Calculator

Absolutely! The calculator is fully keyboard-accessible. Type your expressions, use Enter to calculate, Backspace to delete, and arrow keys to move around.

Switch to Scientific Mode. You can use sin(x), cos(x), and tan(x). For example: sin(30) = 0.5 in degrees. You can also toggle to radians using the Deg/Rad button.

Degrees (°) are easier for most humans (like 90° for a right angle), while radians (π) are used more in advanced math. Toggle the mode based on your use case — trig functions adjust accordingly.

Yes! The calculator supports nested expressions like: 3 * (4 + sqrt(9)) - sin(45). Missing parentheses are automatically closed at evaluation.

Yes. It’s 100% free. Your expressions and history stay in your browser only — no accounts or sign-ups needed.

Absolutely. You can paste any valid expression (like 5 + 2 * sin(30)) directly into the calculator. You can also click into the display and edit it live like a notepad.

The calculator auto-closes missing parentheses and gives a helpful error if the math expression is malformed. This helps avoid frustrating blank results.

Yes. The calculator is fully mobile-responsive. Buttons are touch-friendly and you can type with your mobile keyboard if preferred.

Yes! You can use advanced functions like log10(x), ln(x), sqrt(x), pi, e, and x! (factorial). Example: log(100) gives 2; ln(e) gives 1.

Yes. Your recent history is saved locally in your browser and restored when you revisit the site. You can also clear it anytime.

If the page is cached by your browser, it may work offline temporarily. However, it’s designed for online use to ensure fast updates and improvements.