# Fuel cost calculator for Mac, Windows and Linux

Written on 25 October 2026 by Ratio.

Distance, consumption and price in one line: “450 km at 6.5 l/100km at 7.2 eur/l”. Each “at” applies to the result so far.

## Trip cost

| 450 km at 6.5 l/100km | 29.25 L |
| --- | --- |
| 450 km at 6.5 l/100km at 7.2 eur/l | €210.60 |
| prev / 3 | €70.20 |

Split it between the passengers with “/ 3”, or by name with the [bill splitting calculator](https://useratio.app/bill-splitting-calculator).

## Consumption

| 6.5 l/100km in mpg | 36.19 mpg |
| --- | --- |
| 30 mpg in l/100km | 7.84 L/100km |
| 20 km/l in l/100km | 5 L/100km |
| 300 mi in km | 482.8 km |

`mpg` is miles per US gallon; `mpguk` is per imperial gallon.

[Try Ratio free for 7 days](https://useratio.app/download) · $14.99 once, updates included

## Questions

**How do I convert l/100km to mpg?** Type “6.5 l/100km in mpg”. Ratio knows the two run in opposite directions, so it divides rather than multiplies.

**Can it convert currency too?** Yes: “450 km at 6.5 l/100km at 1.8 usd/l in eur” uses today's rate.

**What about time zones on the way?** “10:00 London + 11 h in Tokyo” gives the arrival time, and “jet lag London to Tokyo” the difference and roughly how long to adjust.

Source: https://useratio.app/fuel-cost-calculator