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Scientific Calculator

Free online scientific calculator with trigonometry, logarithms, exponents, and more. Fast, accurate, and works on any device.

100% Free No Signup Keyboard Support
Mode: DEG
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Features of Our Scientific Calculator

Trigonometric Functions

Complete set of trig functions: sin, cos, tan and their inverses. Toggle between degrees and radians.

Logarithms & Exponents

Calculate log (base 10), natural log (ln), exponents (x^y), square roots, and cube roots instantly.

Calculation History

Every calculation is saved. Click any history item to reuse the result. Clear history anytime.

Keyboard Support

Type directly using your keyboard. Numbers, operators, parentheses, and Enter to calculate.

Mobile Friendly

Works perfectly on phones, tablets, and desktops. Responsive design adapts to any screen size.

Mathematical Constants

Built-in constants: π (pi) and e (Euler's number). Use them directly in any calculation.

How to Use the Scientific Calculator

Our free online scientific calculator provides all the functions you need for mathematics, engineering, physics, and everyday calculations. Here's how to get the most out of it:

Basic Operations

Use the number pad (0-9) and basic operators (+, −, ×, ) for standard arithmetic. Press the green = button or hit Enter on your keyboard to calculate.

Trigonometric Functions

Access sin, cos, tan and their inverse functions (sin⁻¹, cos⁻¹, tan⁻¹) from the top rows. Toggle between DEG (degrees) and RAD (radians) mode using the switch at the top of the calculator. For example:

  • sin(30) in DEG mode = 0.5
  • cos(60) in DEG mode = 0.5
  • tan(45) in DEG mode = 1

Logarithms and Roots

  • log(x) — Base-10 logarithm
  • ln(x) — Natural logarithm (base e)
  • √x — Square root (sqrt)
  • ∛x — Cube root (cbrt)
  • x^y — Exponentiation (use the ^ symbol)

Factorials and Constants

Calculate factorials using the n! button (e.g., 5! = 120). Insert mathematical constants π (≈ 3.14159) and e (≈ 2.71828) with a single click.

Parentheses and Order of Operations

The calculator follows standard mathematical order of operations (PEMDAS/BODMAS). Use parentheses ( ) to control calculation order. Example: 2 * (3 + 4) = 14, not 10.

Keyboard Shortcuts

  • 0-9 — Number input
  • + - * / — Operators
  • ^ — Exponent
  • ( ) — Parentheses
  • Enter — Calculate
  • Backspace — Delete last character
  • Escape — Clear all

Frequently Asked Questions

Is this scientific calculator free to use?

Yes, 100% free with no limits, no signup required, and no hidden fees. Use it as many times as you need for school, work, or personal projects.

What's the difference between DEG and RAD mode?

DEG (degrees) mode treats angles in degrees (360° = full circle). RAD (radians) mode treats angles in radians (2π = full circle). Use DEG for basic geometry and RAD for calculus and advanced math.

Can I use this calculator on my phone?

Absolutely! The calculator is fully responsive and works on all devices — iPhone, Android, tablets, and desktop computers. The buttons resize automatically for easy tapping on mobile.

Does it save my calculation history?

Yes, your calculation history is saved in your browser's local storage. You can click any previous calculation to reuse it, or clear the history anytime with the Clear button.

How do I calculate square root or cube root?

Use the √ button for square root (e.g., 16 = 4) or the ∛ button for cube root (e.g., ∛27 = 3). You can also type sqrt(16) or cbrt(27) directly.

Can I calculate factorials?

Yes! Use the n! button. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. Factorials work for non-negative integers.

Is my data private?

Yes. All calculations happen directly in your browser. We don't store or transmit your calculations to any server. Your data stays on your device.

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The most powerful free scientific calculator on the web. No downloads, no signup, just math.

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