iPhone Screenshots


PEMDAS is an advanced scientific calculator with an easy-to-use interface for doing calculations with equations and variables. It is the touch version of PEMDAS Widget, an Apple Design Award winning Dashboard Widget.

The interface of PEMDAS is comprised of several tabs that let you work with equations and variables. The Keypad tab has a number pad, a function pad, and regular keyboard access to let you quickly type and calculate equations. PEMDAS saves all your equations and associated results until you clear them, and the History tab and provides one tap access to duplicating equations or using the results in new equations. PEMDAS auto-assigns variables to all calculations, which you can access in the Variables tab. You can clear the saved equations and results by tapping the clear button in the History or Variables tab, or by pressing and holding the clear button in the Keypad tab.

In addition, PEMDAS lets you switch between degrees and radians, and has support for percentages, trigonometric, hyberbolic, and logarithmic/exponential functions. You can also convert between hexadecimal, octal, binary, and decimal. PEMDAS also has several number formatting options; it lets you format the answer in scientific and engineering notation, has a preference for thousands separators, and lets you limit the amount of significant figures or decimal places displayed.

The website link below contains additional information and also overview videos of PEMDAS.

What's New

Version 1.6

- Updated to support the iPhone 6 and 6 Plus

Ratings and Reviews

4.3 out of 5
6 Ratings
6 Ratings

My Go-To Calculator


PEMDAS Touch is on my home screen, where it is quickly accessible. It is a powerful calculator in a deceptively simple interface, making it easily the most elegant and beautiful calculator of the many that I've tried.

PEMDAS misses five stars only for what it lacks by design. While custom variables can be defined and saved, there are not built-in physical constants pre-loaded. Likewise, this is not a graphing calculator, though I'd love to see a graphing calculator with the design of PEMDAS.

Great calculator!


This is a great calculator! The history and different functions available make it ideal for more complicated equations but I also use it to calculate my tips! It beats the iPhone's basic calculator by far. Very user friendly.

This app is so far off base


Nothing I put in this app gave a a real answer. Zero for zero.

Worst $5 I ever spent in the AppStore.


Michael Filippone
2.5 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2006-2014 Michael Filippone


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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