Gallon (US) to Liter (US gal to L)
Result
3.785411784 Liter
Formula
L = US gal × 3.785411784
1 US gal = 3.785411784 L, and 1 L = 0.2641720524 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 × 3.785411784 = 3.7854118 L
- 5 US gal × 3.785411784 = 18.927059 L
- 15 US gal × 3.785411784 = 56.781177 L
- 55 US gal × 3.785411784 = 208.19765 L
Things to know about US gal to L
- Multiply by 3.785411784 (exact). A standard 55-gallon drum holds 208.2 L.
- If the gallons are imperial (UK, older Canadian figures), multiply by 4.54609 instead.
Gallon (US) to Liter table
| Gallon (US) (US gal) | Liter (L) |
|---|---|
| 1 | 3.7854118 |
| 2 | 7.5708236 |
| 5 | 18.927059 |
| 10 | 37.854118 |
| 15 | 56.781177 |
| 20 | 75.708236 |
| 50 | 189.27059 |
| 55 | 208.19765 |
| 100 | 378.54118 |
| 1,000 | 3,785.4118 |
The units
- Gallon (US) (US gal)
- The US liquid gallon: 231 cubic inches, exactly 3.785411784 L.
- Liter (L)
- Exactly one cubic decimetre (0.001 m³).
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