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Unit Converter - Convert all

Unit Converter - Convert all

Measurements & Calculations

14K ratings
558 reviews
With Ads
🔧 Utilities
✈️ Travel
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • February 21, 2011
  • September 29, 2026

Features

Developer

oWorld Software
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Unit Converter - Convert all screenshot #7 for iPhone
Unit Converter - Convert all screenshot #8 for iPhone
Unit Converter - Convert all screenshot #9 for iPhone
iphone
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🧾$0.99 - $29.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐558
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🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 6 days
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About

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 conversions
✓Extensive unit categories (weight, temp, length, volume, etc.)
✓Simple and intuitive interface
✓Supports international currencies
✓Includes time, speed, and IT units
✓Unlockable premium units
Show original description

What users say

Summarized from real user reviews of Unit Converter. Based on 14K reviews and a 4.6/5 average, it highlights the 7 positives and 6 negatives reviewers mention most about this Travel app.

Positive things

  • 🚀Easy to use
  • 🚀Comprehensive unit conversions
  • 👍Helpful app
  • 👍Practical for engineering and mechanics
  • 👍Intuitive interface
  • 👍Extremely useful
  • 👍Convenient and always available

Negative things

  • 🔍Too many ads
  • 🔍Ads make the app unusable
  • 🔍Ads are invasive and disrupt user experience
  • 💰Expensive subscription for ad-free version
  • 🐛Crashes and stability issues
  • 🔍Ads block access to features
See all reviews
+2

What's New in Unit Converter

3.0.28

September 29, 2026

What's new: • Favorites are back: all your favorite units on one screen, grouped by category. Pick a unit and see every conversion at once. Manage them from Settings. • New Finance section with a Salary converter (hourly, monthly, yearly…) and a Fuel price converter ($/gal to €/L). • New categories: Water hardness, Earthquake magnitude (Richter) and Seismic energy. • Siri & Shortcuts: convert units and currencies with your voice. • Reorder category sections from Settings. • Better unit name translations and bug fixes.

More
12

Subscriptions & In-App Purchases

Get premium

No ads, all conversions and future updates.

$14.991 Year
7 Days trial
Price Updates
September 20, 2026→$14.99
June 26, 2026→$5.99
June 22, 2026→$9.99
June 19, 2026→$9.99
How to cancel Unit Converter subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

All around great app!

I’m always having to convert kilograms, pascals, mm, etc for work along with various other things and it’s much more convenient than searching it separately. I’ll never use another unit conversion app again! Love it!
HVAC JourneymanHVAC Journeyman

Poor

Couldn’t get past the ads

Using an iPhone 15 pro and the latest iOS
@palgrave44@palgrave44

Response from developer

Sorry about that. An ad should close with the X after a few seconds, if it doesn't it's a bug of the ad network. Could you write me from the app with your iPhone model? I will report it. The Pro option in the settings removes all the ads.

APP REVIEW

Too many pop-up ads from China
mitchk58mitchk58

So many pop-up ads

There are so many pop-up ads that at time the app is unusable.
Dogbert64Dogbert64

The ad’s are too much!!

This would be a handy app if not for the ad’s!
Jestertl5.0Jestertl5.0
See 553 more reviews

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User experience

🐞

Reported Bugs

3 issues

Conversion calculations are sometimes inaccurate

Bug

Inability to enter decimal values in some conversions

Bug

Compatibility issues with newer devices

Bug
✨

Requested Features

4 requests

Dark mode option

Feature

Favorites/frequently used units

Feature

Improved ad-supported free version

Feature

More customization options

Feature

FAQ

What does the Conversion Calculator app do?

This app functions as a comprehensive unit and currency converter. It allows users to easily convert between various units of weight, temperature, length, volume, time, speed, and more. It also provides real-time currency exchange rates for international currencies.

What are the key features of this conversion app?

Key features include real-time currency conversions with live exchange rates, a wide array of unit categories such as weight, temperature, length, and volume, and an intuitive interface for quick conversions. It also supports specialized units for IT, energy, and fuel consumption.

How much does the Conversion Calculator app cost?

The app is free to download and use, with ads displayed. Users can opt for 'Converter Premium' via an auto-renewable subscription to remove ads and unlock additional units. Subscription options include a 1-year renewal for $9.99 (with a 7-day free trial) or a 1-month renewal for $0.99.

What types of units can be converted?

The app supports a vast range of units including weight (ounces, pounds, kilograms), temperature (Celsius, Fahrenheit, Kelvin), length (miles, kilometers, feet, meters), volume (liters, gallons, cups), time, speed, computer memory, energy, fuel consumption, and electricity. It also includes currency conversions for major global currencies and cryptocurrencies.

Who would benefit from using this app?

This app is ideal for cooks, contractors, DIY enthusiasts, travelers, students, and anyone who frequently needs to convert measurements or currencies. Its ease of use and comprehensive conversion options make it a valuable tool for everyday tasks and international dealings.