Online calculator catalog
Life 120
	Calendar   Roman calendar,   Fixed date to Gregorian date,   Coptic calendar,   ISO calendar,   Gregorian date to Hindu mean lunisolar calendar, ... +14
	Date and Time   Day of the week by date,   Weeks to months converter,   Russian non-working days,   Travel Duration,   Date and interval, ... +59
	Health   Strength of alcoholic cocktail,   Determination of the baby's sex,   Nagler's ideal weight calculator,   Weathering of alcohol concentration in the blood,   Daily Calorie Rate, ... +14
Professional 244
	Computers   CSV table to JSON array,   Keyboard layout and password,   Text file encoding,   LL1 grammar analysis. Yet another top-down parser generator.,   Information gain calculator, ... +60
	Engineering   Square Stack Calculator,   Square Door Tank Volume,   Wallpaper calculator,   Heat Index,   Relations between the mass, the length, the width, and the area density (surface density) of the fabric, ... +31
	Finance   Compound interest,   When it becomes profitable to pay the tax as a sole proprietor in Russia?,   Compound interest. Arbitrary payment,   Tax deductions from personal income tax,   Mortgage calculator, ... +30
	Image processing   Image manipulation,   Digital images parameters comparison,   Box filters for image processing,   Color to Grayscale Conversion,   Watercolor effect, ... +5
	Navigation   Tidal gate calculator (Rule of twelfths),   Russia's regional registration plates,   Prospect distance from the ground and line of sight distance between two observers,   Compass, magnetic and true course calculator,   Distance between two cities, ... +15
	Statistics   Negative Binomial Distribution. Probability density function, cumulative distribution function, mean and variance,   Histogram group number,   Seasonal Indices for Quarterly Data,   Geometric Distribution. Probability density function, cumulative distribution function, mean and variance,   Text fitness (version 3), ... +27
	Telecommunications   Morse code. Mutator,   Morse Code,   PBX channel number calculation,   Number of agents in a call center, ... +1
	Units converters   Pressure units converter,   Nautical measurement units,   Conversion of decimal number to other notations,   Height in the old Russian system of measures,   Imperial to Metric and Metric to Imperial measures of length converter, ... +19
	Сryptography   Rail fence cipher,   Kasiski test,   Vigenère cipher breaker,   Pigpen cipher decoder,   Gravity Falls Author's symbol substitution cipher decoder, ... +11
Study 378
	Chemistry   Molar mass of the substance,   Molar volume,   Alcohol amount in the aqueous alcohol solution,   Convert moles to liters and liters to moles,   Convert grams to moles and moles to grams, ... +15
	Math   Runge–Kutta method,   Evaluating expressions,   Spiral calculator,   Geometric progression. The common ratio and the first term,   Cross product calculator, ... +293
	Physics   Altitude difference by barometric formula,   Quantity of heat,   Capacitor in Direct Current Circuit,   Humidification load calculator,   Gas concentration from ppm to mg/m³ and vice versa, ... +50