Scientific Calculator

Free scientific calculator online (no sign-up)

This page gives you a free scientific calculator online inspired by Desmos-style compact keys. It runs entirely in the browser, uses mathjs for safe evaluations (no raw eval), and supports trig, logs, exponentials, factorial, powers, memory, and degree/radian modes. No registration, no ads, and no tracking—just fast calculations for students, engineers, analysts, and anyone who needs more than a basic calculator.

Key features at a glance

• Angle modes: DEG/RAD toggle for trig with correct conversions.
• Memory: M+, M-, MR, MC plus mem variable in expressions.
• Ans recall: Reuse last result with the Ans button or ans variable.
• Scientific stack: sin, cos, tan, asin, acos, atan, ln, log, exp, sqrt, factorial, powers.
• Safe math: mathjs-backed parser instead of plain JavaScript eval.
• History: Recent calculations kept for quick reuse.

How to use this calculator

1. Pick angle mode (DEG or RAD) before trig operations.
2. Tap functions; parentheses auto-insert for sin(), cos(), ln(), log(), etc.
3. Use Ans to pull the last result and mem to reference stored memory.
4. Press Enter or = to evaluate; AC clears everything.
5. For powers, use ^ (e.g., 2^3), and for factorial use x!.

Long-tail needs we cover

Whether you need a free online scientific calculator with DEG/RAD, a quick math calculator with factorial and logs, or a scientific calculator for homework, this tool stays fast and privacy-friendly. It is browser-based, so it works on Windows, macOS, Linux, and Chromebooks without installs.

Accuracy and formatting

Results are formatted to 12 significant digits to balance readability and precision. For very large or small numbers, mathjs handles scientific notation gracefully. Factorials are fine for moderate integers; extremely large factorials grow quickly and may overflow practical ranges.

Tips for reliable results

• Set angle mode correctly before trig (DEG for degrees, RAD for radians).
• Use parentheses to control order: e.g., sin(30+15) vs sin(30)+15.
• For logs, log() is base 10 and ln() is natural log.
• Use exp() for e^x and ^ for arbitrary powers.
• Memory: store running totals with M+ / M-, recall with MR, clear with MC.

Frequently asked questions

Is this calculator free?

Yes, it is a free online scientific calculator with no sign-up or ads.

Does it support degrees and radians?

Yes. Toggle DEG/RAD; trig functions adapt automatically.

Can I use memory?

Yes. M+, M-, MR, MC are available, and you can reference mem inside expressions.

How do I get the last answer?

Use Ans or type ans in an expression.

Is it safe compared to using eval?

We rely on mathjs for parsing and evaluation instead of raw eval, making it safer and more predictable.

Does it show steps?

No step-by-step breakdown, but it is fast for direct answers. For steps, use a CAS. This tool is for quick, accurate evaluations.

Will it work on mobile?

Yes. The responsive layout keeps keys reachable on phones and tablets.

Any limits?

Standard floating-point limits apply; extremely huge factorials or powers may overflow.

Quick checklist

• Pick DEG/RAD before trig.
• Use parentheses to control order.
• Recall Ans and mem to speed repeated work.
• Use log for base-10, ln for natural log, exp for e^x.
• For clean reuse, clear with AC and start fresh.