Scientific Calculator
Free online scientific calculator with sin, cos, tan, log, sqrt and more. Free, fast and private.
Your result will appear here.
Formula notes: sin, cos and tan use degrees; log is base 10; ln is the natural log; ^ is power; % is modulo. Type on your keyboard too — digits, + − * / ( ) . and Enter (=) all work.
How to use Scientific Calculator
- Tap the buttons (or type on your keyboard) to build your calculation.
- Use sin, cos, tan, log, ln, √ and ^ for scientific functions — angles are in degrees.
- Press = Equals to see the result; C clears and ⌫ deletes the last character.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
Are sin, cos and tan in degrees or radians?
Degrees. sin(90) gives 1, as most people expect on a handheld scientific calculator.
What is the difference between log and ln?
log is base 10 (log 100 = 2) and ln is the natural logarithm, base e.
Can I use my keyboard?
Yes. Digits, + − * / ( ) . and % work, Enter calculates, Backspace deletes and Escape clears.
Is this scientific calculator free?
Yes, it is 100% free with no sign-up. Your data stays in your browser.