Geometry Calculator
Calculate area and perimeter
Formulas
Circle: Area = πr², Perimeter = 2πr
Rectangle: Area = length × width, Perimeter = 2(length + width)
Triangle: Area = ½ × base × height, Perimeter = sum of all sides
Frequently Asked Questions
What does the Geometry Calculator do?
Calculate geometry instantly with this free online calculator. Useful for general tasks. Accurate results in your browser. No signup required. Enter your values above to see results instantly in your browser. This page is part of Try To Calculator's free online calculator collection.
Is the Geometry Calculator free?
Yes. Try To Calculator tools are free to use and do not require an account for this page.
Are my inputs sent to your servers?
No. Calculations run locally in your browser; we do not collect the numbers you type or the results shown.
Is the Geometry Calculator a substitute for professional advice?
This tool is for education and quick estimates. For medical, legal, tax, or financial decisions, confirm results with a qualified professional.