# Liters to US gallons converter

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

Interactive version: https://www.calcopenly.com/conversion/liters-to-gallons
Subject: Unit converters

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.

One litre is about 0.2641720524 US gallons, so 10 L is 2.641721 gal. To convert liters to gallons, multiply by 0.2641720524; to convert back, multiply by 3.785411784.

The US gallon is defined as exactly 231 cubic inches, which is 3.785411784 L. The factor has no exact decimal form, so results are computed with 50 significant digits and rounded only for display.

## Inputs

- **Liters (L)**

## Results

- US gallons (gal) — main result
- Conversion
- 1 gal in liters (L)

## Formula

$$
\text{US gallons} = \text{liters} \times 0.264172052358
$$

## 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 (scripts/gen-pairs.py, Python fractions)

### 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 (scripts/gen-pairs.py, Python fractions)

### 100 L to gal

- Liters (L): 100 L
- **US gallons: 26.4172052358 gal**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### How many US gallons fit in a 20-liter 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 a litre?

One litre is about 0.2641720524 US gallons. The US gallon is defined as exactly 231 cubic inches, which is 3.785411784 L.

### How do you convert liters to gallons?

Multiply the number of liters by 0.2641720524. For example, 10 L × 0.2641720524 = 2.641721 gal. To go the other way, divide by 0.2641720524.

### How can I estimate liters to gallons without a calculator?

Multiply by 0.26. That is 1.6% low of the exact factor 0.2641720524, so 10 L comes out as 2.6 gal instead of 2.6417.

### How accurate is the liters to US gallons converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “10 L to gal” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

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

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)