Fuel Distance Calculator
Estimate how far you can travel from a given amount of fuel, or estimate how much fuel you need for a trip.
The calculator also shows an estimated trip cost when you enter a fuel price.
Result
--
Run the calculation to see the result.
| Metric | Value |
|---|---|
| Fuel economy in mpg | -- |
| Fuel economy in km/L | -- |
| Fuel economy in L/100km | -- |
| Trip cost | -- |
Quick Answer
Multiply fuel used by fuel economy to get distance, or divide distance by fuel economy to get fuel used. If you enter fuel price, the calculator estimates trip cost too.
How to Calculate
- Choose whether you want distance or fuel needed.
- Enter the fuel amount or trip distance.
- Enter fuel economy and fuel price.
- Click Calculate.
Formula
Distance = fuel amount x fuel economy
Fuel used = distance / fuel economy
Trip cost = fuel used x fuel price
Worked Examples
Example 1: 10 gallons at 30 mpg gives 300 miles.
Example 2: 300 miles at 30 mpg needs 10 gallons.
Example 3: At $3.50 per gallon, 10 gallons costs $35.00.
How to Interpret Your Results
| Output | Meaning | Action |
|---|---|---|
| Distance | How far the fuel should take you. | Useful for trip planning. |
| Fuel used | How much fuel the trip requires. | Useful for refueling estimates. |
| Trip cost | The estimated spending on fuel. | Use it to budget travel. |
Frequently Asked Questions
You can still use the calculator if you also enter either distance or fuel amount, depending on the mode you choose.
Yes. If you switch to km/L, the result will be shown in kilometers.
Yes, the calculator converts between liters and gallons before calculating the answer.
Related Calculators
References
- OmniCalculator reference page
- Trip distance is based on fuel amount and fuel economy.
- Last reviewed: March 2026.