Free Scientific Calculator
A full scientific calculator in your browser: sine, cosine, tangent, logarithms, powers, square roots, π and e — with keyboard support and a history of your calculations.
How to Use the Scientific Calculator
- Click keys or type with your keyboard.
- Use sin, cos, tan, log, ln, √, xʸ, π and e.
- Press = or Enter. Angles are in degrees.
Features
Evaluates complete expressions with proper precedence, converts trig inputs from degrees, and supports ^ powers, parentheses and percentages alongside the basics.
Benefits & Use Cases
Students tackle homework and exams, engineers do quick checks, and anyone who outgrew a four-function calculator gets pro features free.
Tips
Trig uses degrees here — for radians, multiply by π/180 first. Build complex expressions with parentheses rather than doing steps mentally.
Frequently Asked Questions
Are trig functions in degrees or radians?
Degrees — sin(30) = 0.5. Convert radians manually with × π/180.
What does the ^ key do?
Exponentiation: 2^8 = 256. Use parentheses for compound exponents.
What is the difference from the basic calculator?
Adds sin/cos/tan, log/ln, square root, powers, π and e with full expression entry.
Does it work offline?
Yes — once loaded, everything runs locally in your browser.
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