How to use this calculator
Type numbers and operators the same way you would on a physical scientific calculator. Trig functions (sin, cos, tan) read the angle mode shown above the keypad — switch between degrees and radians with the toggle. Memory keys (M+, M−, MR, MC) hold one value across calculations, shown by the marker in the top-left corner when active.
Function reference
| Key | What it does |
|---|---|
| sin, cos, tan | Trigonometric functions, in degrees or radians |
| log | Base-10 logarithm |
| ln | Natural logarithm |
| xʸ | Exponentiation (x to the power of y) |
| √ | Square root |
| x! | Factorial |
| π, e | Mathematical constants |
| M+, M−, MR, MC | Add to, subtract from, recall, and clear memory |
Why use an online scientific calculator
A browser-based scientific calculator is useful when you need trig or logarithmic functions quickly without installing an app or hunting for a physical calculator — for homework, lab reports, engineering estimates, or double-checking a spreadsheet formula.