Free Scientific Calculator
A full calculator with trig, logs and powers.
What is the Scientific Calculator?
The calculator app is never open when you need it, and the one on your phone hides its scientific functions behind a rotate. When you're mid-problem — a bit of trig, a logarithm, a power — you just want the full keypad right there in the browser.
This scientific calculator gives you arithmetic plus powers, roots, trigonometry, logarithms and factorials, with degrees or radians and full keyboard support.
Last updated: Aug 13, 2026
What does this tool do?
You build an expression with the on-screen keys or your keyboard, and the calculator evaluates it with correct operator precedence and parentheses.
Beyond the basics it handles powers and roots, sin/cos/tan and their inverses, log and ln, factorials, percentages and the constants π and e — switching trig between degrees and radians.
Key features
Full function set
Trig, logs, powers, roots, factorials.
Degrees or radians
Toggle for the trig functions.
Correct precedence
Parentheses and order of operations.
Keyboard support
Type it, Enter to evaluate.
Constants
π and e built in.
Example
Common use cases
- Students — Work through homework and exam prep.
- Engineers — Quick trig and log calculations.
- Teachers — Demonstrate calculations in class.
- Scientists — Run everyday computations.
- Developers — Sanity-check numeric formulas.
- DIYers — Compute measurements and angles.
- Finance folks — Powers for growth and interest.
- Anyone without a calculator — A full keypad in the browser.
Benefits
- It's a full scientific keypad, always one tab away.
- It respects order of operations and parentheses.
- It switches cleanly between degrees and radians.
- You can type expressions instead of clicking.
Tips
- Use parentheses to control the order of operations.
- Switch to radians for calculus; degrees for geometry.
- The ^ key raises to a power; x² is a shortcut for ^2.
- Press Enter to evaluate and Escape to clear.
- Chain calculations — the result carries into the next.
- π and e are exact constants, not rounded.
- Factorial (!) works on non-negative whole numbers.
- Check degree/radian mode before trusting a trig result.
Common mistakes to avoid
Wrong angle mode
Fix: Confirm degrees vs radians before using sin, cos or tan.
Missing parentheses
Fix: Wrap groups so precedence matches your intent, e.g. (1+2)*3.
Confusing log and ln
Fix: log is base-10; ln is the natural log (base e).
Factorial of a decimal
Fix: Factorial only applies to non-negative integers.
How it works
- 1
Enter an expression
Tap buttons or type it.
- 2
Pick degrees or radians
For the trig functions.
- 3
Evaluate
Press = or Enter for the result.
Frequently asked questions
Arithmetic, powers and roots, sin/cos/tan and their inverses, log and ln, factorials, percentages and the constants π and e.
Yes. Type numbers and operators directly, press Enter to evaluate and Escape to clear.
Arithmetic, powers and roots, sin/cos/tan and inverses, log and ln, factorials, percentages, and the constants π and e.
Yes. Type numbers and operators directly, press Enter to evaluate and Escape to clear.
Both. Use the DEG/RAD toggle to control how trig functions interpret angles.
log is base-10 logarithm; ln is the natural logarithm (base e).
No. Everything is evaluated locally in your browser.
Yes — it follows standard precedence and supports parentheses for grouping.
Conclusion
A scientific calculator puts a full keypad — trig, logs, powers and more — one tab away, with keyboard speed. Pair it with the percentage and fraction calculators for everyday math.