Scientific Calculator
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Free Online Scientific Calculator
Our scientific calculator provides all the functions you would find on a physical Casio or Texas Instruments scientific calculator — right in your browser. It supports trigonometric functions in both degree and radian modes, logarithms, powers, roots, factorials, absolute values and the mathematical constants π and e.
The calculator supports keyboard input so you can type expressions directly without clicking buttons. A calculation history panel lets you review and recall previous results.
Scientific Calculator Functions Reference
| Button | Function | Example |
|---|---|---|
| sin / cos / tan | Trigonometric functions | sin(30°) = 0.5 |
| INV + sin/cos/tan | Inverse trig (arcsin, arccos, arctan) | sin⁻¹(0.5) = 30° |
| log | Logarithm base 10 | log(100) = 2 |
| ln | Natural logarithm (base e) | ln(e) = 1 |
| √x | Square root | √(144) = 12 |
| xʸ | Power (x to the power y) | 2^10 = 1024 |
| x² | Square of x | 9² = 81 |
| n! | Factorial | 5! = 120 |
| |x| | Absolute value | |−7| = 7 |
| π | Pi constant | ≈ 3.14159265 |
| e | Euler's number | ≈ 2.71828182 |
Frequently Asked Questions
How do I use DEG and RAD mode?
DEG mode is for angles in degrees (0°–360°). RAD mode is for angles in radians (0–2π). Click DEG/RAD to switch. For everyday trigonometry, use DEG mode. For calculus and advanced math, use RAD mode.
How do I calculate inverse sin (arcsin) online?
Press INV to toggle inverse mode, then press sin. The button label changes to sin⁻¹. Enter your value and press = to get the arcsin result in degrees or radians.
Can I use keyboard shortcuts?
Yes. Type numbers and operators directly on your keyboard. Press Enter for equals, Backspace to delete, Escape to clear. The calculator responds to all standard number and operator keys.
Is this scientific calculator free?
Yes, 100% free. No account, no ads, no download. Works entirely in your browser.