5 gal to L
- US gallons (gal)
- 5 gal
- Liters
- 18.92705892 L
Checked against: Exact-fraction computation from the legal unit definitions
US gallons to liters converter
Convert US gallons to liters (gallons to liters) with the exact factor, a conversion chart and worked steps.
By AdminDrafted with AI writing toolsUpdated Checked examples: 3
Liters
L
Liters: 18.92705892 L
- Conversion
- 5 gal = 18.92705892 L
- 1 L in US gallons
- 0.2641720524gal
5 gal is about 18.92705892 L. In the other direction, 1 L ≈ 0.26417205 gal.
US gallons to liters
Gallons to liters chart
| US gallons | Liters |
|---|---|
| 0.5 | 1.8927 |
| 1 | 3.7854 |
| 2 | 7.5708 |
| 3 | 11.3562 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 12 | 45.4249 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 25 | 94.6353 |
| 50 | 189.2706 |
How it's calculated S
Conversion factor
Exact by definition.
Multiply
About the US gallons to liters converter
To convert US gallons to liters, multiply by 3.785411784; to convert back, multiply by 0.2641720524. For example, 5 gal is about 18.927059 L. Displayed factors and results may be rounded.
A US gallon amount may describe fuel purchased, a tank or a bucket. Converting it to a metric volume helps compare capacities and receipts with a liter-based specification. Imperial gallons are larger, so confirm the receipt or product label says US before using this result.
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 gallons to liters
Multiply US gallons by 3.785411784, the exact number of liters in one US liquid gallon. So 5 US gal = 18.92705892 L and 10 gal = 37.85 L. Use it for fuel receipts, buckets, tanks and drums sold in gallons. A UK (imperial) gallon is larger: multiply it by 4.54609 instead.
Where 3.785411784 comes from
The US liquid gallon is defined as 231 cubic inches (NIST Handbook 44, Appendix C). An inch is exactly 2.54 cm, so 231 × 2.54³ = 3,785.411784 cm³, which is 3.785411784 L.
Because the factor is exact, whole gallons convert without rounding: 25 gal is exactly 94.6352946 L.
Quarts, pints and cups in a gallon
A US gallon splits into 4 quarts, 8 pints, 16 cups or 128 fluid ounces. In metric units:
- 1 quart = 0.946 L
- 1 pint = 0.473 L
- 1 cup = 236.6 mL
- 1 fluid ounce = 29.57 mL
For gallons plus quarts, turn the quarts into a fraction of a gallon first. A quart is a quarter gallon, so 2 gal 1 qt is 2.25 gal, or 8.517176514 L.
Common gallon sizes in liters
- 1 gal milk jug: 3.79 L
- 5 gal bucket: 18.93 L
- 50 gal water heater: 189.27 L
- 55 gal drum: 208.20 L
Gallons to liters chart
| US gallons | Liters |
|---|---|
| 0.5 | 1.892705892 |
| 1 | 3.785411784 |
| 3 | 11.356235352 |
| 5 | 18.92705892 |
| 10 | 37.85411784 |
| 25 | 94.6352946 |
Multiply by 1,000 for milliliters: one US gallon is 3,785.411784 mL.
Mistakes that skew the liters
- Multiplying by 4. Five gallons comes out as 20 L, which is 1.07294108 L too much, an overestimate of about 5.7%. Multiplying by 3.8 gives 19 L, only 0.4% high.
- Treating an imperial gallon as a US gallon. Five imperial gallons is 22.73045 L, 3.80339108 L more than five US gallons. Gallon figures from the UK are imperial (official imperial tables).
- Writing 2 gal 1 qt as 2.1 gal. The decimal means tenths of a gallon, so 2.1 gal is 7.95 L, while 2 gal 1 qt is 8.52 L.
For imperial gallons, quarts and pints, use the volume converter. The reverse direction is liters to gallons, and quarts to liters handles quart amounts directly.
Worked examples
3 gal to L
- US gallons (gal)
- 3 gal
- Liters
- 11.356235352 L
Checked against: Exact-fraction computation from the legal unit definitions
25 gal to L
- US gallons (gal)
- 25 gal
- Liters
- 94.6352946 L
Checked against: Exact-fraction computation from the legal unit definitions
Questions
How many liters is a 5 US gal bucket?
5 US gal is exactly 18.92705892 L. Multiply the gallon capacity by 3.785411784. This is about 18.93 L of nominal volume; check the marked fill line when measuring an actual quantity.
How many liters are in one US gallon?
1 gal is about 3.785411784 L. US gallon: 1 US gal = 231 in³ = 3.785411784 L. These values are exact.
How do I convert US gallons to liters?
Multiply by 3.785411784: 5 gal × 3.785411784 ≈ 18.927059 L. To convert back, divide by the same factor. The factor shown may be rounded.
How can I estimate US gallons in liters without a calculator?
Multiply by 3.8. This is 0.4% above the exact factor (about 3.785411784), so 5 gal comes out as 19 L instead of 18.9271 L.
About this calculator
Sources
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.