Calculation Scratchpad

The scratchpad evaluates one formula per line and shows each result instantly on the right.

1. Type a formula on any line, such as 1 + 2 * 3, and the result appears immediately. Press Enter to insert a new line below.
2. Use ans to reference the most recent valid result above the current line, and _1, _2… to reference the results of lines 1, 2 and so on. Invalid lines count as 0.
3. Click Formula Examples to open the example panel; clicking an example inserts it into the current empty line or creates a new line.
4. Switch pads with the tabs at the top. Double-click a tab or click ✎ to rename it, click + to add a pad, and click × to delete one (at least one pad is kept).
5. Click Load Sample Data to create a pad containing compound-interest, function and row-reference examples.
6. Pads are saved automatically in browser localStorage and survive a page refresh. Click Clear or press Ctrl/⌘+L to clear the current pad.

• Supports + - * / % ^, parentheses and unary signs, plus ** for exponentiation and implicit multiplication such as 2(3+4) or 2pi.
• Functions include sin, cos, tan, asin, acos, atan, atan2, sinh, cosh, tanh, asinh, acosh, atanh, ln, log, log10, log2, exp, sqrt, cbrt, abs, pow, min, max, hypot, floor, ceil, round, trunc and sign.
• Constants include pi, π, tau and e. log is base 10, ln is natural log, and trigonometric functions use radians.
• round(x, n) rounds to a specified number of decimal places, limited to 0–12.
• Multiple scratchpads are supported, with renameable and deletable tabs. Ten font sizes from XS to 6XL are available and remembered separately.
• Integer results use thousands separators, decimals show up to 12 significant digits, and longer values switch to scientific notation.
• Keyboard shortcuts: Enter for a new line, Ctrl/⌘+D to delete a line, ↑/↓ to move, and Backspace on an empty line to remove it.
• Formulas run through a custom parser rather than eval or new Function.