Full-featured scientific & basic calculator
Type any arithmetic expression and get the result instantly (e.g. 25 * 4 + 100 / 2)
Our free online calculator helps you perform fast and accurate calculations. It supports basic arithmetic operations — addition, subtraction, multiplication, and division — as well as scientific functions like square (x²), square root (√), and percentage. Designed for quick results and ease of use, it works on all devices with no installation needed.
Click the buttons or use your keyboard to enter numbers and operators. Press = to see the result instantly. Use ⌫ to delete the last digit, C to clear everything, x² to square the current value, and √ to find the square root. For longer expressions, use the Basic Calculator panel on the right.
This calculator is fast, accurate, and works on all devices without any login or installation. It handles everything from simple sums to percentage calculations and square roots — perfect for students, professionals, and everyday use.