PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.

Includes an Apple Watch app, so you can calculate on your wrist!

What's New

Version 3.7.6

Added a new theme, "Dark Night".
Added support for measuring angles with grads in trigonometry functions.
Added an option to display SI prefixes in Engineering display mode.
Added a "Percentage Total" (%T) button to the layout editor.
Added a button to erase all settings and iCloud data.
Renamed "Use Constant Functions" to the more obvious "Repeat Operation on Equals”.
Fixed a problem searching for units in the conversion section.
Fixed a problem pasting values with a unicode minus sign.

Ratings and Reviews

4.7 out of 5

29 Ratings

29 Ratings

Lacking DMS parsing


A very pretty and competent calculator but as a land surveyor, I work extensively with Degrees Minutes Seconds and fractions of Seconds. I need to be able to input these as DMS and convert them to decimal degrees before applying trigonometric functions. The results of calculations often need to be converted back to DMS to obtain an angle or bearing.

Currently, this calculator doesn’t have this function (and its inverse) and is therefore a pain to use for this purpose.


Denny Tuckerman

I must say what an impressive piece of work this App is. I’m 69 now but I cut my programming teeth in the 70/80s on the HP-97 and HP-42S - this app exceeds their functionality, but in fairness to those Vintage calculators they were (and mine are still functioning ) running under 35+ years old technology.

Excellent Calculator


Excellent App with Excellent Support from developers. Easily a 5 Star App. The new update takes it to the next level and I shall purchase Macbook version in order to support development.


TLA Systems Ltd.
89.3 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 1992 - 2018 James Thomson
In-App Purchases
  1. Small Tip £0.99
  2. Medium Tip £1.99
  3. Large Tip £4.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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