OpenToolkit

Scientific Calculator

Calculators

Perform everyday and scientific calculations with trigonometry, logarithms, roots and powers.

Open Scientific Calculator

How to use

  1. Choose degrees or radians for trigonometric calculations.
  2. Enter an expression using the keypad or your keyboard.
  3. Press equals or Enter to calculate; tap a history result to reuse it.

Features

  • Degree and radian modes
  • sin, cos, tan, logarithms, roots, powers, factorial, π and e
  • Memory controls and reusable calculation history
  • Keyboard-friendly input with local, private calculation
🔒 Private by design — Scientific Calculator runs entirely in your browser. Your files and text never leave your device.