Gallons to Litres Converter
Convert US gallons to litres instantly. 1 US gal equals 3.785412 L. This page uses the US gallon (3.785411784 L) — the UK gallon is larger, at 4.54609 L. Use the converter above, or the formula, worked example and table below for common volumes.
Live formula: 1 gallon → l
See all Volume & Capacity Converter conversions →
How to Use the Gallons to Litres Converter
- 1. Enter a value in the left input field — the converter is already set to Gallon (US) to Liter (L).
- 2. Read the instant converted value and review the live formula line.
- 3. Use the swap button to reverse the direction, or copy either amount.
- 4. Check the table below for common gallons to litres conversions.
Gallons to Litres Converter Formula
litres = US gallons × 3.785411784
Worked example: 10 US gal × 3.785411784 = 37.8541 L
Gallon (US) to Liter (L) Conversion Table
| From Unit | To Unit | Input | Result |
|---|---|---|---|
| Gallon (US) | Liter (L) | 0.5 | 1.892706 |
| Gallon (US) | Liter (L) | 1 | 3.785412 |
| Gallon (US) | Liter (L) | 2 | 7.570824 |
| Gallon (US) | Liter (L) | 5 | 18.927059 |
| Gallon (US) | Liter (L) | 10 | 37.854118 |
| Gallon (US) | Liter (L) | 20 | 75.708236 |
| Gallon (US) | Liter (L) | 50 | 189.270589 |
| Gallon (US) | Liter (L) | 100 | 378.541178 |
Did You Know?
- This converter uses the US gallon: 1 US gal = 3.785411784 L. The UK gallon is 4.54609 L, about 20% larger.
- A US gallon of water weighs about 8.34 lb; a UK gallon weighs about 10.02 lb.
Frequently Asked Questions
How many litres is 1 gallon?
1 US gallon equals 3.785412 litres. A UK gallon is larger — 4.54609 litres. This converter uses the US gallon.
How do I convert gallons to litres?
Multiply US gallons by 3.7854 — for example, 5 US gal × 3.7854 ≈ 18.93 L.
What is 5 gallons in litres?
5 US gallons equals 18.93 litres (5 × 3.785411784 = 18.9271 L).
Which gallon does this converter use?
The US gallon (3.785411784 litres). The UK gallon is 4.54609 litres — about 20% larger — so always check which gallon a recipe or fuel figure means.