CalcBoard - Scientific Calculator

Full scientific calculator in your browser sidebar. Trig, log, powers, memory, history, unit converter. Free forever.

CalcBoard is a full-featured scientific calculator that lives in your browser sidebar. Access it instantly with one click or keyboard shortcut (Ctrl+Shift+K / Cmd+Shift+K). ✨ FEATURES Scientific Functions • Trigonometry: sin, cos, tan and inverse functions • Logarithms: log₁₀ and natural log (ln) • Powers: square, cube, custom exponents, square root • Constants: π and e Developer Tools • Base conversion: Decimal, Hexadecimal, Binary • Perfect for programmers working with colors, memory addresses, or bitwise operations Unit Converter • Length: mm, cm, m, inches, feet • Weight: g, kg, lb, oz • Temperature: Celsius, Fahrenheit, Kelvin • Data: B, KB, MB, GB, TB Productivity • Calculation history - never lose your work • Memory functions: MC, MR, M+, M−, MS • Keyboard shortcuts for power users • Clean, dark interface that's easy on the eyes 🔒 PRIVACY • No account required • No data collection • Works completely offline • Your calculations stay on your device Free forever. No ads. No tracking.