Calculator
Free calculator for addition, subtraction, multiplication, and division. Fast, no signup, works right in your browser.
Online Calculator — Free in Your Browser
Our calculator offers all the functions of a classic desk calculator — right in your browser, no installation, no registration. From simple arithmetic to scientific functions.
Basic Functions
Addition, subtraction, multiplication, and division with full precision. Input via mouse clicks on the buttons or directly via keyboard. Decimals, negative numbers, and parentheses are supported.
Memory Functions
- M+ — Add current value to memory
- M- — Subtract current value from memory
- MR — Recall stored value
- MC — Clear memory
Scientific Mode
The extended mode offers trigonometric functions (sin, cos, tan and their inverse functions), logarithms (log, ln), powers, roots, factorial, and the constants Pi and e. Switchable between degrees and radians.
History and Keyboard Controls
Every calculation is saved in history — you can reuse previous results. Full keyboard support makes the calculator as fast as a physical one: digits, operators, Enter to calculate, Escape to clear.
When Do You Need an Online Calculator?
- Quick calculations without opening a separate app
- Computing directly in the browser at your desk
- Storing intermediate results with M+ for further calculation
- Scientific calculations for school or university
- Percentage key for quick discount or VAT computations