Direct answer
Converting liters of water into US gallons
Multiply the water volume in liters by 0.2641720524. For example, 100 liters of water occupies approximately 26.4172 US gallons.
The formula converts volume rather than weight. It works for water tanks, household containers, rainwater storage, emergency supplies, irrigation, camping equipment, and water-use records.
The result does not change because the liquid is water. The same liter-to-US-gallon volume factor applies to other liquids, although their weights may differ.
Enter any whole or decimal water volume in liters.
Water-volume calculation
Water liters-to-US-gallons formula
Multiply the complete liter volume by the standard conversion factor.
One US liquid gallon equals exactly 3.785411784 liters.
For 250 liters:
Two hundred fifty liters equals approximately 66.043 US gallons.
Manual method
How to convert a water volume step by step
Use 75 liters as an example.
- 01
Record the water volume in liters
Begin with 75 liters and keep any decimal places.
- 02
Multiply by 0.2641720524
Calculate 75 × 0.2641720524.
- 03
Read the US-gallon result
The result is approximately 19.81290393 US gallons.
- 04
Round for the intended use
To two decimal places, 75 liters equals approximately 19.81 US gallons.
Storage reference
Water liters-to-US-gallons chart
| Liters of water | US gallons | Rounded value |
|---|---|---|
| 1 L | 0.264172 US gal | 0.26 gal |
| 5 L | 1.320860 US gal | 1.32 gal |
| 10 L | 2.641721 US gal | 2.64 gal |
| 20 L | 5.283441 US gal | 5.28 gal |
| 25 L | 6.604301 US gal | 6.60 gal |
| 50 L | 13.208603 US gal | 13.21 gal |
| 75 L | 19.812904 US gal | 19.81 gal |
| 100 L | 26.417205 US gal | 26.42 gal |
| 200 L | 52.834410 US gal | 52.83 gal |
| 250 L | 66.043013 US gal | 66.04 gal |
| 500 L | 132.086026 US gal | 132.09 gal |
| 750 L | 198.129039 US gal | 198.13 gal |
| 1,000 L | 264.172052 US gal | 264.17 gal |
| 2,000 L | 528.344105 US gal | 528.34 gal |
| 5,000 L | 1,320.860262 US gal | 1,320.86 gal |
Worked water conversions
Water-volume conversion examples
Convert 20 liters of water
Twenty liters equals approximately 5.28344 US gallons.
Convert 200 liters of water
Two hundred liters equals approximately 52.8344 US gallons.
Convert 1,000 liters of water
One thousand liters equals approximately 264.172 US gallons.
Tanks and containers
Using the conversion for water storage
Storage tanks and containers may be labeled in liters while pumps, treatment systems, or household planning documents use US gallons.
Small storage tank
Medium storage tank
Large household tank
A tank's nominal capacity may be higher than its normal usable volume because of overflow outlets, air space, fittings, tank shape, sediment, or operating limits.
Planning and monitoring
Converting daily water use
Water-use records may report liters per day while another system uses gallons per day. Convert the daily volume with the same factor.
| Liters per day | US gallons per day |
|---|---|
| 10 L/day | 2.64172 US gal/day |
| 25 L/day | 6.60430 US gal/day |
| 50 L/day | 13.20860 US gal/day |
| 100 L/day | 26.41721 US gal/day |
| 200 L/day | 52.83441 US gal/day |
| 500 L/day | 132.08603 US gal/day |
Consumption varies by activity, household size, equipment, climate, and local circumstances. The table converts volume only.
Volume and mass
Does one liter of water weigh one kilogram?
One liter of water is often approximated as one kilogram for everyday purposes, but the precise mass varies with temperature, pressure, purity, and measurement conditions.
Liters and US gallons measure volume. Kilograms and pounds measure mass or weight-related quantities. A liters-to-gallons conversion does not calculate how heavy a filled tank or container will be.
Large water volumes can be very heavy. Use suitable engineering, manufacturer, building, transport, and safety guidance when placing or moving tanks.
Nominal versus practical volume
Why a container may hold less than its stated capacity
- Containers may require expansion or air space.
- Overflow outlets can limit the maximum water level.
- Internal fittings and pumps occupy volume.
- Rounded walls or tapered shapes can affect capacity.
- Sediment or debris may reduce usable space.
- Manufacturers may state nominal rather than working capacity.
Unit distinction
Water volume in US and imperial gallons
This guide converts to US liquid gallons. Imperial gallons are larger and use a different conversion factor.
Used in this guide
Larger gallon unit
About 21.997 imperial gal
Accuracy check
Common water-volume conversion mistakes
Confusing volume with weight
Gallons and liters describe capacity, not the load a container places on a structure or vehicle.
Using imperial gallons
Confirm that the required result is in US liquid gallons.
Treating nominal capacity as usable capacity
Operating limits, fittings, and air space can reduce the amount of water stored.
Rounding the original liters
Keep the complete source measurement and round only the final gallon result.
Continue reading
Related liters-to-US-gallons guides
Questions and answers
Frequently asked questions
How many US gallons is 100 liters of water?
One hundred liters equals approximately 26.4172 US gallons.
How many US gallons is 1,000 liters of water?
One thousand liters equals approximately 264.172 US gallons.
Does the conversion change for water?
No. The liters-to-US-gallons volume factor is the same for water and other liquids.
Do liters and gallons tell me how heavy the water is?
No. Liters and gallons measure volume rather than mass or structural load.
Convert a volume
Use the Liters to US Gallons Converter
Enter any positive whole or decimal liter measurement to calculate US liquid gallons instantly.
Open Liters to US Gallons ConverterLast updated: July 27, 2026