Proportion Solver is a simple, convenient tool to solve proportions. Proportions are useful for computing a value based on numerical relationships (e.g. width/height, Fahrenheit/Celsius, mph/meters, U.S. Dollars/Euros, pixels/inches).

What’s New

Version 3.1

- Added support for iPhone X

Ratings and Reviews

4.4 out of 5
14 Ratings
14 Ratings
Pixelpusher636 ,

Potential to be Amazing

If we could assume that some of the people wanting this app (like myself) were idiots and provide some basic info on using this it would be amazing. I know the tasks I could use this for but not the slightest idea how to achieve it using this app. The screenshot previews provide no help either. In fact they only further the confusion. For example. The x sign in the second screenshot top right field. How is that there? I assumed if I hit the +/- button I could get there but alas, no dice. Please help. I went to your website for help and then tried to find a contact form. I don't use Twitter or Google plus so that brings me back to here.

IrritableBadger ,

Absolutely Perfect

If you regularly deal with proportional scaling of very large or very small things this is a perfect tool that eliminates cumulative errors that creep into complex scaling.

No frills, no preconceived or assumed ways it will be used. Just a simple and effective solution to an annoying task.

kcamrn ,

The best Ratio Calculator

I use this for resin ratios in my workshop, one of my most used apps. It would be wonderful if there was Apple Watch support so I could ask my watch to calculate ratios while using gloves and operating equipment.


Ryan Ashcraft
16.9 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2017 Ryan Ashcraft


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

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