Easily convert between MPG and L/100 KM with this simple fuel calculator. Track your fuel efficiency and journey costs by entering fuel amounts, distance driven, and price per unit. Save your calculations for future reference.



194+ iOS apps curated and reviewed
The best mpg fuel converter apps on iPhone average 4.7★ across 194+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | |
| 2 | $0.99 | 5.0★ (7) | No | No | Jul 2026 | |
| 3 | Free | 4.7★ (28K) | No | Yes | Jul 2026 | |
| 4 | Free | 4.7★ (15K) | Yes | Yes | Jul 2026 | |
| 5 | Free | 4.4★ (44) | No | No | Jun 2026 | |
| 6 | Free | 4.7★ (2.3K) | No | No | Jul 2026 | |
| 7 | Free | 4.7★ (6.4K) | No | No | Jul 2026 | |
| 8 | Free | 5.0★ (6) | No | No | Jul 2026 |









Easily convert between MPG and L/100 KM with this simple fuel calculator. Track your fuel efficiency and journey costs by entering fuel amounts, distance driven, and price per unit. Save your calculations for future reference.





Track your vehicle's fuel economy and maintenance history. Set reminders for essential services like oil changes and tire rotations to help you save money. Seamlessly sync your data with the web platform for comprehensive vehicle management.


This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.


Easily track your car's mileage, fuel economy, and maintenance expenses. This app offers fast data entry, comprehensive statistics, and international support for various units. It allows unlimited data saving and seamless upgrades to a full version.


This app helps users find significant discounts on diesel and unleaded fuel at various stations. It offers route planning with discount optimization and seamless navigation integration. Additionally, it provides robust fleet management tools for controlling spending and managing finances.


Discover nearby fueling stations for alternative energy sources like electricity, natural gas, and biofuels. View station details, including payment options, access, and specific fuel types, all sourced from a comprehensive U.S. Department of Energy database.


This application helps users calculate their fuel consumption and associated costs. It utilizes standard units commonly used in the USA, such as miles, dollars, and U.S. gallons.


Easily compare fuel economy across different global standards for both combustion and electric vehicles. This tool converts between 13 units, allowing you to understand MPG, km/L, L/100km, mi/kWh, and more.


Effortlessly convert between hundreds of units across 26 essential categories with this precision calculator. Designed for speed and simplicity, it offers accurate results in seconds for students, professionals, and travelers alike. Enjoy offline functionality and a customizable experience.




Track your vehicle's fuel consumption, mileage, and expenses. Monitor fill-ups, gas prices, and maintenance costs with detailed statistics and charts. Supports multiple vehicles and fuel types.


Easily convert over 160 currencies and 350 physical units with real-time updates and offline capabilities. Create a favorites list for quick access to frequently used conversions and enjoy geo-based currency options. An ad-free version is available for purchase.


This app connects to your car's OBD2 port via a compatible adapter to read vehicle data. Monitor fuel economy, clear check engine lights, and create custom dashboards for real-time diagnostics and performance tracking.


Easily convert between various units and currencies with a simple, intuitive interface. Features live currency updates for 155 world currencies, refreshed every 15 minutes. Optimized for a wide range of Apple devices, including iPads with Split View support.


This app offers a comprehensive unit and currency converter with a vast array of categories and calculators for everyday needs. It allows users to customize templates, download shared ones, and provides automatic exchange rate updates for 167 world currencies.


This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.


This app offers a fast and user-friendly way to convert units and currencies. Customize your conversion lists and get instant results as you type, with support for over 350 units and 160 currencies. It also includes a built-in calculator and offline currency data.


This app offers a comprehensive unit and currency conversion tool with a visually appealing interface and extensive unit options. It supports standard and non-standard units, compound conversions, and fraction input, making it versatile for various needs.


Easily track your vehicle's fuel consumption and mileage. Log gas purchases, calculate fuel economy, and view detailed statistics and plots of your driving data. Supports multiple units and data synchronization.