Scientific Calculator

Full scientific calculator with trig, log, powers, memory, and keyboard support

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How to Use Scientific Calculator

Enter expression

Click buttons or use your keyboard to type numbers and operations. The display shows your expression and live result.

Use scientific functions

Access sin, cos, tan, ln, log, square root, powers, factorial, and constants (π, e). Toggle between degrees and radians.

View and reuse results

Press equals to evaluate. Results are saved to history — click any entry to reuse it. Use memory (M+, M−, MR, MC) for complex calculations.

Why Choose AllTools Scientific Calculator?

  • ✓ 100% free, no account needed
  • ✓ No data stored or transmitted
  • ✓ Trigonometric functions (sin, cos, tan + inverses)
  • ✓ Logarithms (ln, log₁₀, log₂)
  • ✓ Powers and roots (x², x³, xʸ, √, ∛, eˣ, 10ˣ)
  • ✓ Factorial, percentage, reciprocal
  • ✓ Constants: π and e
  • ✓ Memory operations (M+, M−, MR, MC)
  • ✓ Full keyboard support
  • ✓ Calculation history with click-to-reuse

Frequently Asked Questions

Is this scientific calculator free? ▼
Yes, completely free. No account, no subscription, no ads interfering with the calculator.
Does it support trigonometric functions? ▼
Yes. sin, cos, tan, and their inverses (arcsin, arccos, arctan). You can toggle between degrees and radians.
Can I use my keyboard? ▼
Yes. Number keys, +, -, *, /, Enter (equals), Escape (clear), Backspace, ^, (, ) all work.
How does memory work? ▼
M+ adds the current value to memory, M− subtracts, MR recalls the stored value, MC clears memory. An "M" indicator shows when memory is active.
Does it follow order of operations? ▼
Yes. The calculator uses proper mathematical precedence: parentheses first, then exponents, multiplication/division, addition/subtraction.
Can I calculate factorials? ▼
Yes. Enter a number and click n! to calculate its factorial. Supports values up to 170!.
Is my data stored? ▼
No. All calculations happen in your browser. History is session-only and clears when you leave the page.
What is the difference between DEG and RAD? ▼
DEG mode interprets trig function inputs as degrees (360° circle). RAD mode uses radians (2π circle). Most everyday calculations use degrees.
Does this work on mobile? ▼
Yes. The calculator grid is responsive and works well on phone screens.

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