What is Scientific Calculator?
A full scientific calculator in your browser. Type an expression like sin(30) + 2^5 or tap the keypad — you get a live result as you type, degree and radian modes, and a history of recent calculations you can click to reuse.
How to use Scientific Calculator
- Type an expression, or tap the keypad buttons to build one.
- Switch between Degrees and Radians for trigonometry.
- Press = or Enter to save the result to your history.
- Click any history entry to load that expression back into the calculator.
Why use this tool?
Type whole expressions
Enter sin(30) + 2^5 in one go instead of pressing keys in sequence, which makes long calculations far easier to check and correct.
Correct operator precedence
Brackets, powers and unary minus follow standard mathematical convention, so -2^2 correctly gives -4 rather than 4.
Safe by design
Expressions are parsed into tokens rather than executed as code, so nothing typed into the box can run as a script.
Frequently asked questions
Which functions are supported?
sin, cos, tan, asin, acos, atan, ln, log (base 10), sqrt, abs and exp, along with π and e, powers (^), factorial (!), modulo (%) and brackets.
How do I switch between degrees and radians?
Use the Degrees/Radians toggle above the keypad. It affects trigonometric functions in both directions — sin(30) gives 0.5 in degree mode.
Is this tool really free?
Yes, completely free with no limits, no watermarks, no account and no trial period. Because everything runs on your own device, there are no server costs to pass on to you.