- Hydrostatic pressure
This online calculator can solve hydrostatic pressure problems by finding unknown value in hydrostatic equation.

- Hyperbolic functions
Calculation of hyperbolic functions

- Incircle of a triangle
This online calculator determines the radius and area of the incircle of a triangle given the three sides

- Integer factorization. Trial division
Integer factorization using trial division algorithm.

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

- Inverse of a matrix
Calculating inverse matrices via adjugate matrix

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

- 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.

- 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

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

This calculator solves linear diophantine equations.

- 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)

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

- 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.

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