SideCalc — Side Panel Calculator

Side panel calculator with history tape, memory keys, keyboard input, parentheses & percent. Free, private, always one click away.

SideCalc — Side Panel Calculator — User Guide Version 1.9 · by Trieu Ngo Overview SideCalc is a calculator that lives in your browser's side panel — the tall strip docked beside your page and kept open while you browse. That full height lets it be more than a keypad: a scrolling history tape, classic memory keys, and a tidy settings popup. It sits right next to whatever you're reading, so you can do the math without leaving the page or switching to a separate app. Click the toolbar icon to open or close it. Key Features * Full-height side panel: built for the panel's tall, narrow space — every bit of height is used, not squeezed into a floating box. * History tape: every result is saved to a scrollable list, newest at the bottom. Click any entry to reuse it; clear it any time with the trash icon. * Memory keys: MC (clear), MR (recall), M+ (add), M− (subtract), MS (store). MC and MR stay disabled until a value is stored, so you always know when memory is in use. * Real math engine: +, −, ×, ÷, decimals, negative numbers, parentheses ( ), percent (%), sign toggle (±) and square root (√). It never uses eval(), so expressions are parsed safely. * One-click copy: click the large result to copy it as a plain number (no separators), ready to paste anywhere. * Readable numbers: thousands separators follow your locale automatically (e.g. 1,000,000.5 in the US, 1.000.000,5 in Vietnam); you can turn grouping off in Settings. * Keyboard status badge: turns green when the panel is focused (keystrokes reach the calculator) and grey when they go to the web page. * Automatic dark mode: the Auto theme follows your system's light/dark setting; you can also force Light or Dark. * Full keyboard support: type with your main keyboard or numpad — NumLock on or off. The Layout, top to bottom * Keyboard badge (top-left) — shows whether the panel is currently receiving keystrokes. * Settings & Clear-history icons (top-right) — the gear opens Settings; the trash clears the history tape. * History tape — the scrollable list of past calculations; click a line to reuse it. * Display — a small line shows the expression you evaluated, and the large line shows the current value. Click the large value to copy it. * Memory row — MC / MR / M+ / M− / MS. * Keypad — digits, operators, parentheses, %, ±, √, backspace, clear and equals. Settings Open the gear icon (top-right) for a popup with: * Appearance — Auto (follows your system), Light, or Dark, chosen from a segmented control. * Decimal places — Auto, or a fixed number of decimals from 0 to 10. * Thousands separator — turn locale grouping on or off. * Shortcut to open — shows the keyboard shortcut that opens SideCalc (none until you set one). "Change…" opens Chrome's own shortcuts page to assign or rebind it. Your history and settings are saved locally on this device and restored next time. Keyboard * Numbers & operators: 0–9, + − * /, the decimal point (.), and parentheses ( ) — from the main keyboard or the numpad (NumLock on or off). * Enter or = : calculate the result. * Backspace : delete the last character. * Delete or Esc : clear everything (Esc also closes the Settings popup). * % : percent. * Open SideCalc: set your own shortcut in Settings → Shortcut to open (Chrome assigns no default). Note: the shortcut opens the panel; because Chrome doesn't let extensions grab keyboard focus, you may still need to click the panel once before typing if it was already open. How to Use * Open / Close: click the extension icon in your browser toolbar to show or hide the panel. It stays docked as you move between pages and tabs. * Calculate: enter an expression with the on-screen keypad or your keyboard, then press = or Enter. * Reuse a result: click any line in the history tape to bring that number back. * Copy a result: click the large result display. * Adjust behavior: open Settings from the gear icon. Permissions & Why They're Needed This extension requests only the minimum required to work, and it never reads, collects, or transmits the content of the pages you visit. It requests no access to websites at all. * sidePanel — lets the extension show its calculator in the browser's side panel. * storage — remembers your history tape, memory value, and settings between sessions, so they are restored when you reopen the panel. Easy to use — Fast — Always docked beside your work. Need Help? If you need support, please contact the extension developer.