Gallons to Kiloliters
Convert gallons to kiloliters instantly — one gallon is 0.00378541 kiloliters.
| Gallons | Kiloliters |
|---|---|
| 1 gal | 0.003785 kL |
| 2 gal | 0.007571 kL |
| 3 gal | 0.011356 kL |
| 5 gal | 0.018927 kL |
| 10 gal | 0.037854 kL |
| 25 gal | 0.094635 kL |
| 50 gal | 0.189271 kL |
| 100 gal | 0.378541 kL |
How to use
- Enter a value in the Gallons field.
- The Kiloliters figure appears immediately — no button to press.
- Typing in the Kiloliters field converts back to Gallons the same way.
- Use the reference table for the values that come up most often.
Gallons to Kiloliters formula
Converting gallons to kiloliters is a single multiplication by 0.00378541178.
kL = gal × 0.00378541178
Why this factor: the gallon and the kiloliter are both defined against the liter, so dividing one definition by the other gives 0.00378541178 directly. Both definitions are set out in full below.
To go the other way, divide by 0.00378541178 — or use the Kiloliters to Gallons converter, which is the same calculation reversed.
Worked example
Start with 50 gal. Multiply by 0.00378541178 to get 0.189271 kL.
50 gal × 0.00378541178 = 0.189271 kL
The converter above does this for any value you type, in either direction.
What is a gallon?
A US liquid gallon is the standard large-volume unit in the United States.
Definition: Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.
Where it is used: Fuel sales, milk and beverage containers, and paint in the US.
Worth knowing: The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
What is a kiloliter?
A kiloliter is 1,000 liters — the same volume as one cubic meter.
Definition: Exactly 1,000 liters, which is exactly 1 m³.
Where it is used: Water utility billing, tank and reservoir capacity, and bulk liquid logistics.
Gallons vs Kiloliters
The gallon is a US customary unit while the kiloliter is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kiloliters are in a gallon?
One gallon equals 0.00378541178 kiloliters.
What is the formula to convert gallons to kiloliters?
Multiply the number of gallons by 0.00378541178. To reverse it, divide by 0.00378541178 instead.
How do I convert kiloliters back to gallons?
Divide by 0.00378541178, which is the same as multiplying by 264.172052.
How many kiloliters are in 10 gallons?
10 gal works out to 0.037854 kL.
Is there anything to watch out for with gallons?
The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
How is the gallon defined?
Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.