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Calca is a powerful symbolic calculator that updates as you type, giving you instant answers. It solves equations and simplifies complex expressions. It is also a rich Markdown text editor so that you can explain your ideas alongside your calculations.

Calca is perfect for professionals and students - anyone who works with numbers and equations. Variables and functions can be created with only a few keystrokes and can be manipulated with a rich library of operators and functions.

All calculations are stored as plain text so you can easily share them with other editors and move them from device to device. Calca more...

What's New

Version 1.2.2:
  • Performance and stability improvements.
  • Added Calca file type to make opening documents from Finder easier.
  • Fixed input of special characters.


OS X 10.6 or later

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Calca User Discussion

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Widber Member IconReview+9

Nice app in principle but there is no possibility to change the number format. If you can live with the numbers in the US-format and English language only - this is a good choice. But the rest of the world still have to wait for the support of different number formats.

Reply4 replies
Version 1.1
Manfred Bergmann

There are other number formats.
Add "@de-DE" at the top of the file and you'll have german number formats.
For example.


Thanks Manfred! This trick works.
Moreover, now when I create a new document I get automatically "de-DE" in the first row. I think this is a feature of v. 1.2

Manfred Bergmann

This isn't a trick.
AFAIR this works and is in the documentation at least since 1.1.


Prior to v.1.2 I never had "@de-DE" on creating of new file. Maybe it was a bug.

Donperreault Member IconReview+602

This application is awesome. It's a text editor that supports markdown and operate's similar to a spreadsheet. You can calculate simple arithmetic, functions, equations and complex expressions right inside your text. Change a number and Calca auto recalculates. Very similar to Soulver which I was using prior to purchasing Calca but Calca integrates much nicer with your text and is cheaper than Soulver.

This is the best $5.00 I spent on an application in a long time. I often complain that many developers overcharge for applications that you only use occasionally. I personally would have paid $10 or $15 for this gem.

BTW: I am in know way affiliated with the developer. I have never met or spoke to him/them/her!

Reply0 replies
Version 1.1
user icon+9
Version 1.2.2
user icon+9
Version 1.2
> 4 4


Current Version (1.x)


Downloads 490
Version Downloads 105
License Commercial
Date 14 May 2014
Platform OS X / Intel 32
Price $4.99