Gallons to Liters Converter

1 gal = 3.785412 L  ·  1 L = 0.264172 gal

Convert Gallons (US) to Liters Instantly

This free converter turns Gallons (US) (gal) into Liters (L) the moment you type. The relationship is fixed: 1 gal = 3.785412 L, so every value uses the same exact ratio. Enter a number above to see the result, read across the reference table for common values, or hit the swap button to convert L back to gal.

The gal to L Formula

Multiply the number of Gallons (US) by the conversion factor:

L = gal × 3.785412

To reverse the calculation, divide by the same factor (or multiply by its inverse):

gal = L × 0.264172

Worked Examples

Here are some common Gallons (US)-to-Liters conversions worked out using the formula above:

• 1 gal = 3.785412 L
• 2 gal = 7.570824 L
• 5 gal = 18.927059 L
• 10 gal = 37.854118 L
• 25 gal = 94.635295 L
• 100 gal = 378.541178 L

Understanding Gallons (US) and Liters

Gallons (US) (gal) and Liters (L) are units of volume or capacity. Liters and milliliters are metric and used almost everywhere, while US gallons, cups, and fluid ounces are customary units common in the United States. Note that US and imperial gallons differ — this converter uses the US definition.

Where This Conversion Is Used

• Cooking and baking — scaling recipes between metric and US measurements
• Automotive and fuel — comparing fuel volumes and engine capacities
• Beverages and bartending — measuring drinks and mixing ratios
• Gardening and chemicals — diluting solutions to the correct concentration
• Science labs — measuring reagents and liquid samples

Quick Conversion Tips

• For a fast estimate, round the factor to one or two decimals and adjust mentally.
• Keep the full factor (3.785412) for anything where precision matters, such as engineering or finance.
• Use the swap button above to convert in the opposite direction without re-typing.

Frequently Asked Questions

How many Liters are in 1 Gallons (US)?

One Gallons (US) (gal) equals exactly 3.785412 Liters (L). Multiply any value in gal by 3.785412 to convert it.

How do I convert Liters back to Gallons (US)?

Divide the value in L by 3.785412, or multiply it by 0.264172. For example, 10 L = 0.264172 × 10 = 2.641721 gal.

Is the gal to L conversion exact?

Yes. The factor 3.785412 is defined by international standards, so the converter is accurate to the limits of floating-point arithmetic. Results may be rounded for display, but the underlying calculation uses the full-precision value.

Can I use this converter on my phone?

Yes — the calculator works in any browser on desktop, tablet, and mobile, with no app or sign-up required.