Scientific Calculator
Trig, logarithms, powers, roots, constants and parentheses — a real scientific calculator in your browser.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Click or type
Use the keypad or your keyboard — numbers and operators work both ways.
Build your expression
Use parentheses and functions like sin, log and √ as needed.
Press = or Enter
Read the result, then copy it with one click if you need it elsewhere.
What Is a Scientific Calculator?
A scientific calculator handles the operations beyond basic arithmetic that engineers, students and analysts use every day: trigonometric functions, logarithms, powers and roots, constants such as π and e, and parentheses for grouping.
This version runs entirely in JavaScript. Trig functions follow the standard convention of using degrees by default, with a degree/radian toggle for advanced work. Results are shown to a generous 10 significant digits.
How to Use It
- Type with your keyboard or click the on-screen keys — the layout mirrors a physical scientific calculator.
- Use parentheses for grouped expressions such as (2 + 3) × 4, and the x², √ and x^y keys for powers and roots.
- sin, cos and tan operate in degrees by default; switch to radians with the DEG/RAD toggle.
Accuracy Notes
All operations use standard IEEE floating-point arithmetic. Values such as cos(90°) in degrees are computed as exactly zero by the internal conversion. If a result is outside the representable range you will see an error message instead of a misleading number.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
Does this scientific calculator work in degrees or radians?
Degrees by default, which matches how most school and everyday problems are expressed. Use the DEG/RAD toggle to switch to radians for calculus and physics work.
How do I calculate a square root?
Type the number, then press the √ key, or type sqrt( followed by the number and ).
Can I use parentheses?
Yes. Build expressions like (12 + 8) × (15 − 3) using the ( and ) keys.
Where is the power key?
Use the x^y key (or the ^ key on your keyboard) to raise a number to any power, and x² for squares.
Is there a memory function?
Yes — MS stores the current value, MR recalls it, M+ adds to it, and MC clears it.