Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Units - Free Unit Converter by Homegrown Software Ltd, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Units - Free Unit Converter

By Homegrown Software Ltd

Open iTunes to buy and download apps.


Units is a really useful app that lets you easily convert from various units into lots of others.

NEW: Units now supports doing quick conversions on Apple Watch. Perfect for currency conversions on holiday, or any other calculations you need to do quickly throughout your day.

Units can convert hundreds of units from 43 different categories including Speed, Time, Length, Volume, Area, Power, Temperature, Fuel Consumption, Shoe Sizes and loads more!

Units is now a fully universal app with native support for iPhones, iPod touches and iPads.

As an added bonus, Units also has a built in ruler, for doing small, quick measurements when the need arrises.

• Convert hundreds of units - Units has over 800 units across 43 different categories.
• Convert currency - Units can convert between 88 different currencies, with rates updated daily.
• Hide unused units - Units lets you hide units you don't use, allowing you to maintain a streamline conversion workflow.
• Built in ruler - Units has a built in ruler allowing you to make small, quick measurements without carrying round a ruler.

Also available: Units Premium disables adverts and allows you to reorder both units and unit categories to suit your needs.

What's New in Version 2.4.1

Fixed a crash affecting iOS 7 users.


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3

Customer Reviews


This is one fantastic app. It can convert almost any measurement that one can think of (I.e. Do you know how many cubic inches your new 3.0 liter car engine is?) This app will figure it out for you long before you can begin to find the formula. Best of all, it's totally FREE!

Since I first wrote the above review, I still find this to be one of if not the best and most useful apps ever offered. IT'S TOTALLY FREE & it really works on most any conversion that most can think of. If you paid for another "Conversion App" then you OVERPAID! I haven't found any app that works as well or is as easy to use as this one. Do yourself a huge favor and download it right away. You will find yourself using it often. To the writers of this app I wish to say, "Many thanks for a most useful, accurate, and free app!"

Cry babies

Everyone who really likes the app and left one star because of technical issues that they more than likely were unaware of, are a bunch of crybabies! And the other crybabies whining about the ruler, come on now give me a break, get a ruler this is a converter app! The only person that has a valid complaint is of the climber and I hope they fix the issue for you other than that this is a pretty good app. I have been using it for years and it hasn't disappointed me yet. To be honest the ruler is kind of stupid. but maybe that's because I have measuring tapes in at least three of the rooms in my house

Crashes on numerical entry has been fixed

This is a very useful app with lots of conversion types included. I frequently use the the Computer Data & Computer Data Flow Rate sections.

Thanks to the developer for quickly addressing the problems in the previous version!

Units - Free Unit Converter
View in iTunes
This app is designed for both iPhone and iPad
Offers Apple Watch App for iPhone
  • Free
  • Category: Utilities
  • Updated:
  • Version: 2.4.1
  • Size: 5.5 MB
  • Apple Watch: Yes
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: