- Inverse Hyperbolic Functions
Calculation of inverse hyperbolic functions of given argument

- Inverse of a matrix
Calculating inverse matrices via adjugate matrix

- Inverse trigonometric functions
This calculator determines values of inverse trigonometric functions (arcsine, arccosine, arctangent, arccotangent, arcsecant, arccosecant) and outputs it with different measurement units (degrees, radians, minutes, etc)

- Involute of an angle
Involute of an angle calculator and finding an angle by the given involute.

- Issue number generator
Issue Number Generator for unnumbered magazines & comics & newspapers. If magazine did not print issue numbers, only dates, it can number them all, f.e. all Sundays starting with specified date up to specified date

- Julian and Gregorian calendars
Julian and Gregorian calendars date conversion

The calculation of the number of planks requiered

- Julian Day
Calculation of Julian day for given date plus some information about it

- Kinematics. The Equations for Uniform Acceleration
This calculator will help you to solve uniform acceleration problems

- Kinematics. Throwing body up problem
Kinematics problem from the Svetozarov's book for MEPI matriculates

- Lengths of triangle sides given one side and two angles
This online calculator determines lengths of triangle sides given one side and two angles

Least Common Denominator for several fractions

"One of the following characters is used to separate data fields: tab, semicolon (;) or comma(,)"

- Level of liquid in the cylindrical tank, AKA Quarter-Tank Problem
This online calculator finds the height above the bottom of a horizontal cylinder (such as a cylindrical gas tank) to which the it must be filled for it to be full at specified percentage (for example, one quarter full amounts)

- Levenshtein Distance
Online calculator for measuring Levenshtein distance between two words

- Linear Diophantine equations
This calculator solves linear diophantine equations.

- Liquid level in the tilted cylinder
Сalculates the level of the liquid in a tilted cylindrical tank with the tank parameters and the liquid volume.

- LL1 grammar analysis. Yet another top-down parser generator.
The calculator checks LL1 grammar correctness, parses a text using the grammar, shows FIRST, FOLLOW and FIRST PLUS sets, parsing tree and gives PLANETCALC parsing code.

- Loan payment example
- 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).

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