# All online calculators

- 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.

- Isogram checker
This online calculator can check if a word/phrase is an isogram.

- 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

- Jaccard / Tanimoto Coefficient
This online calculator measures the similarity of two sample sets using Jaccard / Tanimoto coefficient

- Julian and Gregorian calendars
Julian and Gregorian calendars date conversion

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

- Keyboard layout and password
Converts the word, typed in Russian letters into a set of symbols corresponding to these letters in English keyboard layout which is often used to create a Russian-speaking user passwords.

- Kinematic Equations for Uniform Acceleration
This calculator will help you to solve uniform acceleration problems using kinematic equations

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

- Labor retirement pension amount (for Russia)
Calculates labor retirement pension amount in accordance with the law.

- Lagged scatterplot
This online calculator builds scatterplot of the time series against itself offset in time

- Laminate flooring. The calculation of the number of planks
The calculation of the number of planks requiered

- Land tax
Calculates the land tax

- Large breed puppy weight gain recommendations
Large breed puppy weight gain recommendations

- Least Common Denominator for several fractions
Least Common Denominator for several fractions

- Length of service calculation
Length of service calculation for several periods of work

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

- 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)