Volume converter
US Gallons to Liters
Converting US Gallons to Liters is a single multiplication when you know the factor. One gal equals 3.785412 L, so multiply the value in gal by 3.785412. The calculator below works in both directions and accepts decimals.
Formula 1 gal = 3.785412 L
Need the other direction? Liters to US Gallons.
How to convert US Gallons to Liters
The US liquid gallon is 3.785411784 litres, about 3.79 litres. The litre is one thousandth of a cubic metre, or 1,000 millilitres.
To convert US Gallons to Liters, multiply the value in gal by 3.785412. For example, 10 gal × 3.785412 = 37.854118 L. This works because the ratio between the two units is constant for every value in volume.
Worked examples
| gal | L |
|---|---|
| 1 gal | 3.785412 L |
| 2.5 gal | 9.463529 L |
| 5 gal | 18.927059 L |
| 10 gal | 37.854118 L |
| 25 gal | 94.635295 L |
| 50 gal | 189.270589 L |
| 100 gal | 378.541178 L |
Reverse conversion
| L | gal |
|---|---|
| 1 L | 0.26417205 gal |
| 5 L | 1.32086 gal |
| 10 L | 2.641721 gal |
| 25 L | 6.604301 gal |
| 50 L | 13.208603 gal |
| 100 L | 26.417205 gal |
When this conversion is useful
This is the calculation you need when you are cooking, dosing a liquid or planning a shipment and the units do not match. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 gal is 3,785.41 L.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
gal to L conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| US Gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.785412 L |
| 2 gal | 7.570824 L |
| 3 gal | 11.356235 L |
| 4 gal | 15.141647 L |
| 5 gal | 18.927059 L |
| 6 gal | 22.712471 L |
| 7 gal | 26.497882 L |
| 8 gal | 30.283294 L |
| 9 gal | 34.068706 L |
| 10 gal | 37.854118 L |
| 11 gal | 41.63953 L |
| 12 gal | 45.424941 L |
| 13 gal | 49.210353 L |
| 14 gal | 52.995765 L |
| 15 gal | 56.781177 L |
| 16 gal | 60.566589 L |
| 17 gal | 64.352 L |
| 18 gal | 68.137412 L |
| 19 gal | 71.922824 L |
| 20 gal | 75.708236 L |
| 21 gal | 79.493647 L |
| 22 gal | 83.279059 L |
| 23 gal | 87.064471 L |
| 24 gal | 90.849883 L |
| 25 gal | 94.635295 L |
| 26 gal | 98.420706 L |
| 27 gal | 102.206118 L |
| 28 gal | 105.99153 L |
| 29 gal | 109.776942 L |
| 30 gal | 113.562354 L |
| 31 gal | 117.347765 L |
| 32 gal | 121.133177 L |
| 33 gal | 124.918589 L |
| 34 gal | 128.704001 L |
| 35 gal | 132.489412 L |
| 36 gal | 136.274824 L |
| 37 gal | 140.060236 L |
| 38 gal | 143.845648 L |
| 39 gal | 147.63106 L |
| 40 gal | 151.416471 L |
| 41 gal | 155.201883 L |
| 42 gal | 158.987295 L |
| 43 gal | 162.772707 L |
| 44 gal | 166.558118 L |
| 45 gal | 170.34353 L |
| 46 gal | 174.128942 L |
| 47 gal | 177.914354 L |
| 48 gal | 181.699766 L |
| 49 gal | 185.485177 L |
| 50 gal | 189.270589 L |
| 60 gal | 227.124707 L |
| 70 gal | 264.978825 L |
| 80 gal | 302.832943 L |
| 90 gal | 340.687061 L |
| 100 gal | 378.541178 L |
Frequently asked questions
How many Liters are in 1 US Gallons?
1 gal equals 3.785412 L.
How do I convert US Gallons to Liters?
Multiply the gal value by 3.785412. Example: 25 gal = 94.635295 L.
What is 2.5 gal in L?
2.5 gal = 9.463529 L.
Is the gal to L conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.