Online calculator catalog
Life 125
	Calendar   Days between dates. The historical version.,   Coptic calendar,   Gregorian date to Julian date,   Gregorian date to Hindu mean solar calendar,   Fixed date to Gregorian date, ... +14
	Date and Time   Date and number of working days (for Russia),   Azimuth and solar elevation angle,   Sunrise and sunset calculator,   How many months are there between two dates?,   City Timezone Converter, ... +60
	Health   Coronavirus disease epidemic in different countries,   Pregnancy Due Date Predictor,   Determination of the baby's sex,   Daily Calorie Rate,   Proportional Body Calculator: McCallum's Formula, ... +13
Professional 327
	Computers   RAID arrays сalculator,   Shannon Entropy,   The Phone Number Extractor,   Line Reverser,   Huffman coding, ... +60
	Engineering   Relations between Mass, Length, Width, and Area Density of Fabric,   Oval Tank Volume Calculator,   Barlow formula,   Coillator 3,   Cylinder Segment Volume Calculator: Find the Volume of a Cylindrical Segment, ... +34
	Finance   Unused leave compensation at dismissal,   Real interest rate using Fisher equation,   Percentage,   Calculation of payments on corporate property tax,   Russian Central Bank Exchange Rate Converter, ... +30
	Image processing   Color to Grayscale Conversion,   Jpeg image meta-data,   Watercolor Filter,   Image color set,   Morphological filters, ... +6
	Navigation   Tidal gate calculator (Rule of twelfths),   Ford VIN decoder - Line information,   Fuel consumption,   City objects observation,   Points of the compass, ... +16
	Statistics   Negative Binomial Distribution. Probability density function, cumulative distribution function, mean and variance,   Exponential Moving Average,   Number to Probability,   Generator of random Russian first and last names and surnames with frequency of occurrence,   Chande momentum oscillator indicator, ... +32
	Telecommunications   Number of agents in a call center,   PBX channel number calculation,   VOIP call bandwidth,   Morse Code Converter: Translate and Decode Messages, ... +1
	Units converters   Conversion of pounds into inches,   Digital image size in pixels and photo print size,   Plane angles measurement systems,   Pounds to kilograms conversion and vice versa,   Area Converter, ... +19
	Сryptography   MyDates,   Tips and tricks #3: How to make calculator with custom errors,   Batch conversion from one number system to another,   A2Z52 encoder/decoder,   The next lucky ticket, ... +84
Study 420
	Astronomy   Dates of the beginning and end of polar night and polar day at a given latitude,   Declination and maximum altitude of the Sun above the horizon on a given date,   Shadow length,
	Chemistry   Convert grams to moles and moles to grams,   Acid-base titration curves,   Finding the reactions for the chain of transformations,   Molarity to molality and vice versa,   Convert grams to liters and liters to grams, ... +20
	Math   2D Bin Packing Problem Solver,   Surface area of a cube,   Team Combinations Generator,   Solution of nonhomogeneous system of linear equations using matrix inverse,   Roman and Decimal Number Converter, ... +310
	Physics   Projectile Motion Calculator,   Petroleum product density,   Hydrostatic pressure,   Centripetal Force Solver,   Average Pressure, psia, ... +61