Online Calculator
A free online calculator for addition, subtraction, multiplication, division, percentages, powers, roots, trigonometry and logarithms — with memory keys and history.
Files never leave your device Instant results 100% free No sign-up
How to use the Online Calculator
- Enter your values in the form.
- Results and charts update instantly as you type.
- Tweak inputs to compare scenarios side by side.
Private & secure
Processing happens locally with JavaScript, Canvas and Web APIs.
No uploads, no storage, no account. Close the tab and it is gone.
Works on desktop and mobile in any modern browser.