Online calculator catalog
Life 66
	Calendar   Number of working days between two dates (for Russia),   Number of days in a year,   Gregorian to fixed date,   Coptic calendar,   Gregorian calendar. Julian calendar. The calendar eras., ... +25
	Date and Time   Date and number of working days (for Russia),   Date by the Julian Day Number,   Number of working days between two dates (for Russia),   Total time,   Travel Duration, ... +43
	Health   Ideal weight calculator using Body Mass Index,   Ideal weight calculator using Paul Broca formula,
Professional 168
	Computers   Conversion from decimal numeral system,   Shannon coding,   Email extractor,   Conversion between any bases,   Symbol frequencies table, ... +18
	Engineering   Triangle angles for given triangle sides,   Level of liquid in the cylindrical tank, AKA Quarter-Tank Problem,   Number of flagstones for paving,   Volume of liquid in a tilted tank with hemispherical heads,   Arithmetic progression, ... +50
	Finance   When it becomes profitable to pay the tax as a sole proprietor in Russia?,   Progressive tax,   Compound interest,   Commission calculator,   Nominal interest rates сomparison, ... +11
	Navigation   Prospect distance from the ground and line of sight distance between two observers,   Course angle and the distance between the two points on loxodrome (rhumb line).,   Earth Radius by Latitude (WGS 84),   Tidal gate calculator (Rule of twelfths),   City objects observation, ... +12
	Statistics   Exponential smoothing,   Log-normal distribution,   Double exponential smoothing,   Student t-distribution,   Paired Sample t-Test, ... +39
	Telecommunications   PBX channel number calculation,   Number of agents in call center,   Telecommunications traffic, Erlang,
	Units converters   Conversion from decimal numeral system,   Conversion of fractional numbers between numeral systems,   Display aspect ratio and dimensions,   Converting degrees to radians,   Pressure units converter, ... +14
Study 305
	Astronomy   Sunrise and sunset calculator,   Sun position at a given date. Azimuth and elevation table.,   Sunrise and sunset time,   Shadow length,   Azimuth and solar elevation angle, ... +2
	Chemistry   Concentration of analyte with uncertaintly analysis for replicate titrations,   Molar mass of the substance,   CaCl2 ppm to chlorides WPS ppm converter,   Convert grams to liters and liters to grams,   Convert moles to liters and liters to moles, ... +11
	Math   Isometric projection of a vector,   Modular Multiplicative Inverse,   Complex polynomial value calculation,   Egyptian numbers,   Volume of a sphere, ... +231
	Physics   Saturation vapour pressure,   Boiling point dependence on the altitude above sea level,   The waves and the wind. Wave height statistical forecasting,   Angular velocity and linear velocity,   p-t Graph Analysis, ... +42