conversions
Gallons to Liters
Last updated: May 31, 2026
Written by Blake Boege
A volume conversion utility translating US liquid gallons (gal) into metric liters (L). One US liquid gallon is defined as exactly 3.785411784 liters.
Convert gallons to liters instantly. Read the conversion answers, the mathematical formula, and browse the reference lookup table.
Quick Answer
Convert gallons to liters. For example, 1 US gallon is exactly 3.79 liters.
Gallons to Liters
Bidirectional Gallons and Liters Converter
Compute exact conversions using standard standard parameters.
Bidirectional live updates. Enter a number in either field to convert instantly.
Answer
3.79 L
1 gal = 3.79 L
Gallons to Liters Reference Table
| Gallons (gal) | Liters (L) | Description |
|---|---|---|
| 0.26 gal | 1.00 L | Exactly one liter |
| 1 gal | 3.79 L | Exactly one standard US gallon |
| 2 gal | 7.57 L | Two gallons benchmark |
| 5 gal | 18.93 L | Standard water cooler jug |
| 10 gal | 37.85 L | Ten gallons benchmark |
| 15 gal | 56.78 L | Standard water heater capacity |
| 50 gal | 189.27 L | Typical large storage drum |
Examples
1 gal
3.79 L
How it works
To convert gallons (gal) to liters (L), perform the following calculation:
Formula
L = gal × 3.78541
Method
Multiply gallons by 3.78541 to get liters.
Understanding Gallons and Liters Conversions
Converting measurements between metric and imperial scales, or relative temperature benchmarks, is essential in sciences, logistics, cooking, and daily travel. Using standard multipliers guarantees precision and alignment across different measurement systems.
Related Conversion & Metric Calculators
Explore other related converters on our site:
Related Calculators
More tools from Conversions
Frequently asked questions
Multiply the gallons value by 3.78541. For example, 5 gallons = 5 × 3.78541 = 18.93 liters.
A standard US liquid gallon contains exactly 3.79 liters, while an Imperial (UK) gallon is exactly 4.54609 liters.
For a quick estimate, multiply the gallons value by 3.8.
Related calculators
Conversions
How Many Ounces in a Gallon
Find out exactly how many fluid ounces are in a gallon. Use our quick converter to switch between gallons and ounces using either US customary or Imperial measurements.
Conversions
How Many Seconds in a Day
Calculate exact time intervals. Convert between days, hours, minutes, and seconds instantly, and learn the math behind standard calendar day calculations.
Conversions
How Many Quarts in a Gallon
Learn the relationship between quarts and gallons. Convert gallons to quarts and vice versa, and explore the volume differences between US and Imperial liquid systems.