🧮 Free Calculator
Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, and advanced functions. Works on mobile and desktop.
✓ No signup ✓ Works offline ✓ Mobile-friendly
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How this calculator works
Expressions are evaluated with math.js, which applies correct order of operations (PEMDAS/BODMAS), supports parentheses, powers (^), and standard functions. Choose Deg or Rad for sine, cosine, tangent, and their inverses.
log is base 10; ln is the natural logarithm. n! inserts a factorial (e.g. 5!). Use MC / MR / M+ / M− for memory after you have a valid result (evaluate with = or use memory keys which evaluate the current line when needed).