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Best Measurement Conversion Apps

193+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated June 2026

Whether you're new to measurement conversion or looking for an upgrade, our curated collection of 193+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for Measurement Conversion

Unit Converter - Best Unit App#1

Unit Converter - Best Unit App by Alan Mrvica

Convert All Units and Currency
Editor's Choice
✈️ Travel
4.8😊(172K ratings)
FreeAdsIn-App Purchases
Unit Converter - Best Unit App screenshot 1
Unit Converter - Best Unit App screenshot 2
Unit Converter - Best Unit App screenshot 3
Unit Converter - Best Unit App screenshot 4
Unit Converter - Best Unit App screenshot 5
Unit Converter - Best Unit App screenshot 6

A free unit converter app optimized for iPhone and iPad, featuring 12 categories for converting various units including area, currency, data, length, and more. Includes daily currency updates for 155 world currencies and is designed for easy use. Download now for quick and accurate unit conversions.

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive conversions
  • 💡 Useful for travel and cooking
  • 🚀 Quick and efficient

Room to Improve

  • 🐛 Limited character input
  • 🐛 Difficulty with negative numbers
  • 💡 Lack of ability to quickly switch between conversions
Metric Conversion tool#2

Metric Conversion tool by Wight Hat

Unit and currency converter
Strong Contender
🔍 Reference
4.8😐(15K ratings)
Free
Metric Conversion tool screenshot 1
Metric Conversion tool screenshot 2
Metric Conversion tool screenshot 3
Metric Conversion tool screenshot 4
Metric Conversion tool screenshot 5

A must-have unit conversion app with over 30,000 conversions, 160 currencies, and detailed historical records. Easily convert weights, temperatures, lengths, areas, volumes, time, angles, and more. Access nine significant digits and fractional results.

What We Love

  • 💡 Useful conversion tool
  • 👍 Easy to use and navigate
  • 🚀 Quick and efficient
  • 👍 Comprehensive coverage of conversions

Room to Improve

  • 🔊 Intrusive and loud ads
  • 🔒 Questionable privacy practices
  • 🐛 Inaccurate conversions
Conversion Calculator !#3

Conversion Calculator ! by oWorld Software

Currency, Temperature, Length
Worth Considering
✈️ Travel
4.6😐(13K ratings)
FreeAdsIn-App Purchases
Conversion Calculator ! screenshot 1
Conversion Calculator ! screenshot 2
Conversion Calculator ! screenshot 3
Conversion Calculator ! screenshot 4
Conversion Calculator ! screenshot 5
Conversion Calculator ! screenshot 6

Easily convert units of measurement with this user-friendly app. Say goodbye to complex calculations and simplify your unit conversions today!

What We Love

  • 🚀 Easy to use
  • 🚀 Comprehensive unit conversions
  • 👍 Helpful app
  • 👍 Practical for engineering and mechanics

Room to Improve

  • 🔍 Too many ads
  • 🔍 Ads make the app unusable
  • 🔍 Ads are invasive and disrupt user experience

More Measurement Conversion apps to explore

4
Convert Any Unit Lite
Convert Any Unit Lite
Convert Any Unit Lite
Units & Currency Converter
Free

Convert Any Unit Lite is a versatile app that simplifies unit conversions for users, offering a wide range of conversion options. Easily switch between various units for length, weight, volume, and more with a user-friendly interface. Download now to streamline your conversion needs.

✈️ Travel
(47K)
5
Converter (unit conversions)
Converter (unit conversions)
Converter (unit conversions)
by Brent Royal-Gordon
Free

An essential unit conversion tool praised by Macworld Magazine, featuring 76 measurement units across various categories. Easily convert between units like length, weight, temperature, and more with a user-friendly interface and daily exchange rate subscription option for 161 currencies. Effortlessly manage your everyday unit conversions with this intuitive and practical application.

🔧 Utilities
(1.9K)
6
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

A versatile conversion calculator app that effortlessly converts various units like length, weight, volume, and more. Simplify your conversions with ease by downloading the app now!

🔍 Reference
(16K)
7
Conversion Calculator Units
Conversion Calculator Units
Conversion Calculator Units
Unit Conversion Calculator All
Free

This app is a handy conversion calculator with 12 categories for quickly converting units. Simplify your conversions with ease!

🔧 Utilities
(4.8K)
8
CONVERT UNITS
CONVERT UNITS
CONVERT UNITS
Simple unit conversion tool
Free

Convert Units is a comprehensive conversion tool that supports various unit types, including currency, with automatic currency updates and a vast selection of 160 currencies. It offers convenient features like multitasking on iPad, quick access links, and customizable display options for accuracy and rounding. The app provides a user-friendly interface with a dark design and the ability to disable sound and rotation.

📊 Productivity
(932)
9
Unit of measurement converter
Unit of measurement converter
Unit of measurement converter
Conversion units Calculator
Free

This unit conversion calculator simplifies comparing and converting different units across 15 categories and 95 measuring units. Say goodbye to unit conversion headaches and save time instantly by just inputting numbers and changing units. Try it now!

🔧 Utilities
(372)
10
Conversion Calculator Plus
Conversion Calculator Plus
Conversion Calculator Plus
Unit Converter
Free

"Explore the ultimate Unit Converter tool with Conversion Calculator Plus – your go-to Swiss army knife for effortless unit conversions. Simplify complex calculations and streamline your work effortlessly."

📊 Productivity
(15K)
11
Converter-Universal Conversion
Converter-Universal Conversion
Converter-Universal Conversion
by Trelleborg Sealing Solutions
Free

"An all-in-one conversion tool for engineers and scientists, featuring over 300 units across 32 categories, currency conversion, timezone conversion, and more. Switch between themes, create favorite lists, and enjoy a seamless user experience. Available in multiple languages – download now!"

🔧 Utilities
(897)
12
Units - Pro Unit Converter
Units - Pro Unit Converter
Units - Pro Unit Converter
by Homegrown Software Ltd
Free

This free app is a versatile unit converter with the ability to convert hundreds of units across various categories, including currency. Users can customize their conversion workflow by hiding unused units and reordering categories. The app is available on iPhones, iPod touches, and iPads.

🔧 Utilities
(150)
13
Unit Converter ++
Unit Converter ++
Unit Converter ++
by Nirav Patel
Free

This application is a versatile unit converter that allows users to easily convert between various units of measurement, including length, weight, temperature, and more. It's a useful tool for anyone who needs to perform conversions, whether for travel, work, or everyday tasks, and it works offline for convenience.

🔧 Utilities
(10)
14
Tape Measure & Ruler Арр
Tape Measure & Ruler Арр
Tape Measure & Ruler Арр
Multifunctional Ruler・Level
Free

Measure anything with a handy digital ruler and create sketches with text editing options using this smart electronic measuring tool app. Features include imperial and metric units, rangefinder, sketch mode, and sharing capabilities. Subscription unlocks additional features like the Area Tool, Undo, Flashlight, and Magnet.

🔧 Utilities
(4K)
15
Unit Converter
Unit Converter
Unit Converter
Conversion Calculator
Free

This conversion calculator app offers a wide range of unit conversions, from temperatures to lengths, with a user-friendly interface and personalizable themes. Download it now to streamline your tasks and enhance productivity with its smart features and extensive conversion options.

🔧 Utilities
(4)
16
Conversion Wizard
Conversion Wizard
Conversion Wizard
Measuring unit conversion
Free
📊 Productivity
(0)
17
iUnit Measurement Conversion
iUnit Measurement Conversion
iUnit Measurement Conversion
1650 units in 57 categories
$2.99

This powerful unit conversion app allows users to quickly and easily convert between 1650 different units in 57 categories, covering a wide range of physical quantities. Download the app to start converting units and make your calculations a breeze.

🔍 Reference
(6)
18
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Metric Conversion Calculator +
Free

Experience quick and easy unit conversions with a free, fast, and elegant calculator tool from Mila's Tools. Convert various units such as Area, Bits, Bytes, Length, Temperature, and more effortlessly. Try it out now for hassle-free conversions!

🔧 Utilities
(1.4K)
19
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Unit and Currency Converter
Free

Unit and Currency Converter: Access a comprehensive unit conversion tool featuring a wide range of currencies and units across various categories. Perform calculations with calculators for everyday needs, edit templates, and download user-contributed templates. Keep up-to-date with automatic currency exchange rate updates every 6 hours.

📊 Productivity
(2.3K)
20
Unit Plus Converter
Unit Plus Converter
Unit Plus Converter
Convert Any Unit or Metric
Free

"Effortlessly convert between various units with this beautifully designed app featuring over 100 common conversion units across multiple categories like area, length, temperature, and more. Help us improve by providing feedback and suggestions within the app or via email at gosalapps@gmail.com."

🔧 Utilities
(478)

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