Online calculator catalog
Life 56
	Calendar   Week days calculator,   Week number of a given date,   Julian and Gregorian calendars,   Time between two dates with time zone,   Date and number of working days (for Russia), ... +16
	Date and Time   Number of days in a year,   Convert days to years, months and days,   Date weeks out or before,   Time difference between the cities,   Time zones, ... +40
	Health   Body fat calculator - YMCA formula,   Ideal weight calculator using Body Mass Index,   Ideal weight calculator using Paul Broca formula,
Professional 166
	Computers   Binary Coded Decimal (BCD),   Hill cipher,   Shannon coding,   Conversion between any bases,   Caesar cipher, ... +18
	Engineering   Geometric progression,   Cartesian and polar two-dimensional coordinate systems,   Liquid level in the tilted cylinder,   Triangle angles for given triangle sides,   Tank volume, ... +48
	Finance   Simple Interest,   Bank card number validation,   Compound interest,   Percentage,   The calculation of amortization for tax purposes, ... +11
	Navigation   Prospect distance from the ground and line of sight distance between two observers,   Distance calculator,   Earth Radius by Latitude (WGS 84),   Compass Points,   Beaufort scale, ... +12
	Statistics   Exponential smoothing,   Z-score / Standard score,   Text fitness (version 2),   Binomial distribution, probability density function, cumulative distribution function, mean and variance,   Lagged scatterplot, ... +39
	Telecommunications   Telecommunications traffic, Erlang,   Flag semaphore signals,   PBX channel number calculation,   VOIP call bandwidth,
	Units converters   Beaufort scale,   Number of days in a year,   Conversion from decimal numeral system,   Nautical measurement units,   Imperial to Metric and Metric to Imperial measures of length converter, ... +14
Study 242
	Astronomy   Sunrise and sunset time,   Angular size, linear size and distance,   Azimuth and solar elevation angle,   Sun position at a given date. Azimuth and elevation table.,   Sunrise and sunset calculator, ... +2
	Chemistry   Clapeyron-Mendeleev equation. The relationship between the number of moles of gas, the temperature, volume and pressure.,   Chemical equation balancer,   Convert moles to grams and grams to moles.,   CaCl2 ppm to chlorides WPS ppm converter,   Molar volume, ... +6
	Math   Factorial,   Newton's method,   How many circles of radius r fit in bigger circle of radius R,   Combinations generator,   Z-score / Standard score, ... +173
	Physics   Volume of body given the buoyant force,   Kinematic Equations for Uniform Acceleration,   Surface tension. Weight and volume of the drop of liquid,   Tips and tricks #5: How to show/hide input and output controls in a calculator,   Boiling point dependence on the altitude above sea level, ... +42