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Best Metric Conversion Tool Apps

184+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated July 2026

If you already know Metric Conversion tool, this is the deeper bench. 184+ metric conversion tool apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Metric Conversion Tool Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Metric Conversion toolMetric Conversion toolFree4.8★ (15K)NoNoAug 2026
2Unit Converter - Best Unit AppUnit Converter - Best Unit AppFree4.8★ (191K)YesYesAug 2026
3Convert Any Unit LiteConvert Any Unit LiteFree4.7★ (48K)YesNoAug 2026
4CONVERT UNITSCONVERT UNITSFree4.7★ (1.3K)YesNoAug 2026
5Converter (unit conversions)Converter (unit conversions)Free4.7★ (1.9K)NoYesAug 2026
6Unit Converter - Convert allUnit Converter - Convert allFree4.6★ (13K)YesYesAug 2026
7Unit Converter - Pro Units AppUnit Converter - Pro Units AppFree4.6★ (16K)NoYesAug 2026
8Converter+ (Units, Currencies)Converter+ (Units, Currencies)Free4.7★ (2.3K)NoYesAug 2026

Top Picks for Metric Conversion Tool

Metric Conversion tool#1

Metric Conversion tool by Wight Hat

Unit and currency converter
Editor's Choice
🔍 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

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise 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
Unit Converter - Best Unit App#2

Unit Converter - Best Unit App by Alan Mrvica

Convert All Units and Currency
Strong Contender
✈️ Travel
4.8😊(191K ratings)
FreeAdsIn-App Purchases
#60in Travel
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

Easily convert between a wide range of units across 20 categories, including length, weight, temperature, and more. Features live currency updates for 155 world currencies, refreshed daily. Designed for simplicity and visual appeal.

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
Convert Any Unit Lite#3

Convert Any Unit Lite by Cider Software LLC

Units & Currency Converter
Worth Considering
✈️ Travel
4.7😊(48K ratings)
FreeAds
Convert Any Unit Lite screenshot 1
Convert Any Unit Lite screenshot 2
Convert Any Unit Lite screenshot 3
Convert Any Unit Lite screenshot 4
Convert Any Unit Lite screenshot 5

Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.

What We Love

  • 👍 Easy to use
  • 🚀 Comprehensive unit conversions
  • 💡 Allows custom unit creation
  • 🔧 Useful for cooking, travel, and work

Room to Improve

  • 🔍 Too many unit options can be overwhelming
  • 🔍 Ads can be intrusive and disrupt usage
  • 🐛 Occasional bugs and freezing issues

More Metric Conversion Tool apps to explore

4
CONVERT UNITS
CONVERT UNITS
CONVERT UNITS
Simple unit conversion tool
Free

Easily convert between various units of measurement including length, weight, temperature, and currency. Features automatic currency updates, a vast selection of currencies, and customizable display options for accuracy and rounding. Optimized for multitasking on iPad and offers a beautiful dark design.

Converts length, weight, speed, area, time, pressure, volume, power, fuel, temperature, data, and currencyAutomatic currency updates160 currencies available
📊 Productivity
(1.3K)
ad-supported
5
Converter (unit conversions)
Converter (unit conversions)
Converter (unit conversions)
by Brent Royal-Gordon
Free

Easily convert between 76 measurement units across eight common types, including length, weight, temperature, and volume. Features a built-in calculator and optional currency conversion with daily exchange rate updates.

76 measurement units8 common unit typesBuilt-in four-function calculator
🔧 Utilities
(1.9K)
free with in-app purchases
6
Unit Converter - Convert all
Unit Converter - Convert all
Unit Converter - Convert all
Measurements & Calculations
Free

Easily convert between various units of measurement, including currencies, temperature, length, and weight. This intuitive tool provides real-time currency exchange rates and a comprehensive list of conversions for everyday use.

Real-time currency conversionsExtensive unit categories (weight, temp, length, volume, etc.)Simple and intuitive interface
✈️ Travel
(13K)
free with in-app purchases
7
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

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.

16 conversion categoriesCustom unit listsLive currency exchange rates
🔍 Reference
(16K)
free with in-app purchases
8
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Unit and Currency Converter
Free

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.

Extensive unit and currency conversionMultiple calculators (mortgage, loan, tip)Customizable and downloadable templates
📊 Productivity
(2.3K)
free with in-app purchases
9
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Conversion Calculator PLUS
Free

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

27 conversion categories300+ unitsCompound unit support
🔧 Utilities
(1.4K)
free with in-app purchases
10
Conversion Calculator Units
Conversion Calculator Units
Conversion Calculator Units
Unit Conversion Calculator All
Free

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

Converts over 140 unitsSupports 12 conversion categoriesCustomizable themes
🔧 Utilities
(4.8K)
free with in-app purchases
11
Converter-Universal Conversion
Converter-Universal Conversion
Converter-Universal Conversion
by Trelleborg Sealing Solutions
Free

This app offers a comprehensive unit and hardness conversion tool with an easy-to-use interface. It includes currency conversion with updated exchange rates, over 300 engineering and scientific units, and a specialized hardness converter. Additional features like timezone conversion, pace calculation, and a standard calculator enhance its utility.

Currency converter with live exchange ratesOver 300 engineering and scientific unitsSpecialized hardness converter
🔧 Utilities
(897)
free
12
inch mm converter
inch mm converter
inch mm converter
Easy inch mm converter
Free

Easily convert measurements between inches and millimeters. This straightforward tool simplifies length conversions for everyday use.

Inch to millimeter conversionMillimeter to inch conversionEasy to use interface
🔧 Utilities
(104)
ad-supported
13
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Simple With Metric & Imperial
Free

Easily convert between metric and imperial units for a wide range of measurements including area, speed, temperature, and weight. Supports scientific prefixes and offers a history of your conversions. No internet connection required.

Metric to Imperial unit conversionImperial to Metric unit conversionArea, speed, temperature, volume, weight conversions
🔧 Utilities
(916)
free with in-app purchases
14
Unit Plus Converter
Unit Plus Converter
Unit Plus Converter
Convert Any Unit or Metric
Free

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.

Over 100 conversion unitsMultiple categoriesArea conversion
🔧 Utilities
(478)
free
15
Metric Unit Converter
Metric Unit Converter
Metric Unit Converter
by A1Brains Infotech
Free

This application provides a comprehensive tool for converting a wide range of metric units across various categories. It's designed for everyday use, financial transactions, and professional applications in fields like real estate and engineering.

Extensive unit conversion categoriesReal-time currency conversionUseful for daily life and professional use
🔧 Utilities
(3)
free
16
Measure Master Pro Calculator
Measure Master Pro Calculator
Measure Master Pro Calculator
Design + Building Math Calc
Free

This app provides comprehensive U.S. and metric unit conversions and advanced calculations for design and building projects. It offers solutions for geometry, weight, and dimensional analysis, with a user-friendly interface and built-in help.

Multi-dimensional unit conversion (U.S. & metric)Advanced weight calculationsGeometry solutions (circle area, circumference)
🔧 Utilities
(4.2K)
free with in-app purchases
17
Unit Ease - Metric vs Imperial
Unit Ease - Metric vs Imperial
Unit Ease - Metric vs Imperial
Accurate unit conversion.
Free

This app offers accurate unit conversions for a wide range of categories including weight, length, temperature, and volume. It also provides specialized size charts for clothing and rings, along with everyday and scientific conversion tools. Users can customize display formats and enjoy a visually appealing interface.

Seamless unit conversionDedicated size chartsEveryday life conversions
🔧 Utilities
(72)
free with in-app purchases
18
Mila's Unit Converter PRO
Mila's Unit Converter PRO
Mila's Unit Converter PRO
Ultimate conversion calculator
$9.99
$29.99 | 67% OFF

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.

Hundreds of units across 26 categoriesMetric, imperial, and specialized unitsSmart conversions for temperature, fuel, and more
🔧 Utilities
(994)
paid
19
Unit Converters - All Units
Unit Converters - All Units
Unit Converters - All Units
Unit Conversion Made Easy
Free
🔧 Utilities
(0)
20
inch cm converter
inch cm converter
inch cm converter
Easy inch cm converter
Free

Easily convert measurements between inches and centimeters with this straightforward utility. It offers a simple interface for quick and accurate conversions.

Inch to cm conversionCentimeter to inch conversionEasy to use interface
🔧 Utilities
(23)
ad-supported

FAQ about Metric Conversion Tool

What are the best metric conversion tool apps for iPhone?
Metric Conversion tool tops our metric conversion tool apps ranking as of July 2026, with a 4.8-star average from 15K App Store ratings, and it's free to download.
Yes — 19 of the top metric conversion tool apps we rank are free to download, including Metric Conversion tool and Unit Converter - Best Unit App.
Metric Conversion tool has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 184+ metric conversion tool apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The app is a comprehensive unit and currency converter. It allows users to convert between a vast number of units, including weight, temperature, length, area, volume, speed, time, angle, pressure, and currency. It aims to provide accurate conversion results with a user-friendly interface.
Key features include an easy-to-use interface, offline functionality, support for over 30,000 unit conversions, and over 160 currencies with live exchange rates. It also allows users to store favorite conversions for quick access and provides answers in fractions where needed, with results up to 5 decimal places.

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free metric conversion tool