All online calculators

Coulomb's law

This online calculator calculates unknown (whether force, charge or distance) using known values using Coulomb's law scalar formula. It can be used to solve physics problems.

Coulomb's lawCreative Commons Attribution/Share-Alike License 3.0 (Unported)
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  • Cryptarithmetic puzzle solver

    This calculator is a solver of cryptarithmetic puzzles. Cryptarithmetic puzzle is a number puzzle in which a group of arithmetical operations has some or all of its digits replaced by letters or symbols, and where the original digits must be found. In such a puzzle, each letter represents a unique digit.

  • Cube
  • Cubic equation

    Solution of cubic equation using Vieta's formulae. Created by user request

  • Cylinder
  • Cylindrical tank volume

    Cylindrical tank volume

  • Date and interval

    Adds and subtracts a specified time interval to the specified date

Date plus days

This online calculator computes the result of addition/subtraction of the given number of days to the given date.

Date plus daysCreative Commons Attribution/Share-Alike License 3.0 (Unported)
  • Date and number of working days

    Calculator calculates the date of the initial date and the number of working days. Taking into account weekends, holidays and weekend shifts at work days, according to the published decrees of the government of the Russian Federation. Created by user's request.

  • Day of week by date

    This online calculator outputs day of week for given date

  • Density of oil

    Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard

  • Derivative calculator

    Online calculator which determines first derivative of a function

  • Determinant of 3x3 matrices

    This calculator calculates the determinant of 3x3 matrices

  • Determinant of a matrix

    This online calculator computes determinant of a matrix, using it's definition

  • Determining air humidity with psychrometric method

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