Calculator

Calculator with live results, scientific functions, unit converter and history. Select numbers on any page to calculate them.

Calculator: a fast, beautiful calculator in your toolbar — and right on any web page Open it with one click or a keyboard shortcut, type an expression and see the answer as you type. Need numbers from a website? Select them, right-click and choose “Calculate” — the result appears in a small floating window on the same page. ⚡ ANSWERS AS YOU TYPE • The result updates live while you type — no need to press “=” • Type with the keyboard or click the keys, edit anywhere in the expression • Correct order of operations and parentheses: 2 + 2 × 2 = 6 • Smart percent, like a real calculator: 200 + 10% = 220, 200 − 10% = 180 • No floating-point noise: 0.1 + 0.2 = 0.3 🖱️ SELECT & CALCULATE ON ANY PAGE • Highlight an expression on a website, right-click → “Calculate” • Understands real-world text: “1 234,5 × 2 − 10 €”, “$15 + $5”, “1,000,000 / 4” • A floating calculator you can drag anywhere on the page • Alt+Shift+K opens it on the page, Alt+Shift+C opens the toolbar popup 🧮 SCIENTIFIC MODE • sin, cos, tan and their inverses — in degrees or radians • Logarithms (log, ln), square roots, powers, factorials, absolute value • Constants π and e, and ANS for the previous answer • Implicit multiplication: 2π, 3(4 + 1) 📏 UNIT CONVERTER • Length, mass, temperature, area, volume, speed, data and time • The value field accepts expressions, e.g. 12 × 3.5 • Swap units in one click, copy the result with a click 🕘 HISTORY & COPY • Every calculation is saved — click any entry to use it again • Click the result to copy it to the clipboard 🎨 DESIGNED TO BE PLEASANT • Clean modern interface with dark, light and system themes • Basic, scientific and converter modes in tabs • Full keyboard support: Enter — calculate, Esc — clear, Backspace — erase 🔒 PRIVACY The calculator works entirely inside your browser. It does not collect any data, does not send anything anywhere, has no ads and needs no account. History and settings are stored only on your device. The extension touches a web page only when you open the calculator on it yourself.