Us Gallons to Liters
A US gallon is 3.785 liters, the standard unit for fuel and milk sold by volume in the US. The liter is the standard metric unit of volume, used worldwide for beverages, fuel, and everyday liquid measures. 1 gal equals ≈3.78541 L, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to volume, measured here against volume's base unit (L) — every other volume unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
L = gal × ≈3.78541
gal = L × ≈0.264172
Worked example: 5 gal × ≈3.78541 = ≈18.9271 L.
Conversion table
| Gallon (US) (gal) | Liter (L) |
|---|---|
| 1 gal | ≈3.78541 L |
| 2 gal | ≈7.57082 L |
| 3 gal | ≈11.3562 L |
| 5 gal | ≈18.9271 L |
| 10 gal | ≈37.8541 L |
| 20 gal | ≈75.7082 L |
| 25 gal | ≈94.6353 L |
| 50 gal | ≈189.271 L |
| 100 gal | ≈378.541 L |
| 250 gal | ≈946.353 L |
| 500 gal | ≈1,892.71 L |
| 1,000 gal | ≈3,785.41 L |
Frequently asked
- How many Liters in a gallon (us)?
- 1 gal equals ≈3.78541 L.
- How do I convert Gallons (US) to Liters?
- Multiply the value in gal by ≈3.78541 to get L. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Gallon (US) and Liter are both defined by a fixed conversion factor to volume's base unit (L), so the result shown is exact to the precision displayed, not an approximation.