters to gallons (us), or converting quarts (us) to gallons (us).
Convert from Milliliters
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Milliliters (mL) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Milliliter (mL) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (mL to gal (US))