Free Online Scientific Calculator

Basic and scientific calculations in your browser.

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About the Calculator

This free online scientific calculator handles both basic arithmetic and advanced scientific functions. Perform addition, subtraction, multiplication, division, trigonometric functions (sin, cos, tan), logarithms (log, ln), square roots, powers, factorials, and constants like π and e.


All calculations run entirely in your browser with full keyboard support. Your calculation history is preserved so you can review and reuse previous results. No data is sent to any server.

How to Use

  1. Click or Type: Use buttons or your keyboard to enter calculations.
  2. Scientific: Use the top row for trig, log, sqrt, and constants.
  3. Evaluate: Press = or Enter to compute the result.
  4. History: Previous calculations are saved below for reference.

Keyboard Shortcuts

  • 0–9, . — Number input
  • + - * / — Arithmetic operators
  • Enter or = — Evaluate expression
  • Backspace — Delete last character, Escape — Clear all