A free online scientific calculator supporting basic arithmetic, trigonometric functions (sin, cos, tan), logarithms, square roots, cube roots, exponents, fractions, and more — with full calculation history.
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Type numbers and operators with your keyboard or click the buttons. Press Enter to calculate, Backspace to delete the last character and use the arrow keys up and down to bring back earlier calculations from the history panel. Every result is saved to the history, so you can check your steps or reuse a number later.
The function buttons work on the number on the display: sine, cosine and tangent (in radians), the natural logarithm, the exponential function, square and cube, square root and cube root. For powers with any exponent and for fractions, a small dialog opens where you enter the exponent or the numerator and denominator.
The calculator runs entirely in your browser, so there is nothing to install and no account to create. It works on desktop, tablet and phone and is free to use for homework, work or quick everyday sums.