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

- Matrix Transpose
Matrix Transpose

- Mayan calendar, 2012, the end of the world.
About 2012, the end of the world and Maya

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

- Meters per second and kilometers per hour
This simple calculator convert meters per second to kilometers per hour and vice versa

- 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

- Moonphases
Moon's age and phase calculation

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

- Nautical measurement units
Nautical mile, sea mile, cable

- Nominal interest rates сomparison
Сalculation of the effective interest rates for a given nominals

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

- Number of agents in call center
The calculator works out number of call center agents using Erlang C formula for given call load and service level.

- Number of days in a year
- Number of flagstones for paving
This calculator will help you to estimates number of flagstones needed for paving

- Number of flagstones to units of area and vice versa
These calculators convert entered number of flagstones to area size and vice versa - calculate number of flagstones needed to cover entered ara size. Metric and imperial units are supported

- Number of working days between two dates
Calculator calculates the number of days between the two entered dates. Taking into account weekends, holidays and weekend shifts to work days, according to the published decrees of the government of the Russian Federation.

- Ohm's law
- Old Russian (Byzantine) system of chronology
Old Russian calendar - years since world creation

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