Liters to US gallons converter

Convert liters to US gallons (liters to gallons) with the exact factor, a conversion chart and worked steps.

Drafted with AI writing toolsUpdated Checked examples: 3

L
Try
US gallons
gal
US gallons: 2.64172052358 gal
Significant figures: 12; Nearest, ties away from zero
Conversion
10 L = 2.6417205236 gal
1 gal in liters
3.785411784L

10 L is about 2.6417205236 gal. In the other direction, 1 gal ≈ 3.78541178 L.

Liters to US gallons

0204050100150200Lgal10 → 2.6417
Liters to gallons chart Rows: 11
LitersUS gallons
0.250.066
0.50.1321
10.2642
1.50.3963
20.5283
51.3209
102.6417
205.2834
5013.2086
10026.4172
20052.8344
How it's calculated S
  1. Conversion factor

    1 L=0.264172052358 gal1\ \text{L} = 0.264172052358\ \text{gal}

    Rounded here for display; the calculation uses 50 significant digits.

  2. Multiply

    10×0.264172052358=2.64172052358 gal10 \times 0.264172052358 = 2.64172052358\ \text{gal}

About the liters to US gallons converter

To convert liters to US gallons, multiply by 0.2641720524; to convert back, multiply by 3.785411784. For example, 10 L is about 2.641721 gal. Displayed factors and results may be rounded.

Liter volumes commonly describe bottles, tanks and liquid purchases. A fractional liter can be useful when comparing container capacities or adapting a recipe. If the destination uses gallons or cups, check the regional definition before deciding how many containers to buy.

US gallon: 1 US gal = 231 in³ = 3.785411784 L. These values are exact.

Both units are defined exactly. Calculations use 50 significant digits and round only for display.

How to convert liters to gallons

Divide the liters by 3.785411784 to get US gallons, or multiply by 0.264172. So 10 L = 2.6417 US gal and a 50 L tank holds 13.21 US gal. For UK (imperial) gallons, divide by 4.54609 instead, which makes 10 L equal to 2.1997 imperial gallons.

Why the divisor is 3.785411784

A US liquid gallon is defined as 231 cubic inches, and the inch is exactly 25.4 mm, so one US gallon is exactly 3.785411784 L (NIST Handbook 44, Appendix C). Its reciprocal, 0.264172…, never ends, so gallon answers are usually rounded.

Metric containers in US gallons

  • 1.5 L bottle: 0.396 US gal
  • 2 L bottle: 0.528 US gal, so two of them hold a little more than a gallon
  • 19 L: 5.02 US gal, almost exactly 5 gallons
  • 20 L water jug or fuel can: 5.28 US gal
  • 50 L car fuel tank: 13.21 US gal
  • 200 L drum: 52.83 US gal

To express the leftover as quarts, multiply the decimal part by 4: 10 L is 2.6417 gal, or 2 gallons and 2.57 quarts.

Liters to gallons chart

LitersUS gallons, rounded
0.50.132086
10.264172
20.528344
51.320860
102.641721
10026.417205

To check an answer, multiply it back by 3.785411784: 2.6417 gal × 3.785411784 is 9.9999 L, so 10 L checks out.

US or imperial gallons

The imperial gallon is exactly 4.54609 L (official imperial tables), about 20% larger than the US gallon. The same liters therefore make fewer imperial gallons: 100 L is 26.42 US gal but 22.00 imperial gal.

US labels, receipts and specifications use the US gallon. British gallon figures, including UK miles-per-gallon ratings, use the imperial gallon. Convert those with the imperial gallon in the volume converter.

Mistakes to avoid

  • Dividing by 4. It gives 2.5 gal for 10 L instead of 2.64, about 5.4% short. Over a 200 L drum the shortcut loses 2.83 gallons.
  • Converting milliliters as liters. 750 mL is 0.75 L, or 0.198 US gal. Divide milliliters by 1,000 first, or use ml to liters.
  • Converting fuel economy with this factor. L/100 km and mpg run in opposite directions, so the conversion divides a constant by the value; use L/100 km to mpg.

For the reverse direction, use gallons to liters.

Worked examples

10 L to gal

Liters (L)
10 L
US gallons
2.6417205236 gal

Checked against: Exact-fraction computation from the legal unit definitions

1.5 L to gal

Liters (L)
1.5 L
US gallons
0.3962580785 gal

Checked against: Exact-fraction computation from the legal unit definitions

100 L to gal

Liters (L)
100 L
US gallons
26.4172052358 gal

Checked against: Exact-fraction computation from the legal unit definitions

Questions

How many US gallons fit in a 20 L container?

20 L is approximately 5.28344 US gal. Divide the liter capacity by 3.785411784. A container's usable fill level may be below its nominal volume, and imperial gallons require a different conversion.

How many US gallons are in one liter?

1 L is about 0.2641720524 gal. US gallon: 1 US gal = 231 in³ = 3.785411784 L. These values are exact.

How do I convert liters to US gallons?

Multiply by 0.2641720524: 10 L × 0.2641720524 ≈ 2.641721 gal. To convert back, divide by the same factor. The factor shown may be rounded.

How can I estimate liters in US gallons without a calculator?

Multiply by 0.26. This is 1.6% below the exact factor (about 0.2641720524), so 10 L comes out as 2.6 gal instead of 2.6417 gal.

About this calculator

gal=L×0.264172052358\text{gal} = \text{L} \times 0.264172052358

Sources

  1. NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B
  2. NIST Handbook 44, Appendix C: General tables of units of measurement
  3. BIPM, The International System of Units (SI Brochure), 9th edition

Checked against references

This calculator includes 3 worked examples with independently sourced answers. They run in the test suite, and you can run them here too.

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