Does this calculator use degrees or radians?

You choose — use the DEG/RAD toggle above the keypad to switch modes. The toggle affects sin, cos, tan, and their inverse functions (asin, acos, atan). It's set to degrees by default.

How do I calculate a factorial?

Enter a non-negative whole number, then press the x! button. Factorials are only defined for non-negative integers, so decimal or negative inputs will show an error.

Can I use my keyboard instead of clicking buttons?

Yes. Number keys, +, -, *, /, Enter (equals), Backspace, and Escape (clear) all work directly from your keyboard.

What do the memory buttons (M+, M-, MR, MC) do?

M+ adds the displayed value to memory, M- subtracts it, MR recalls the stored memory value to the display, and MC clears memory back to zero. Memory persists across multiple calculations until you clear it or close the page.

Why does dividing by zero show 'Infinity'?

Dividing any nonzero number by zero is mathematically undefined but is represented as Infinity. Dividing zero by zero shows an error, since that result is truly indeterminate.

How many past calculations does the history panel keep?

The history panel shows your 10 most recent calculations. It resets when you reload the page — nothing is saved or sent to a server.

Can I calculate powers and roots?

Yes. Use xʸ for any power (base xʸ exponent), x² for squaring, and √ for square roots. For higher roots, use xʸ with a fractional exponent like 0.333 for a cube root.

Is this calculator accurate for very large or very small numbers?

Results are shown to 12 significant digits. Extremely large factorials (above 170!) or numbers beyond standard floating-point range will display as Infinity rather than an exact value.

Scientific Calculator — Trigonometry, Logarithms, and More

Our Scientific Calculator handles everything from basic arithmetic to trigonometry, logarithms, exponents, and factorials — right in your browser. Toggle between degree and radian mode for trig functions, use memory keys (M+, M-, MR, MC) to store intermediate results, and review your last ten calculations in the history panel. Full keyboard support means you can type expressions just as fast as clicking buttons.

Quick Answer

A scientific calculator extends a basic calculator with trigonometric (sin, cos, tan), logarithmic (log, ln), exponential (xʸ, x²), and factorial functions. This free online version also supports degree/radian switching, memory storage, and a running calculation history — no download or signup required.

You can also type using your keyboard: numbers, + - * /, Enter for equals, Backspace, and Escape to clear.

History

No calculations yet.

How to Use the Scientific Calculator — Free Online Calculator

1
Click number and operator buttons, or type directly on your keyboard, to build your calculation.
2
Use the DEG/RAD toggle to switch angle modes before using sin, cos, tan, or their inverse functions.
3
Click a scientific function button (√, x², log, ln, x!, etc.) to apply it to the current display value.
4
Press '=' or Enter to see the result — it's automatically added to the history panel below the keypad.
5
Use M+, M-, MR, and MC to store, recall, and clear a value in memory across multiple calculations.

Why Use Scientific Calculator — Free Online Calculator?

Switching between a phone calculator app, a spreadsheet, and a search engine just to run a trig function or a factorial wastes time. Our Scientific Calculator keeps every function you need — arithmetic, trigonometry, logarithms, powers, roots, and factorials — in one keyboard-friendly interface. The degree/radian toggle prevents the single most common scientific-calculator mistake (computing sin(30) in the wrong angle mode), and the history panel means you never lose track of an intermediate result mid-calculation.

Frequently Asked Questions

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