Fuel Price Converter
Turn a fuel price per litre or per gallon into every other unit, and into your own currency at the rate you choose.
We don’t fetch live rates. The starting rate is a round example, not today’s rate: type the rate from your bank, card or a reliable source.
Example figures only, not real prices. For each place type the price, what it is per, its currency and the rate to your currency (1 of that currency = ? of yours). Leave a price empty to skip a row.
In the fuel price’s currency.
About 85–95% is usual.
How your fuel price is converted
Price per gallon = price per litre × litres in a gallon. Then × the exchange rate.
- 1
Price per litre
1.500 EUR per L(already per litre)= 1.500 EUR /L
- 2
Per US gallon
1.500 EUR × 3.785(3.785 L = 1 US gal)= 5.678 EUR
- 3
Per UK gallon
1.500 EUR × 4.546(4.546 L = 1 UK gal)= 6.819 EUR
- 4
In USD
1.500 EUR × 1.16(1 EUR = 1.16 USD)= 1.740 USD /L
Read more: the formula, a worked example, gallon sizes, comparing places and electric cars
Fuel is sold per litre in most of the world, per US gallon in the United States and a few other places, and you still see UK (imperial) gallons in older figures and car manuals. A price only means something with its unit and its currency. To compare two prices, put them both in the same unit and the same currency.
The formula
price per litre = price per US gallon ÷ 3.785411784
price per litre = price per UK gallon ÷ 4.54609
price per US gallon = price per litre × 3.785411784
price per UK gallon = price per litre × 4.54609
price in your currency = price × exchange rate (1 pump currency = x yours)
tank cost = tank size in litres × price per litre
trip fuel = distance in km × L/100 km ÷ 100
electric per 100 km = kWh per 100 km ÷ charging efficiency × price per kWh
matching fuel price = electric per 100 km ÷ L/100 km
Worked example
With the starting inputs, fuel costs 1.50 EUR a litre and the rate is 1 EUR = 1.16 USD (an example rate, not today’s).
- Per US gallon: 1.50 × 3.785411784 = 5.678 EUR.
- Per UK gallon: 1.50 × 4.54609 = 6.819 EUR.
- In US dollars: 1.50 × 1.16 = 1.740 USD a litre, which is 1.74 × 3.785411784 = 6.587 USD a US gallon and 1.74 × 4.54609 = 7.910 USD a UK gallon.
- Turned round, 1 USD = 1 ÷ 1.16 = 0.8621 EUR.
(If your device is set to another currency, the starting “Show it in” currency and its example rate follow it. The sums work the same way.)
Gallons and litres
| Per litre | Per US gallon | Per UK gallon |
|---|---|---|
| 0.50 | 1.893 | 2.273 |
| 1.00 | 3.785 | 4.546 |
| 1.50 | 5.678 | 6.819 |
| 2.00 | 7.571 | 9.092 |
| 100 | 378.5 | 454.6 |
A US gallon is exactly 3.785411784 litres (231 cubic inches). A UK gallon is exactly 4.54609 litres. One UK gallon is 1.201 US gallons.
Comparing places
The example places in Advanced, in US dollars, with a 50 litre tank and a 500 km trip at 7 L/100 km (35 litres):
| Place | Price | USD per litre | 50 L tank | Trip |
|---|---|---|---|---|
| Home town | 3.50 USD / US gal | 3.50 ÷ 3.785 = 0.925 | 46.23 | 32.36 |
| Trip abroad | 1.50 EUR / L × 1.16 | 1.740 | 87.00 | 60.90 |
| Over the border | 1.40 GBP / L × 1.349 | 1.889 | 94.43 | 66.10 |
“Trip abroad” is 1.74 ÷ 0.9246 − 1 = 88.2% dearer per litre than “Home town”, and filling the tank there costs 87.00 − 46.23 = 40.77 USD more. These are made-up figures to show the sums, not real prices, and the rates (1 EUR = 1.16 USD, 1 GBP = 1.349 USD) are round examples.
A trip and a tank
At 1.50 EUR a litre, a 50 litre tank costs 50 × 1.50 = 75.00 EUR (87.00 USD). A 500 km trip at 7 L/100 km uses 500 × 7 ÷ 100 = 35 litres and costs 35 × 1.50 = 52.50 EUR (60.90 USD), which is 10.50 EUR per 100 km.
Electric car equivalent
An electric car using 17 kWh/100 km, charging at 90% efficiency, pays for 17 ÷ 0.90 = 18.89 kWh per 100 km. At 0.30 EUR a kWh that is 18.89 × 0.30 = 5.67 EUR per 100 km, against 10.50 EUR for the fuel car: 4.83 EUR less. It is like paying 5.67 ÷ 7 = 0.81 EUR a litre for fuel. The two cost the same when electricity costs 10.50 ÷ 18.89 = 0.556 EUR a kWh.
Tips
- US prices often end in 9/10 of a cent (3.499). Type all the decimals for an exact answer.
- Use the same exchange rate you will actually pay: your card’s rate is often a little worse than the mid-market rate.
- MPG figures in the UK use UK gallons; in the US, US gallons. The fuel economy chips keep them apart.
- Diesel and petrol have different prices, so compare like with like.
This converter has no built-in fuel prices or live exchange rates: every price and rate is what you enter, and the starting figures are examples. Gallon sizes are exact by definition. Checked 15 October 2026.
Common questions
How do I convert a price per litre to a price per gallon?
Multiply by the litres in the gallon you want: 3.785411784 for a US gallon or 4.54609 for a UK (imperial) gallon. So 1.50 a litre is 1.50 × 3.785 = 5.678 a US gallon, or 1.50 × 4.546 = 6.819 a UK gallon. To go back, divide by the same number.
Why is a UK gallon different from a US gallon?
They are two old measures. The UK (imperial) gallon is 4.54609 litres and the US gallon is 3.785411784 litres, so a UK gallon is about 20% bigger. A price per UK gallon is always about 1.2 times the price per US gallon for the same fuel.
How do I compare fuel prices between two countries?
Turn both prices into the same unit and the same currency. Say one place charges 1.50 EUR a litre and another 3.50 USD a US gallon. At 1 EUR = 1.16 USD, the first is 1.50 × 1.16 = 1.74 USD a litre; the second is 3.50 ÷ 3.785 = 0.925 USD a litre. Advanced mode compares up to 4 places at once.
Does this use live exchange rates or real fuel prices?
No. You type the price you see and the exchange rate you want to use, such as the rate from your bank or card. The starting rate is a round example, not today’s rate, and there are no built-in fuel prices.
Is an electric car cheaper than fuel at these prices?
Compare the cost per 100 km. A car using 7 L/100 km at 1.50 a litre costs 10.50 per 100 km. An electric car using 17 kWh/100 km, with 10% lost while charging, needs 18.89 kWh; at 0.30 a kWh that is 5.67, which is like paying 0.81 a litre for fuel. Advanced mode works it out for your prices.
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