Gallon (US) to Liter Converter
Volume · unit-converter
Convert Gallon (US) to Liter with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (US) (gal)
To: Liter (l)
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
About Liter
The liter is a metric unit equal to one cubic decimeter (0.001 m³). Science, global food labeling, and most countries’ everyday volumes use liters.
How to convert gallons (us) to liters
1 gallon (us) is equal to 3.78541178 liter:
1 gal = (3.78541178 L ÷ 1 L) l = 3.78541178 l
1 US liquid gallon = 231 cubic inches, defined in liters here as 3.78541178 L.
Each gallon (us) is defined as 3.78541178 L and each liter as 1 L, so one gal equals 3.78541178 ÷ 1 l = 3.78541178 l.
Let V(gal) be the numeric value of the same volume measured in Gallon (US) (gal), and V(l) the value in Liter (l). Then:
V(l) = V(gal) × (3.78541178 / 1)
Equivalently, divide by how many gal fit into one l (liters per l divided by liters per gal):
V(l) = V(gal) ÷ 0.2641720526373
Or: liter = gallon (us) ÷ 0.2641720526373
Examples
Example #1: Convert 20 gal to liter
20 gal = 20 gal × (3.78541178/1) l = 75.7082356 l
20 gal = 20 gal ÷ 0.2641720526373 = 75.7082356 l
Example #2: Convert 50 gal to liter
50 gal = 50 gal × (3.78541178/1) l = 189.270589 l
50 gal = 50 gal ÷ 0.2641720526373 = 189.270589 l
Summary
To convert Gallon (US) to Liter, multiply the value in gal by the ratio of liters per gal divided by liters per l. Equivalently: value_l = value_gal × (3.78541178 / 1). Numerically, 1 gal equals 3.78541178 l.
Relationship context
You are converting between US customary fluid / volume (Gallons (US)) and metric (SI) (Liters). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 3.785412e+0.
Conversion tables
| Gallon (US) (gal) | Liter (l) |
|---|---|
| 0.1 | 0.378541178 |
| 1 | 3.78541178 |
| 2 | 7.57082356 |
| 3 | 11.35623534 |
| 4 | 15.14164712 |
| 5 | 18.9270589 |
| 6 | 22.71247068 |
| 7 | 26.49788246 |
| 8 | 30.28329424 |
| 9 | 34.06870602 |
| Gallon (US) (gal) | Liter (l) |
|---|---|
| 10 | 37.8541178 |
| 20 | 75.7082356 |
| 30 | 113.5623534 |
| 40 | 151.4164712 |
| 50 | 189.270589 |
| 60 | 227.1247068 |
| 70 | 264.9788246 |
| 80 | 302.8329424 |
| 90 | 340.6870602 |
| 100 | 378.541178 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- us-gallon to uk-gallonGallon (US) to Gallon (UK)
- us-gallon to uk-quartGallon (US) to Quart (UK)
- us-gallon to uk-pintGallon (US) to Pint (UK)
- us-gallon to us-quartGallon (US) to Quart (US)
- us-gallon to us-pintGallon (US) to Pint (US)
- us-gallon to uk-cupGallon (US) to Cup (UK)
- us-gallon to us-cupGallon (US) to Cup (US)
- us-gallon to uk-fluid-ounceGallon (US) to Fluid Ounce (UK)
- us-gallon to uk-tablespoonGallon (US) to Tablespoon (UK)
- us-gallon to uk-teaspoonGallon (US) to Teaspoon (UK)
- uk-gallon to literGallon (UK) to Liter
- uk-quart to literQuart (UK) to Liter