Easily convert liquid volumes between US gallons and liters. This utility allows you to select your preferred number of decimal places for precise conversions.



247+ iOS apps curated and reviewed
If you already know Gallons and Liters, this is the deeper bench. 247+ gallons and liters apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | $0.99 | — | No | No | Aug 2026 | |
| 2 | $0.99 | 4.4★ (7) | No | No | Aug 2026 | |
| 3 | Free | — | Yes | No | May 2026 | |
| 4 | $1.99 | — | No | No | May 2026 | |
| 5 | $1.99 | — | Yes | No | Jun 2026 | |
| 6 | Free | — | No | No | May 2026 | |
| 7 | Free | 5.0★ (6) | No | No | Jul 2026 | |
| 8 | Free | — | Yes | No | May 2026 |





Easily convert liquid volumes between US gallons and liters. This utility allows you to select your preferred number of decimal places for precise conversions.












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.




This app provides fast and precise conversions for a wide range of liquid, dry, and cubic volume units. It supports metric, US customary, US dry, UK imperial, and various other measurement systems, including compound conversions. The interface is clean and intuitive, with features like favorites and light/dark modes.




Calculate fuel density at 15°C and determine tank volume using cm readings. Supports standard tank sizes and allows custom dimensions for precise dip calculations.


This utility app provides fuel haulers with quick access to tank charts and loading weights for diesel and gasoline. It allows users to reference stick readings for tank ullage at specific percentages and customize stick increments for precise measurements.


This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.


This app provides essential data and calculators for oil and gas well calculations. Access key dimensions, strengths, and specifications for tubulars to quickly determine volumes and capacities. Supports multiple unit systems for flexible calculations.


Easily calculate the volume of numerous 3D geometric shapes with this straightforward tool. View formulas, share results, and choose from multiple units and languages.


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.


Easily convert between various volume units including liters, milliliters, gallons, quarts, and fluid ounces. This tool is designed for quick and accurate conversions for everyday use.


Easily convert between numerous units and metrics with this intuitive application. It offers over 100 common conversion units across various categories, presented in a simple and elegant interface.


Easily calculate the volume and liquid levels for a wide variety of tank shapes. Supports multiple units and offers offline functionality for convenient use in industries or for personal projects.

