gal × 3.785411784 = L
One US gallon equals 3.785411784 liters.Conversion lab / volume
US Gallons to Liters Converter
Convert US liquid gallons to liters using the exact US gallon definition.
US Gallons to Liters Converter: 1 US gallon = 3.78541178 liters. To convert any amount, multiply the number of US gallons by 3.78541178. TOEA calculates with the full stored factor (gal × 3.785411784 = L) and keeps the calculation in your browser. Runs 100% locally in your browser with zero server file uploads.
- Category
- Unit converters
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Result / live
3.78541178
Lliters
1 gal3.78541178 L
2 gal7.57082357 L
5 gal18.92705892 L
10 gal37.85411784 L
20 gal75.70823568 L
US gallons to liters conversion table
| US gallons (gal) | liters (L) |
|---|---|
| 1 gal | 3.785412 L |
| 2 gal | 7.570824 L |
| 3 gal | 11.35624 L |
| 4 gal | 15.14165 L |
| 5 gal | 18.92706 L |
| 6 gal | 22.71247 L |
| 7 gal | 26.49788 L |
| 8 gal | 30.28329 L |
| 9 gal | 34.06871 L |
| 10 gal | 37.85412 L |
| 15 gal | 56.78118 L |
| US gallons (gal) | liters (L) |
|---|---|
| 20 gal | 75.70824 L |
| 25 gal | 94.63529 L |
| 30 gal | 113.5624 L |
| 40 gal | 151.4165 L |
| 50 gal | 189.2706 L |
| 75 gal | 283.9059 L |
| 100 gal | 378.5412 L |
| 250 gal | 946.3529 L |
| 500 gal | 1,892.706 L |
| 1,000 gal | 3,785.412 L |
Rounded to seven significant digits; the converter above uses the full factor.
Worked examples
Multiply the number of US gallons by 3.785411784:
2 gal × 3.785411784 = 7.570824 L5 gal × 3.785411784 = 18.92706 L10 gal × 3.785411784 = 37.85412 L
How to use it
- Enter the number of US gallons you want to convert.
- Read the liters result as it updates.
- Copy the result or open the reverse conversion.
Privacy & limitations
Your value never leaves this browser. JavaScript floating-point arithmetic can round the last displayed digit for very large or highly precise values; do not use this general utility where regulated measurement traceability is required.
Related tools
Frequently asked questions
What formula converts US gallons to liters?
gal × 3.785411784 = L. The result is displayed with up to 8 decimal places without changing the underlying calculation.
How many liters is 20 gal?
20 gal = 75.70824 L. Multiply 20 by 3.78541178 to get it, or find it in the conversion table.
How do I convert liters back to US gallons?
Divide by 3.78541178, or open the reverse converter, which uses the exact reciprocal of the same factor.
Can I enter zero, decimals, or negative values?
Yes. The engine handles finite positive, zero, decimal, and negative numbers. Whether a negative measurement is meaningful depends on your use case.
Is this conversion performed online?
The page is online, but the number you type is converted locally in your browser and is not sent to TOEA.
Embed this tool
Free to use on any website. Paste the code where the tool should appear; the link under it lets readers open the full page.
<iframe src="https://toea.com/embed/gallons-to-liters" title="US Gallons to Liters Converter" width="100%" height="500" style="border:0;max-width:680px" loading="lazy"></iframe>
<p style="margin:4px 0 16px;font-size:13px"><a href="https://toea.com/gallons-to-liters">US Gallons to Liters Converter</a> · TOEA</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://toea.com"||!e.data||e.data.type!=="toea-embed-height")return;document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.height+"px"})})</script>Free tool · runs in your browser · no account required