Scientific Fraction Calculator gives you the power of a portable calculator on your iPad or iPhone with full decimal and fraction capability! And now it even speaks!

It’s perfect for use in a math class where answers are required to be expressed exactly as fractions. Or perhaps you just need to add up some fractional measurements from a tape measure – the calculator can do that for you with ease.

You can enter numbers in either decimal notation (such as 2.5) or as fractions (such as 3/4). The program will accept mixed fractions (2 1/2 can be entered as 2/1/2) or it will accept improper fractions (such as 14/3). Once the calculation is complete you can instantly convert decimals to fractions and fractions to decimals just by pushing the "a b/c" key.

Features include:

Speech: each touch and the entire result is read aloud!
Standard add, subtract, multiply, and divide
Memory (M+/M-/MC/MR)
Trig functions (sin/cos/tan and inverse functions)
Hyperbolic functions
Cube and square roots
Power functions
Log functions
Degrees/Radians/Gradians modes
Click sound (which can be muted or turned off)
History display to show long calculations
Optimized algorithms produce more accurate results than most other calculators
Setup screen for customizing the app.

Additional iPad features:

Full functions in both landscape mode and portrait mode
History “tape” retains prior calculations – scroll it upwards to see many more lines
Use results from the history tape in new calculations just by selecting them
Switch the history tape from left to right. . . perfect for lefties!

Scientific Fraction Calculator is written by Bill Hogue who created games for the TRS-80, Atari, and Commodore platforms in the 1980s under his “Big Five Software” brand. Bill’s most popular titles include “Miner 2049er” and “Bounty Bob Strikes Back”.

What's New

Version 2.8

iOS 9 changes

Ratings and Reviews

3.9 out of 5

7 Ratings

7 Ratings

Great calculator


I find this calculator has most of the functions I use at home. I especially like the history and the editing capabilities.

Better than plain

Vain Butcher

I like the blue color.
The tracking of your inputs is very helpful.
All around a good job.
No doubt worth a buck!



Excellent calculator. Great for general math and also fo engineering. Highly recommended.


Bill Hogue
24.7 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Copyright (c) 2015 by Bill Hogue


  • Family Sharing

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