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Free Scientific Calculator

A full calculator: basic operations, trigonometric functions (sin, cos, tan and their inverses), logarithms, roots and powers, factorial, and the constants π and e — with a degrees or radians switch.

Free · No sign-up · Works on your phone

Trigonometric functions use degrees. Use parentheses to control the order of operations.

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How to use it

  1. 1

    Type the expression with the buttons or your keyboard.

  2. 2

    Pick degrees or radians for trigonometric functions.

  3. 3

    Press = to see the result, then copy it.

FAQ

Which functions are supported?

Basic operations, powers, square and cube roots, sin/cos/tan and their inverses, natural and base-10 logarithms, factorial, percentage, and the constants π and e.

Degrees vs radians?

Degrees are the everyday angle unit (360° in a circle); radians are the mathematical unit (2π in a circle). Choose the right one before using trigonometric functions.

Can I use my keyboard?

Yes — digits, operators, Enter to evaluate and Backspace to delete all work directly.

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