Gas Mileage & Fuel Economy Calculator
Calculate vehicle fuel efficiency in MPG (US/UK) and Liters per 100 km plus cost per mile.
- 100% free
- Private in browser
- No signup
- No watermarks
Miles Per Gallon (US MPG)
27.83
Liters Per 100km
8.45
Fuel Cost Per Mile ($)
0.131
Total Trip Fuel Cost ($)
41.98
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About Gas Mileage & Fuel Economy Calculator
Calculate vehicle fuel efficiency in MPG (US/UK) and Liters per 100 km plus cost per mile. Enter Distance Driven, Gallons of Fuel Consumed and Gas Price Per Gallon and the tool works out Miles Per Gallon, Liters Per 100km and Fuel Cost Per Mile straight away. Everything runs in your browser, so your data never leaves your device.
How to use Gas Mileage & Fuel Economy Calculator
- Enter the required input values.
- View the instantly calculated results in real time.
Key features
- Fast client-side calculation
- Real-time updates
- Privacy-first design (no data leaves browser)
Frequently asked questions
- Is this calculation private?
- Yes, 100% of calculations run locally in your web browser. No information is stored or transmitted.
- What does the Gas Mileage & Fuel Economy Calculator give me?
- It works out Miles Per Gallon, Liters Per 100km, Fuel Cost Per Mile and Total Trip Fuel Cost, updating live as you change the inputs.
- What do I need to enter?
- Just Distance Driven, Gallons of Fuel Consumed and Gas Price Per Gallon. Every field has a sensible default you can start from.
- Is my data uploaded anywhere?
- No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
- Does it work on a phone?
- Yes. The layout adapts to small screens and needs no app or signup.
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