- 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.

- 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).

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.

- 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

To calculate definite integral by the rectangle method, trapezoid method, Simpson method or other Newton-Cotes quadrature methods.

- Matrix Rank
This online calculator determines the rank of a given matrix

- Matrix Transpose
Matrix Transpose

- Median of a triangle
This online calculator computes median of a triange given triangle sides

- Modular inverse of a matrix
This calculator finds modular inverse of a matrix using adjugate matrix and modular multiplicative inverse

- Modular Multiplicative Inverse
This calculator calculates modular multiplicative inverse of an given integer a modulo m

- Multiplication in columns
Calculator shows results of multiplying in columns, can be used to check answers

- Normal distribution
Plots the CDF and PDF graphs for normal distribution with given mean and variance.

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