Simple Calculator
A free, fast online calculator for everyday math — addition, subtraction, multiplication, division and percentages.
A Free Simple Calculator for Everyday Math
This simple calculator handles the everyday math you'd normally reach for a phone or desktop calculator app for: addition, subtraction, multiplication, division and percentages. It runs entirely in your browser, works on mobile and desktop, and needs no download or sign-up.
Looking for something more specific? CalcVault also has dedicated calculators for loan EMI, compound interest, currency conversion and forex position sizing.
Frequently Asked Questions
Is this calculator free to use?
Yes, completely free, with no sign-up, no download and no usage limits.
Does it work on mobile phones?
Yes. The calculator is fully responsive and works the same way on phones, tablets and desktop browsers.
How do I calculate a percentage?
Enter the number, press the % button to convert it to a percentage of the current value, then continue your calculation as needed.
Is my calculation data stored anywhere?
No. All calculations happen locally in your browser and are never sent to or stored on any server.