Fuel Cost Calculator

Fuel Cost Calculator shows you, in seconds, roughly how much fuel a trip will use and what it will cost. Enter the distance, your vehicle's fuel efficiency and the price at the pump, and read the total straight away. It works completely offline and nothing you enter ever leaves your phone.

HOW IT WORKS
The math is simple and transparent:

US units
1. Fuel used (gallons) = distance in miles ÷ miles per gallon (mpg)
2. Cost = gallons × price per gallon
For example, 300 miles at 30 mpg uses 10 gallons; at $3.50 a gallon that is $35.00, or about 12 cents per mile.

Metric units
1. Fuel used (litres) = distance in km × (litres per 100 km) ÷ 100
2. Cost = litres × price per litre
For example, 500 km at 8 L/100km uses 40 litres; at $1.80 a litre that is $72.00.

WHAT YOU CAN DO
• Switch freely between US (miles, mpg, gallons) and metric (km, L/100km, litres)
• Get the total fuel cost, the fuel used, the cost per mile or km, and the distance driven
• Turn on round trip to double the distance for the return leg automatically
• Split the cost between travellers to see the cost per person for a carpool or road trip
• Compare the total cost across a range of pump prices so you can see how sensitive a long drive is to fuel prices
• Learn the formulas, the difference between mpg and L/100km, and simple ways to spend less on fuel

BUILT FOR CLARITY
A clean, modern design puts the big cost figure first, with the supporting numbers right beside it. Light and dark themes, a tiny download, no clutter and no account required.

A PLANNING ESTIMATE, NOT A GUARANTEE
This is a simplified educational tool. Real-world fuel consumption depends on your specific vehicle, driving style, traffic, terrain, load, air conditioning and weather, so your actual cost may be higher or lower. Always budget a little extra. This app is for general information and education only and is not financial advice.

PRIVACY
The app collects no personal data and works fully offline. Ads are served by Google AdMob, which may use an advertising identifier as described in Google's policies.

Download Fuel Cost Calculator and know what your next drive will cost before you turn the key.