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Natural Units is a specialized unit converter that lets you quickly convert between distance, time, mass, energy, and temperature. Enter a value in one unit and instantly see the values of the other four converted units. You can even load values from a set of commonly used constants or add your own.

**Important Note**
Distance and time are inversely related to mass, energy, and temperature, so understand that Natural Units displays the inverse value when converting between these sets of units. For example, if you enter a value X in cm and Natural Units displays a result Y in Joules, the actual converted value would be 1/(Y Joules).

What’s New

Version 1.3.1

• Fixed an issue where the app wouldn't work in certain locales.
• Fixed an issue where pressing "Clear" button wouldn't update other values.

Ratings and Reviews

3.0 out of 5
1 Rating

1 Rating

ElwoodBlues ,


It's hard to imagine this would be of use to anybody but the tiny fraction of the population who happens to be a theoretical physicist who is not near a computer and yet who needs to convert units. Be aware, this isn't what you want if you're looking to convert between units in the way you normally think about them, e.g. going from kilograms to pounds. This is for going between, say, meters and Joules. That's impossible, you say? Well, if you think so then you're not the aforementioned target audience. Which, I'm pretty sure, is about ten people.

jharrowmom ,


Easy and intuitive to use. Highly recommended.

HEP theorist ,

app perfection

Amazing, intuitive and highly useful


Erik Hinterbichler
1.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2014 Erik Hinterbichler


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