Polygon: Inertia, Centroid
Easy and Fast calculations
About
Calculate complex properties of any polygonal figure, including centroids, moments of inertia, and perimeter. Simply input vertex coordinates for instant results, saving significant time on tedious calculations.
What's New in Polygon
3.9.4
August 25, 2026
Performance improvements and support for the following languages has been added: Turkish, Vietnamese, Thai, Swedish, Indonesian, Dutch, Danish, and Norwegian.
MoreSubscription plans
Pro Access
Pro Access
In-App Purchases
$9.99
Pro Access
Pro Access
Developer apps
FAQ
What calculations does Polygon offer?
Polygon calculates polygon centroids, moments of inertia (Ix, Iy, Ixy), polar moment of inertia, radius of gyration, principal moments of inertia, area, perimeter, and side lengths. It can also incorporate hollow sections and allows for custom axis rotation and definition.
How do I use Polygon?
You simply enter the coordinates of the vertices of your polygon into the app and press the calculation button. The app will then instantly provide all the calculated properties.
What devices is Polygon available on?
Polygon is available on iPhone and iPad devices.
What is the age rating for Polygon?
Polygon has an age rating of 4+, making it suitable for a wide range of users.
How much does Polygon cost?
Polygon is free to download and use. It offers optional in-app purchases for Pro Access subscriptions.
What are the subscription options for Polygon?
Polygon offers Pro Access subscriptions at $2.99 per month, $4.99 for six months, and $6.99 annually. These subscriptions automatically renew unless turned off at least 24 hours before the current period ends.
Can I cancel my Polygon subscription?
Yes, you can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase. However, no cancellation of the current subscription is allowed during the active subscription period.
Does Polygon have ads?
No, Polygon does not contain advertisements. The app is ad-free.
