Online calculator catalog
Life 121
	Calendar   Days between dates. The historical version.,   Roman calendar,   365 days calendar date to Gregorian date,   Coptic calendar,   Fixed date to Gregorian date, ... +14
	Date and Time   Time scales,   Sun position at a given date. Azimuth and elevation table.,   How many workdays between two dates?,   Tips and tricks #14: How to use a masked input,   The Muslim calendar. The Gregorian calendar conversion, ... +60
	Health   Coronavirus disease epidemic in different countries,   The basal metabolic rate,   Ideal Weight Calculator,   Weathering of alcohol concentration in the blood,   Nagler's Ideal Weight Calculator, ... +13
Professional 325
	Computers   Bit length,   Audio Tone Generator Calculator,   Check Digit Mod 11 (ISBN-10 check digit),   LZW,   Count the number of words, ... +60
	Engineering   Throat Calculator for Cylindrical Tanks,   Equilibrium moisture content ,   Square Door Tank Volume,   Barlow formula,   Heat Index Calculator, ... +34
	Finance   Unused leave compensation at dismissal,   Price based on running meter,   Price Comparison Per Square Meter Calculator,   Progressive tax,   Tax deductions from personal income tax, ... +30
	Image processing   Image Flip & Rotate,   Morphological filters,   Digital images parameters comparison,   Color to Grayscale Conversion,   Jpeg image meta-data, ... +6
	Navigation   Distance between two cities,   Earth Radius by Latitude (WGS 84),   Tidal gate calculator (Rule of twelfths),   Fuel consumption,   Distance through the Earth, ... +15
	Statistics   Negative Binomial Distribution. Probability density function, cumulative distribution function, mean and variance,   Paired Sample t-Test,   Poisson Distribution. Probability density function, cumulative distribution function, mean and variance,   Number to Probability,   Double exponential smoothing, ... +32
	Telecommunications   PBX channel number calculation,   Morse-ify and Modify.,   VOIP call bandwidth,   Number of agents in a call center, ... +1
	Units converters   Speed Converter,   Conversion of pounds into inches,   The Decimal to Binary, Hexadecimal, and Octal Converter,   Digital image size in pixels and photo print size,   Pressure units converter, ... +19
	Сryptography   Linear intersection,   Convert RGB integer colours to hexadecimal color code for web,   Standard Galactic Alphabet decoder,   Largest common subsequence,   Tab and Line Break Remover, ... +83
Study 419
	Astronomy   Dates of the beginning and end of polar night and polar day at a given latitude,   Zero Shadow Day,   Declination and maximum altitude of the Sun above the horizon on a given date,
	Chemistry   pH of a solution calculator,   Molar mass of the substance,   ABV (Alcohol by volume),   Molar Mass Calculator,   Acid-base titration curves, ... +20
	Math   Derivative of a function raised to the power of itself,   Bell triangle,   Noisy function generator,   Cylindrical Tank Inner Volume Calculator,   Eigenvalue calculator, ... +309
	Physics   Wind Energy and Wind Power Calculator,   Electrical conductivity and total dissolved solids,   Buoyant Force Calculator - Weight of Displaced Liquid,   Altitude difference by barometric formula,   The Speed of Sound Calculator for Ideal Gases, ... +61