Scientific Calculator

A full scientific calculator that works in your browser - basic arithmetic plus trigonometry, logarithms, powers, and roots. Angles are in degrees.

Scientific Calculator

Live

How to use it

This works like a standard handheld scientific calculator: enter a number, press an operator or function, enter the next number, and press "=" for the result. Trigonometric functions (sin, cos, tan) work in degrees.

Example

To calculate sin(30°): press 3, 0, then sin. Result: 0.5. To calculate 5 x^y 2 (5 squared): press 5, x^y, 2, =. Result: 25.

Step-by-step guide

Enter a number using the number keys.
Press a function key (sin, cos, log, sqrt, etc.) to apply it immediately to the current number, or an operator (+, -, x, /) to start a two-number calculation.
Press "=" to complete a two-number calculation, or "C" to clear and start over.

Common mistakes

Expecting radians instead of degrees for trig functions - this calculator uses degrees, the more common default for everyday use.

Taking the log or square root of a negative number or zero where undefined - the display will show "Error" in that case.

Frequently asked questions

Does this follow order of operations (PEMDAS)?

It works like a basic handheld calculator, evaluating left to right as you press keys, rather than parsing a full typed expression with operator precedence. For a single calculation with one operator, this gives the same result either way.

What does "log" vs "ln" mean?

"log" is the base-10 logarithm, and "ln" is the natural logarithm (base e). They're different functions that happen to look similar.

Can I switch to radians?

This version uses degrees only. To convert manually, multiply a degree value by pi/180 to get radians before using it elsewhere.

Related calculators

See the full list of Math calculators, or try: