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Best Metric Conversion Calculator Apps

250+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated July 2026

If you already know Metric Conversion tool, this is the deeper bench. 250+ metric conversion calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Metric Conversion Calculator 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★ (190K)YesYesAug 2026
3Calculator₊Calculator₊Free4.7★ (1.7M)YesYesAug 2026
4Unit Converter - Convert allUnit Converter - Convert allFree4.6★ (13K)YesYesAug 2026
5Convert Any Unit LiteConvert Any Unit LiteFree4.7★ (47K)YesNoAug 2026
6Conversion Calculator PlusConversion Calculator PlusFree4.7★ (15K)YesYesJul 2026
7Conversion Calculator UnitsConversion Calculator UnitsFree4.7★ (4.8K)YesYesAug 2026
8Units - Conversion CalculatorUnits - Conversion CalculatorFree—NoNoJul 2026

Top Picks for Metric Conversion Calculator

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😊(190K 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

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
Calculator₊#3

Calculator₊ by Impala Studios

Basic, Scientific, Plus Calc
Worth Considering
🔧 Utilities
4.7😞(1.7M ratings)
FreeAdsIn-App Purchases
#97in Utilities
Calculator₊ screenshot 1
Calculator₊ screenshot 2
Calculator₊ screenshot 3
Calculator₊ screenshot 4
Calculator₊ screenshot 5
Calculator₊ screenshot 6

This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.

What We Love

  • 💻 Useful calculator features
  • 🎨 Customizable backgrounds and themes
  • 📚 Helpful history tracking

Room to Improve

  • 📺 Intrusive full-screen ads
  • 💰 Expensive subscription model
  • 🔍 Ads blocking calculator functionality

More Metric Conversion Calculator apps to explore

4
Unit Converter - Convert all
Unit Converter - Convert all
Unit Converter - Convert all
Currency, Temperature, Length
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
5
Convert Any Unit Lite
Convert Any Unit Lite
Convert Any Unit Lite
Units & Currency Converter
Free

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.

Intelligent unit search with autocompleteAutomatic category selectionIntegrated calculator
✈️ Travel
(47K)
ad-supported
6
Conversion Calculator Plus
Conversion Calculator Plus
Conversion Calculator Plus
Unit Converter
Free

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.

Unit and currency conversionSupports 160+ currencies (real & crypto)Automatic currency exchange rate updates
📊 Productivity
(15K)
free with in-app purchases
7
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
8
Units - Conversion Calculator
Units - Conversion Calculator
Units - Conversion Calculator
Unit & Currency Converter
Free
📊 Productivity
(0)
9
Onsite Calculator
Onsite Calculator
Onsite Calculator
by Cristony Bruno Tomporoski da Silva
Free
🔧 Utilities
(0)
10
Haze Scale: Measure Metric
Haze Scale: Measure Metric
Haze Scale: Measure Metric
by TASERIYAT NUMANYAT
Free
🔧 Utilities
(0)
11
Dad's Calculator
Dad's Calculator
Dad's Calculator
A calculator for daily life
Free
🔧 Utilities
(0)
12
Calculator - CalcSphere
Calculator - CalcSphere
Calculator - CalcSphere
Calculator & Converter
Free
📚 Education
(0)
13
Calculator- scientific
Calculator- scientific
Calculator- scientific
Advanced Math for Everyone
Free
🔧 Utilities
(0)
14
Feet Inch Calculator: Convert
Feet Inch Calculator: Convert
Feet Inch Calculator: Convert
Unit Converter & Metric Tool
Free
🔧 Utilities
(0)
15
Calculator²
Calculator²
Calculator²
by Richard Walters
Free

This app offers a suite of specialized calculators, including scientific, financial, programmer, and basic functions. It also features a currency converter and a comprehensive unit converter for various needs.

Scientific calculator with advanced functionsFinancial calculator for loan and tax calculationsProgrammer calculator for number base conversions
📊 Productivity
(0)
free with in-app purchases
16
Precision Metric - Converter
Precision Metric - Converter
Precision Metric - Converter
by Eastchester Group Ltd
Free
🔧 Utilities
(0)
17
Metric Practice
Metric Practice
Metric Practice
by Carolina Biological Supply
Free
🛍️ Shopping
(0)
18
Length Measure Converter
Length Measure Converter
Length Measure Converter
Fast & Easy Unit Conversion
Free
📚 Education
(0)
19
Metric Converters
Metric Converters
Metric Converters
Metric Prefix Conversions
$0.99
🔧 Utilities
(0)
20
Convert Units: Unit Conversion
Convert Units: Unit Conversion
Convert Units: Unit Conversion
Metric to US Converter tool
Free

Easily convert between metric and imperial units for everyday needs. Offers a wide range of converters including currency, temperature, and length, with offline access and a favorites list for quick use.

Metric to imperial conversionsOffline accessFavorites list
🔍 Reference
(3)
ad-supported

FAQ about Metric Conversion Calculator

What are the best metric conversion calculator apps for iPhone?
Metric Conversion tool tops our metric conversion calculator 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 calculator 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 250+ metric conversion calculator 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.