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.