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.

• Julian and Gregorian calendars

  Julian and Gregorian calendars date conversion

• 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

Kinematics. Throwing body up problem

Initial speed v (m/s):

Interval between throwings t, (s):

Calculation precision:0.12345678901234567890

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• Laminate flooring. The calculation of the number of planks

  The calculation of the number of planks requiered

• Least Common Denominator for several fractions

  Least Common Denominator for several fractions

• 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

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.

LL1 parser generator

EBNF grammar:expr=term, expr1; expr1="+",term,expr1|"-",term,expr1|; term=factor, term1; term1="*", factor, term1 | "/", factor, term1|; factor="(", expr , ")" | number; number=digit , {digit}; digit = "1"|"2"|"3"|"4"|"5"|"6"|"7"|"8"|"9"|"0"; syntax=expr;

Expression:(1+2)/3*(4+5)

Remove rules:

Show FIRST/FOLLOW sets

Show parsing tree.

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• 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.

• Loan payment example
• Logarithm

  This online calculator outputs logarithm of a number to a given base, as well as natural logarithm and common (decadic) 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.