Radical PieTM

About Radical Pie

Radical Pie is a professional equation editing application for Windows 10/11 that produces mathematical typography of the highest possible quality. It’s suitable for use in the most demanding technical documents ranging from conference papers to large textbooks. It’s also designed to be a perfect solution for putting equations in slide presentations and YouTube videos.

If you’re a fan of the classic versions of MathType, then you’ll feel right at home in Radical Pie. Except now, you’ll be using the modern alternative with access to the next generation of WYSIWYG equation editing features, and you’ll get superior results across the board.

Learn more about the features of Radical Pie, including its unique drawing and annotation capabilities.

See a comparison of Radical Pie with classic MathType 7 and the Office Math equation editor built into Microsoft Word.

Licensing Model

Radical Pie is sold under traditional software licensing terms for $60. You purchase it once, and the version you bought works forever. No subscriptions. No signing in. No connecting to a server on the internet.

Documentation and Help

See the Radical Pie documentation for information about using the software. You can also join the Discord server if you’d like to ask questions.

Conferences

We are an official sponsor of the Joint Mathematics Meetings in Washington, D.C., January 4–7, 2026. See us at booth #505 for live demos, textbooks made with Radical Pie, and free giveaways.

Examples

Here are a few examples of equations created in Radical Pie with added drawings and annotations. These are actual SVG files generated directly by Radical Pie. They contain embedded equation data, so it’s possible to open them in Radical Pie and continue editing.

This is the rendering equation used in 3D graphics. Drawing objects like the green highlighting and various arrows are attached to anchor points in the equation. This means that when the equation is edited and the anchor points move, and the objects you’ve drawn dynamically adjust to the proper size and position in relation to the parts of the equation you originally attached them to.

The following is the formula for a general circle in 3D conformal geometric algebra. The colored text appearing in this example and the previous example are called annotations, and these can be attached to anchor points on drawing objects. Each annotation can be something simple like a text label or an arbitrarily complex mathematical expression.

This is an 8 × 8 matrix illustrating an exomorphism transformation in 3D exterior algebra. The lines and colored boxes were attached to anchor points inside the matrix, and annotations were attached to label all of the parts.

The files for the above examples and several more are available here:

• Download Example Files

History

Radical Pie was developed by noted computer scientist Eric Lengyel throughout 2025 as the spiritual successor to classic MathType, which is no longer maintained. More about the motivation and development process can be found in his blog post.