Pi Calculator
Calculate circle properties using Pi.
How to use Pi Calculator
1
Measure the radius
Measure the circle's radius as accurately as possible.
2
Enter the value
Enter the radius into the calculator field.
3
Calculate the result
Press calculate to get the circumference and area.
What is Pi Calculator?
In the realms of geometry, physics, and engineering, accurate circle calculations are fundamental. The Pi Calculator helps you work out a circle's circumference and area from a measured radius without manual formula juggling. It is useful when you need a quick browser-based reference for classroom work, lab projects, or everyday problem solving.
Key Features
- 100% Browser-based
- Privacy-focused processing
- Fast and lightweight
- No registration required
- Free forever
Frequently Asked Questions
What if I only have the diameter?
Divide the diameter by 2 to get the radius before entering it into the calculator.
Which formulas does the tool use?
It uses circumference = 2πr and area = πr².
Does it use an accurate value of pi?
Yes. The calculation uses JavaScript's built-in Math.PI value.