All online calculators

Rectangle area calculation by perimeter

Rectangle area calculation with known perimeter and aspect ratio

Rectangle area calculation by perimeterCreative Commons Attribution/Share-Alike License 3.0 (Unported)

Regular expression tester

This online calculator allows user to experiment with regular expressions.

Regular expressions sandboxCreative Commons Attribution/Share-Alike License 3.0 (Unported)
  • Secant method

    The secant method is a root-finding algorithm that uses a succession of roots of secant lines to better approximate a root of a function f.

  • Second, third and other derivatives

    Evaluates first, second third and other derivatives of a single argument function

  • Sector esférico

    Esta calculadora encuentra el volumen y área de superficie de un sector esférico

  • Shannon Entropy

    This online calculator computes Shannon entropy for a given event probability table and for a given message

  • Side length of a right triangle

    Calculates the side length of a right triangle from two other sides using Pythagorean theorem. Created by user's request

  • Side length of a triangle

    This calculator computes side length of a triangle given two sides and angle between them (law of cosines)

  • Side length of the regular polygon

    Calculates the side length of the regular polygon circumscribed or inscribed to a circle. Created by user's request

  • Side of regular polygon from polygon area

    Calculates the side length of regular polygon given the area of the regular polygon and number of sides

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