Scientific Calculator
Full scientific calculator with trigonometric, logarithmic functions and history. Supports keyboard input.
A full scientific calculator in your browser
This scientific calculator goes well beyond basic arithmetic, adding trigonometric functions (sine, cosine, tangent), logarithms (base-10 log and natural log), square roots, exponents, factorials, squaring, and the constants pi and e. It is designed for students working through algebra, trigonometry, or physics problems, as well as engineers, scientists, and anyone who needs more than a phone calculator can comfortably offer.
Expressions are evaluated with standard operator precedence, so multiplication and division are handled before addition and subtraction, and you can use parentheses to group terms exactly as you would on paper. A running history panel keeps your last calculations visible so you can refer back to earlier steps in a longer problem.
How to use it
Tap the on-screen buttons to build an expression, then press the equals key to evaluate it. Function buttons such as sin(, cos(, log(, and the square root open a parenthesis for you, so you type the value and close the bracket yourself. The x-squared button wraps the current entry to raise it to the power of two, and the factorial button computes the factorial of the displayed whole number.
You can also type directly with your keyboard: number keys, plus, minus, asterisk for multiply and slash for divide all work, Enter evaluates, Backspace deletes the last character, and Escape clears everything. The AC button resets the display, while the backspace arrow removes one character at a time.
Notes on accuracy and angles
Trigonometric functions interpret their input in radians, which is the standard for most programming and higher-level maths. If you are working in degrees, convert first by multiplying by pi divided by 180. Factorials are only defined for non-negative whole numbers, and very large factorials (above 170) exceed what the calculator can represent and are shown as Infinity.
Results are rounded to twelve significant figures to balance precision with readability. Everything runs locally in your browser with no network connection, so your calculations and history are private and are cleared as soon as you close or refresh the page.