OPERAVA · Math tools
A scientific calculator that stays simple.
Work through arithmetic, powers, roots, logarithms and trigonometry with a keyboard-friendly calculator.
Supported: sin, cos, tan, sqrt, ln, log, abs, ^, !, π
Example: 2^3 + log(100). Use parentheses for functions.
Accuracy note: The calculator uses floating-point arithmetic with rounded displayed results. Do not rely on this tool for regulated engineering, medical, financial, or safety-critical calculations without independent verification.
Recent calculations in this tab
Memory & calculation history
Memory: 0
Memory and recent calculation history stay in this tab and are cleared when it closes.
How calculations work
Expressions are parsed as mathematical operations, not executed as JavaScript. Trigonometric functions use your selected degree or radian mode. Large factorials and non-finite results are rejected.
Frequently asked questions
Does the calculator use eval?
No. It uses a restricted mathematical expression parser.
How do I calculate a power?
Use the ^ symbol, for example 2^8.