Scientific Calculator
Trig, logs, exponents in one place
History
Quick guide
What can Scientific Calculator help you do?
Free online scientific calculator: sin/cos/tan, log/ln, sqrt, π, e, memory (M+/M-/MR), and history.
Best for
Use sin, cos, tan, log, ln, roots, powers, π, and e for coursework or routine checks. It includes DEG/RAD, MC/MR/M+/M-, and 10 history entries.
How to use it
Enter an expression with keys and parentheses; x^y is power. Check DEG or RAD before trig. M+ and M- adjust memory, MR recalls it, and MC clears it.
How to read the result
Equals adds the expression to history. Floating point makes 0.1 + 0.2 only near 0.3; 12 significant digits are shown.
Privacy and limits
Expressions, memory, and 10 history items stay in the browser, not uploaded or sent. Use samples for confidential work.
Not for engineering, statistics, or high-precision work. Wrong DEG/RAD mode changes trig results.
Frequently Asked Questions
How is operator order decided?
Standard PEMDAS: Parentheses → Exponents → Multiply/Divide → Add/Subtract. 2+3*4 = 14.
DEG vs RAD?
Degrees vs Radians for trig functions. Default is DEG.