Online calculator catalog
Life 125
	Calendar   Days between dates. The historical version.,   Indian calendars,   ISO calendar,   Gregorian to fixed date,   Fixed date to Gregorian date, ... +14
	Date and Time   How many workdays between two dates?,   Azimuth and solar elevation angle,   Age Calculator,   Old Russian (Byzantine) system of chronology,   The Muslim calendar. The Gregorian calendar conversion, ... +60
	Health   The number of packs steroid you need for cycle,   Brunhard's formula ideal weight calculator,   Daily Calorie Rate,   Pregnancy Due Date Predictor,   Nagler's Ideal Weight Calculator, ... +13
Professional 327
	Computers   Check Digit Mod 11 (ISBN-10 check digit),   Shannon Entropy,   Ancient PixelArt: CompuServe RLE file viewer,   Base 64 encoding and decoding,   Count the number of words, ... +60
	Engineering   Baffle Plate Gap Calculator,   Calculating the parts given the ratio and total amount,   Cylinder Segment Volume Calculator: Find the Volume of a Cylindrical Segment,   Laminate flooring. The calculation of the number of planks,   Air Flow Calibration, ... +34
	Finance   Tax deductions from personal income tax,   Accrual-Based Compound Interest Calculator,   Progressive tax,   Effective Interest Rate Calculator,   Russian Central Bank Exchange Rate Converter, ... +30
	Image processing   Digital images parameters comparison,   Jpeg image meta-data,   Color to Grayscale Conversion,   Median filter,   Image color set, ... +6
	Navigation   Compass Points,   Prospect distance from the ground and line of sight distance between two observers,   Earth Radius by Latitude (WGS 84),   Ford VIN decoder - Line information,   Fuel consumption, ... +16
	Statistics   Analytical performance indicators,   Sсhorygin similarity coefficient for a series of samples,   Generator of random Russian first and last names and surnames with frequency of occurrence,   Chande momentum oscillator indicator,   Text fitness (version 3), ... +32
	Telecommunications   Morse Code Converter: Translate and Decode Messages,   Morse-ify and Modify.,   VOIP call bandwidth,   PBX channel number calculation, ... +1
	Units converters   Pounds to kilograms conversion and vice versa,   Russian Length Unit Converter,   Exotic length units,   Area Converter,   Number of flagstones to units of area and vice versa, ... +19
	Сryptography   Tips and tricks #2: How to make calculator translatable into different languages ,   Compound interest including commissions on the loan amount,   Simple interest rate calculator,   Proportionality of the figure 2,   Rail fence cipher, ... +84
Study 420
	Astronomy   Shadow length,   Dates of the beginning and end of polar night and polar day at a given latitude,   Zero Shadow Day,
	Chemistry   ABV (Alcohol by volume),   Molar Mass Calculator,   Molar mass of the substance,   Convert grams to moles and moles to grams,   Acid-base titration curves, ... +20
	Math   Apparent length from angular size,   Complex Fraction Simplifier,   Polynomial power expansion,   Mathematical competition tasks,   Egyptian numbers, ... +310
	Physics   Average Temperature, °R,   p-t Graph Analysis,   Thermodynamics – calculator for solving mixing problems,   Lifting force of a helium-filled balloon,   Wind Chill Index, ... +61