Free tools for students & teachers
Geometry Formula Library & Calculators
Every core geometry formula in one place: distance, area, volume, slope, and more. Each page has a fast calculator, step-by-step work, and a clear explanation of why each formula works.
Browse by topic
Five core areas of school and college geometry, each with reference pages and calculators.
Popular geometry calculators
Start with the distance formula calculator or pick another available calculator below.
Why Solve Formulas
Fast, accurate calculators
Every tool runs instantly in your browser with validated inputs and clear step-by-step working.
Proofs and derivations
We explain why each formula works, not just how to plug in numbers. Built for real understanding.
Made for students
Written for high-school and college learners, teachers and SAT/ACT test-prep with worked examples.
Reviewed and sourced
Content is checked against standard references and updated so you can trust what you read.
Get the free geometry cheat sheet
One printable PDF with every formula on this site. No spam, just the math.