Gallon (US) to Liter
1 gal = 3.78541 L
Convert Gallon (US) (gal) to Liter (L) with engineering-grade precision. Instant results, formula, and reference table below.
1 Gallon (US) ≈3.785411784 Liter
How to convert Gallon (US) to Liter (gal to L)
Converting Gallon (US)s to Liters is critical for developers working with international data standards or scientific applications. This tool performs the calculation entirely on your client (browser) using JavaScript/WASM, ensuring zero latency and maximum privacy.
The Formula
1 gal = 3.78541 L
Calculation Example
Let's say you want to convert 5 gal to L:
- Input: 5 gal
- Calculation: 5 × 3.78541
- Result: 18.9271 L
About the Gallon (US) to Liter conversion
The conversion factor from Gallon (US) (gal) to Liter (L) is 3.78541, meaning 1 gal = 3.78541 L and inversely 1 L = 0.26417 gal. That makes the Gallon (US) the larger of the two units in the volume category, where the SI base unit is the liter. Every ratio here is derived from the SI/international definition rather than a rounded approximation, so results are stable across repeated conversions.
Need the reverse? Use the Liter to Gallon (US) converter.
Frequently Asked Questions
How do I convert Gallon (US) to Liter?
To convert Gallon (US) to Liter, you need to multiply the gal value by 3.78541.
What is the formula for gal to L?
The simple formula is: L = gal × 3.78541.
Which is bigger: Gallon (US) or Liter?
A Gallon (US) is bigger. One Gallon (US) is equal to approx 3.7854 Liters.
How many Gallon (US)s are in one Liter?
There are approximately 0.264172 Gallon (US)s in one Liter.
Quick Conversion Table
| gal | L |
|---|---|
| 1 | 3.7854 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 50 | 189.2706 |
| 100 | 378.5412 |