Calc ProUnit Converter for iPhone, iPad, Mac & Android
Over 6,000 conversions in 37 categories, from everyday cooking measurements to engineering units. Search for a category, pick your units and get the answer instantly.
Take it with you
Free with ads · In-app purchase unlocks the full Pro Premium version
Unit Converter Features
Features marked Pro Premium unlock with the Pro Premium in-app purchase in the app. Every feature is free to use in your browser.
19 everyday categories
Length, weight, temperature, volume, area, speed, time, cooking, fuel economy, data storage and more.
18 specialist categoriesPro Premium
Voltage, resistance, frequency, viscosity, radiation dose, thermal conductivity, typography and more.
Search categories
Find the category you need fast with built-in search.
Convert both ways
Enter a value on either side and switch direction with the From and To keys.
Every unit at once
On iPad and Android tablets, see your value converted into every unit in the category side by side.
Built-in keypad
A full keypad with operators, so you can do the math before you convert.
Great for
- Cooking and baking
- Travel
- Science and engineering
- DIY and home projects
Frequently Asked Questions
How many units can Calc Pro convert?
Over 6,000 conversions across 37 categories. The 19 everyday categories are included free, and 18 specialist categories, such as frequency, voltage, viscosity and thermal conductivity, unlock with Pro Premium.
Can it convert cooking measurements?
Yes. Cooking is one of the 19 free categories, so you can convert recipe measurements in seconds.
Is Calc Pro free?
Calc Pro is a free download for iPhone and iPad on the App Store and for Android on Google Play and the Galaxy Store, supported by ads. The Pro Premium in-app purchase unlocks the full version, including crypto rates, PDF export, and the newest financial worksheets, unit categories, constants and statistics tools. The Mac app has no ads: it starts with a free 7-day trial of everything, then needs Pro Premium.
Is Calc Pro available on Android?
Yes. Calc Pro is available on Google Play for Android phones and tablets, and on the Galaxy Store for Samsung Galaxy devices.
Is Calc Pro available on Mac?
Yes. Calc Pro for Mac is on the Mac App Store. It has no ads and starts with a free 7-day trial of every feature. After that, Pro Premium unlocks it. It's the same one-time purchase as on iPhone and iPad, so if you've already bought Pro Premium there, restore it on your Mac at no extra cost.
More in Calc Pro
Download Calc Pro
Calc Pro combines 10 powerful calculators with 23 financial worksheets. It's the trusted choice of students, professionals, and investors worldwide, and the only app that can truly replace your pocket calculator. Now with support for iPhone Duo.
Free with ads · In-app purchase unlocks the full Pro Premium version
Or use the Unit Converter free in your browser