Calculator

Calculator is a free, modern calculator that runs entirely in your browser on phone, tablet, and desktop. Start with a clean, big-key basic keypad, and reveal a complete scientific keyboard the moment you need it. No accounts, no ads, no downloads.

A full scientific keypad
Trigonometry with DEG / RAD / GRAD modes, logarithms and exponentials, powers and roots, factorials, permutations and combinations, modulo, absolute value, rounding, random numbers, and the constants π and e. An INV shift flips ten keys to their inverses — sin⁻¹, eˣ, 10ˣ, ∛, nth root and more — and a hyp toggle adds the hyperbolic family, just like a physical calculator's 2nd key.

Interactive graphing
Plot y = f(x) and explore it with pan and zoom. Type expressions naturally — `sin(x) + x^2/4`, implicit multiplication like `2x`, every keypad function supported. Domain errors and asymptotes draw as honest gaps, and the graph follows your theme.

History, wherever you are
Every calculation is saved to a history you can recall with a tap. Sign in with a free Puter account to sync your history across all your devices — or don't, and it simply stays on this one.

Thoughtful details everywhere
- Memory keys (MC, MR, M+, M−, MS) that survive clearing and persist between visits
- Thousands separators as you type, and floating-point-safe results (0.1 + 0.2 is 0.3 here)
- Scientific-notation entry with the EXP key (6.022 EXP 23 → 6.022e23)
- Parentheses with implicit multiplication, and a live expression line above the display
- Tap the display to copy a result; friendly, recoverable error messages
- Light and dark themes that follow your system preference, with a manual toggle
- Fully keyboard-operable on desktop, with haptic feedback on touch devices

Works offline, like a native app
Add Calculator to your home screen and it launches full-screen and keeps working with no connection at all.

Built by Puter. Free forever.