Gallon (US) to Milliliter (US gal to mL)
Result
3,785.411784 Milliliter
Formula
mL = US gal × 3,785.411784
1 US gal = 3,785.411784 mL, and 1 mL = 0.000264172052 US gal.
The litre is exactly 1 dm³ (0.001 m³). The US gallon is defined as 231 cubic inches, which makes it exactly 3.785411784 L; quarts, pints, cups and fluid ounces are fixed fractions of it.
Worked examples
- 1 US gal × 3,785.411784 = 3,785.4118 mL
- 10 US gal × 3,785.411784 = 37,854.118 mL
- 100 US gal × 3,785.411784 = 378,541.18 mL
Common mistakes
- US and UK (imperial) measures share names but not sizes: the imperial gallon is 4.54609 L (20% larger), the imperial pint 568 mL and the imperial fluid ounce 28.41 mL.
- This converter uses US customary volumes. A US cup is 236.59 mL, a metric cup 250 mL, and US nutrition labels round a cup to 240 mL.
- US dry measures (dry pint, bushel) are a separate system and are not the same as liquid pints.
Gallon (US) to Milliliter table
| Gallon (US) (US gal) | Milliliter (mL) |
|---|---|
| 1 | 3,785.4118 |
| 2 | 7,570.8236 |
| 5 | 18,927.059 |
| 10 | 37,854.118 |
| 20 | 75,708.236 |
| 50 | 189,270.59 |
| 100 | 378,541.18 |
| 1,000 | 3,785,411.8 |
The units
- Gallon (US) (US gal)
- The US liquid gallon: 231 cubic inches, exactly 3.785411784 L.
- Milliliter (mL)
- One thousandth of a litre — the same volume as one cubic centimetre.
Sources for these factors
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- 21 CFR 101.9 (nutrition labeling: household measure equivalents) — U.S. FDA / eCFR
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy