Gallons (US) to Liters Converter
Quick answer: To convert gallons to liters, multiply by 3.785412. For example, 10 gal is 37.85412 L. One us gallon equals 3.785412 L.
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Use the Gallons (US) to Liters Converter
Gallons (US) to Liters formula and what each symbol means
L = gal × 3.785412
| Symbol | Meaning |
|---|---|
| gal | US gallon |
| L | Liter |
Gallons (US) to Liters examples
1 gal
1 gal × 3.785412 = 3.785412 L.
10 gal
10 gal × 3.785412 = 37.85412 L.
100 gal
100 gal × 3.785412 = 378.5412 L.
Gallons (US) compared with Liters
One gal is 3.785 times as large as one L, so your number gets bigger when you convert gallons to liters and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About gallons and liters
US gallon (gal): The US liquid gallon, exactly 231 cubic inches or 3.785411784 litres. Liter (L): A cubic decimetre, accepted for use with the SI.
Where gallons to liters conversions are used
Fuel, milk and bottled drinks are sold in litres or gallons depending on the country. Tanks, pools and shipping containers are specified in cubic metres or cubic feet.
How to calculate Gallons (US) to Liters step by step
- Enter the value in gal (the starting unit).
- Multiply by 3.785412, because 1 gal = 3.785412 L.
- The product is the value in L. To go back, divide by 3.785412 or multiply by 0.2641721.
Popular volume conversions
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How to read your Gallons (US) to Liters result
Quick estimate: multiply by about 3.8 to get liters from gallons; this is within 0.4% of the exact factor. US and imperial volume units differ, so always check which gallon, pint or fluid ounce you mean.
| GALLONS (US) | LITERS |
|---|---|
| 1 | 3.785412 |
| 2 | 7.570824 |
| 5 | 18.92706 |
| 10 | 37.85412 |
| 20 | 75.70824 |
| 50 | 189.2706 |
| 100 | 378.5412 |
| 1,000 | 3,785.412 |
Liters to Gallons (US): quick table
| LITERS | GALLONS (US) |
|---|---|
| 1 | 0.2641721 |
| 5 | 1.32086 |
| 10 | 2.641721 |
| 25 | 6.604301 |
| 50 | 13.2086 |
| 100 | 26.41721 |
| 250 | 66.04301 |
| 500 | 132.086 |
Common mistakes when calculating Gallons (US) to Liters
- Confusing the US fluid ounce (about 29.57 mL) with the imperial fluid ounce (about 28.41 mL).
- Dividing when you should multiply: from gal to L multiply by 3.785412; from L to gal divide by 3.785412.
Gallons (US) to Liters FAQ
How many L are in 1 gal?
1 gal equals 3.785412 L.
How many gal are in 1 L?
1 L equals 0.2641721 gal.
Is 1 gal = 3.785412 L an exact conversion?
Yes. The us gallon and the liter are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 3.785412 is just that ratio shown to 7 significant figures.
What is an uS gallon (gal)?
The US liquid gallon, exactly 231 cubic inches or 3.785411784 litres.
How can I estimate gallons to liters in my head?
Quick estimate: multiply by about 3.8 to get liters from gallons; this is within 0.4% of the exact factor.
What is 80 gal in liters?
80 gal = 302.8329 L (since 80 × 3.785412).
What is 500 gal in liters?
500 gal = 1,892.706 L (since 500 × 3.785412).
What is 15 gal in liters?
15 gal = 56.78118 L (since 15 × 3.785412).
How many decimals should I keep when converting gal to L?
Match the precision of your original measurement. For example, 37.85412 L rounds to 37.9 L at 3 significant figures; keep more digits only for engineering or scientific work.
More in Volume converters
- Imperial Gallons to Fluid Ounces Converter
- Gallons (US) to Cubic Meters Converter
- Imperial Gallons to Gallons (US) Converter
- Fluid Ounces to mL Converter
- Imperial Gallons to Liters Converter
- Fluid Ounces to Liters Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, NIST Handbook 44, Appendix C: units and systems of measurement