Free Online Scientific Calculator
A complete scientific calculator that runs in your browser. Supports basic arithmetic (+, −, ×, ÷), trigonometric functions (sin, cos, tan and inverses), logarithms (log, ln), exponents and roots (x², x³, √, ∛), constants (π, e), factorials (n!), and memory functions (M+, M−, MR, MC). Full keyboard support for fast input. Works offline once loaded — no internet needed for calculations.
Common questions
Does the calculator use degrees or radians?
The calculator defaults to degrees mode (DEG) but includes a toggle to switch between degrees and radians (RAD) for trigonometric calculations. Make sure to select the correct mode for your needs.
Can I use keyboard shortcuts?
Yes. All number keys, operators (+, -, *, /), Enter for equals, Backspace for delete, and Escape for clear are supported. Press 'p' for π and 'e' for Euler's number.