Radius Calculator 4+

MaoWare Corporation

Designed for iPad

    • $1.99



Radius Calculator allows you to calculate the radius, central angle, arc length, and circumference from the span / chord and rise of an arc segment. Built-in unit converter makes it to work with any length unit (including inches, feet, centimeters, meters, and many more).

Simply enter the span / chord and the rise to arc in your choice of units. Then pick the output unit unit and the radius, central angle, arc length, and circumference are instantly computed.

Designed for the multiple trades in the construction industry, this calculator is great for any craftsman who needs to find properties of a circle given curve measurements. In particular, Radius Calculator is perfect carpenters or cabinet makers who deal with curved walls.

Note: There is no closed form solution for the central angle and we use a common approximation for that calculation. This method is very accurate for small angles and about 10% off on large angles approaching 180 degrees.

What’s New

Version 7.0.0

- iOS 12 support
- iPhone XR/XS/XS Max support

Ratings and Reviews

4.8 out of 5
59 Ratings

59 Ratings

Sharon (WoodChick) ,

Incredibly Useful and Efficient

I do a lot of radius woodwork. This app saves me from waiting until I get back to my desk to figure out the radius of whatever project I'm producing.
I recommend this to anyone in construction. It surely has other uses as well for other trades.

Ou812oip ,


Awesome app . Best thing since sliced bread!

dsj oh cle ,

X /2) / (y*2) + (y/2) = R

Not bad but it would be better if you could type in
Fraction up to 32s at least

App Privacy

The developer, MaoWare Corporation, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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