All online calculators

  • Log-normal distribution

    It calculates the probability density function (PDF) and cumulative distribution function (CDF) of long-normal distribution by a given mean and variance.

  • Logarithm

    This online calculator produces the logarithm of a given number with a given base. It computes also the natural logarithm and the common logarithm (decimal logarithm).

  • Luhn algorithm

    Calculates digit sequence checksum using Luhn algorithm (mod 10), calculates validation digit (the digit to be appended to the digit sequence to make whole sequence ckecksum equal to zero).

  • Math equation simplification

    Simplifies math equation with single variable (x). In eqation you may also use integer and fractional numerical constants arithmetic operations, trigonometric and hyperbolic functions.

  • Math equation syntax

    Math equation samples.

Loan payment example


Credit cost

Credit amount

Period in years

Annual interest rate (percent)

Digits after the decimal point: 2
  • Math operations on degrees

    This online calculator supports simple mathematical operations, addition/subtraction/multiplication/division, on degrees

  • Math worksheets generator for elementary school

    Random worksheets, which are generated automatically from user parameters.

  • Mathematical calculator

    Mathematical calculator is used for evaluation math expressions with arithmetic operations (+-/*^) and functions: sqrt - square root, exp - exponential function, lb - binary logarithm, lg - decimal logarithm, ln - natural logarithm, sin - sine, cos - cosine, tan - tangent, cot - cotangent, sec - secant, csc - cosecant, arcsin - arcsine, arccos - arccosine, arctan - arctangent, arccot - arccotangent, arcsec - arcsecant, arccosec - arccosecant and others

  • Mathematical competition tasks

    Calculator solving some mathematical competition task

  • Matrix Multiplication

    Matrix Multiplication

  • Matrix Rank

    This online calculator determines the rank of a given matrix

Mayan calendar, 2012, the end of the world.

About 2012, the end of the world and Maya


Gregorian to Mayan calendar conversion