Scientific Calculator
Scientific calculator with functions, powers, factorials and history
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How to use
The scientific calculator supports arithmetic, parentheses, percentages, powers, factorials, and trigonometric/logarithmic functions, with a live result preview. Keyboard input is supported: type digits and operators directly, press Enter to calculate, Backspace to delete, and Esc to clear. The history keeps the last 20 entries — click a result to reuse it as the starting point of the next calculation, or press ANS to insert the previous result. log is the common logarithm (base 10) and ln is the natural logarithm.