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Best Calculator Converter Metric Apps

239+ iOS apps curated and reviewed

4.7 avg rating
19 free apps
Updated August 2026

Whether you're new to calculator converter metric or looking for an upgrade, our curated collection of 239+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Calculator Converter Metric Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Metric Conversion toolMetric Conversion toolFree4.8★ (15K)NoNoAug 2026
2Converter-Universal ConversionConverter-Universal ConversionFree4.9★ (897)NoNoAug 2026
3Convert Any Unit LiteConvert Any Unit LiteFree4.7★ (48K)YesNoAug 2026
4Converter+ (Units, Currencies)Converter+ (Units, Currencies)Free4.7★ (2.4K)NoYesAug 2026
5Unit Converter - Best Unit AppUnit Converter - Best Unit AppFree4.8★ (192K)YesYesAug 2026
6Calculator: EasyCalcCalculator: EasyCalcFree—YesYesJul 2026
7CalConvert: Pro Calculator $€CalConvert: Pro Calculator $€$24.994.6★ (299)NoNoAug 2026
8Unit Converter, 50+ CalculatorUnit Converter, 50+ CalculatorFree4.3★ (53)NoYesMay 2026

Top Picks for Calculator Converter Metric

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
Converter-Universal Conversion#2

Converter-Universal Conversion by Trelleborg Sealing Solutions

Strong Contender
🔧 Utilities
4.9😊(897 ratings)
Free
Converter-Universal Conversion screenshot 1
Converter-Universal Conversion screenshot 2
Converter-Universal Conversion screenshot 3
Converter-Universal Conversion screenshot 4
Converter-Universal Conversion screenshot 5

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.

What We Love

  • 👍 Easy to use
  • 🚀 Accurate and fast conversions
  • 💡 Comprehensive coverage of units and categories
  • 🔒 No ads or hidden fees

Room to Improve

  • 🐛 Currency conversion rates can be outdated
  • 🔍 Difficult to find specific conversions due to large number of options
  • 💡 Lack of ability to set favorite conversions as default
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 Calculator Converter Metric apps to explore

4
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
(2.4K)
free with in-app purchases
5
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Convert All Units and Currency
Free

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.

20 conversion categoriesLive currency updates155 world currencies
✈️ Travel
(192K)
free with in-app purchases
6
Calculator: EasyCalc
Calculator: EasyCalc
Calculator: EasyCalc
Smart Calculator & Converter
Free
🔧 Utilities
(0)
7
CalConvert: Pro Calculator $€
CalConvert: Pro Calculator $€
CalConvert: Pro Calculator $€
Currency Metric Unit Converter
$24.99

This app offers a powerful scientific calculator, extensive unit conversion capabilities across dozens of categories, and real-time foreign exchange rates for over 150 currencies. It also includes a world clock and convenient home screen widgets for quick access to its functions.

Advanced scientific calculatorExtensive unit conversions (600+ units)Real-time currency exchange rates (150+ currencies)
💰 Finance
(299)
paid
8
Unit Converter, 50+ Calculator
Unit Converter, 50+ Calculator
Unit Converter, 50+ Calculator
All in one Unit Calculator
Free

This app offers a comprehensive solution for converting various units, including currencies, measurements, and more. With over 45 converters in a single, user-friendly interface, it simplifies calculations and saves device storage. It works offline and supports over 150 international currencies.

All-in-one unit conversion45+ free convertersCurrency converter (150+ currencies)
🔧 Utilities
(53)
free with in-app purchases
9
Conversion Calculator - Metric
Conversion Calculator - Metric
Conversion Calculator - Metric
Unit Converter & Measurements
Free

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

Metric and imperial unit conversionWeight, length, temperature, area, timeOffline functionality
🔧 Utilities
(157)
free with in-app purchases
10
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
(977)
free with in-app purchases
11
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
12
Calculator: Pro
Calculator: Pro
Calculator: Pro
Plus Calc for iPad & iPhone
Free

This app offers a versatile calculator with both basic and scientific functions. It includes advanced features like currency and unit conversions, customizable themes, and history tracking. Optimized for both portrait and landscape modes, it's designed for users needing precise calculations and conversions.

Basic and scientific calculatorCurrency converterUnit converter
📊 Productivity
(579)
free with in-app purchases
13
Unit Converter – Metric Calc
Unit Converter – Metric Calc
Unit Converter – Metric Calc
Scientific & Imperial Units
Free
$0.99 | 100% OFF

This application offers a comprehensive suite of tools for converting between various scientific and imperial units. It supports over 20 categories, including length, weight, temperature, and electrical units, with high precision and offline functionality. Optimized for both professional and everyday use, it provides real-time conversions and supports dark mode.

20+ conversion categories8-decimal precisionFully offline functionality
🔧 Utilities
(12)
ad-supported
14
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
15
Calculator +
Calculator +
Calculator +
Graphing, Percentage, Triangle
Free

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

Free basic and scientific calculatorIntuitive interface with equation and result displayFraction and percent support
🔧 Utilities
(10K)
free with in-app purchases
16
Feet Inch Calculator: Convert
Feet Inch Calculator: Convert
Feet Inch Calculator: Convert
Unit Converter & Metric Tool
Free
🔧 Utilities
(0)
17
Units - Conversion Calculator
Units - Conversion Calculator
Units - Conversion Calculator
Unit & Currency Converter
Free
📊 Productivity
(0)
18
Calculator : AI Math & Convert
Calculator : AI Math & Convert
Calculator : AI Math & Convert
Convert Units & Solve with AI
Free

This app offers a comprehensive suite of calculation tools, including standard, scientific, and AI-powered math assistance. It also features a unit converter, financial calculators, and time/date tools, all within an intuitive interface. Users can access calculation history and customize themes for a personalized experience.

AI Math Assistant for instant answersStandard and Scientific calculationsUnit converter for various units
🔧 Utilities
(8)
free with in-app purchases
19
Unit Converter
Unit Converter
Unit Converter
Conversion Calculator
Free

This app offers a wide range of unit conversions for various measurements, from temperature to length. It features a user-friendly interface, customizable themes, and smart features that remember your frequent conversions. It also links to external apps for specialized tasks.

Broad conversion spectrumPersonalizable themesUser-friendly interface
🔧 Utilities
(13)
free with in-app purchases
20
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

FAQ about Calculator Converter Metric

What are the best calculator converter metric apps for iPhone?
Metric Conversion tool tops our calculator converter metric apps ranking as of August 2026, with a 4.8-star average from 15K App Store ratings, and it's free to download.
Yes — 19 of the top calculator converter metric apps we rank are free to download, including Metric Conversion tool and Converter-Universal Conversion.
Metric Conversion tool has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 239+ calculator converter metric apps on the iOS App Store as of August 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.