A fast, powerful scientific calculator, right in your browser. Use it your way: • Popup: click the toolbar icon, or press Alt+S, and the calculator opens instantly. • On every page: an optional small calculator button sits on the side of any website, ready when you need it. Drag it to any side you like. • Its own window: open the calculator in a separate window that stays open while you work. Resize it to any size. Features: × Powerful: full keyboard support, with shortcuts for every button. ÷ Scientific: all the math functions you need, from trigonometry and logarithms to nCr, nPr, mod, gcd and lcm. + Easy to use: see your whole equation as you type it. Fix mistakes with DEL, or click into the equation and use the arrow keys to change a number or operator in the middle. = Fraction mode: tap a/b and every division is drawn as a real fraction while you type, with square roots and brackets. Results like 0.75 show as 3/4. % Statistics: tap the bars on the display, then type or paste a list of numbers, even a column from a spreadsheet. Get count, sum, mean, standard deviation (σ and s), min, median and max. Click a result to use it in your calculation. − History: your last 50 calculations are saved, fractions included. Tap the clock to see them, then insert an equation to use it again, insert a result to use the number, or copy either one. × Number format: choose Fix, Sci or Eng notation with 0 to 9 decimal places, and thousands separators like 1,234,567.89. ÷ Copy and paste: copy a result, or paste a whole equation such as 2 + 3 × sin(30). + Ans key: put your last answer into a new equation, like 5 × Ans. = Real calculator math: 1 + 2 × 3 = 7, with brackets nested up to 29 levels. % Light and super fast: it works offline. Remembers your work, respects your privacy, and costs nothing. Free and open source: github.com/raad-altaie/Scientific-Calculator Cheers!