The calculators presented in this article are capable of converting units of length between the old Russian system of measurement and the metric system.

Converter from exotic length units to meters

This calculator converts european shoe size to its english and US counterparts.

This online calculator can be used for conversion of kilograms to pounds, ounces and grains as they are used in USA or UK.

Energy units converter (joules, kilowatt-hour, kilogram force per meter, horsepower per hour, kilocalories)

This calculator can convert numbers ranging from 1 to 3999 between Roman numerals and decimal numbers.

This online calculator allows users to convert temperature values between the seven most widely used temperature scales. These scales are Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Réaumur, and Rømer.

Morse Code translator

Converts old Russian monetary units into more common rubles and kopecks. Created by user's request.

This online calculator converts the value of an angle given in the degrees-minutes-seconds to degrees, expressed in decimal fraction and back from decimal fraction to degrees-minutes-seconds.

This article is about the relation between an image size in pixels and a photographic print size. First, it recommends the photographic print size for given digital image dimensions in pixels. Second, it finds the resulting pixels per inch value for a printed digital image with known linear and pixel dimensions.

Power units converter.

This converter decodes URL-encoded string (percent-encoded characters). It converts reserved characters as well as UTF-8 characters

The first calculator converts relative humidity to absolute humidity for a given temperature and barometric pressure. The second calculator does the opposite - converts absolute humidity to relative humidity for a given temperature and barometric pressure. Some theory and formulas can be found below the calculator.

The calculator transforms text into Morse code and then replaces dots and dashes with user-specified symbols. This can be a fun way to create unique messages that can be shared with friends and family. Users can choose any symbols they want to replace dots and dashes with, making the messages even more personalized.

The calculator gives telecom traffic in Erlang for given time span and total call duration.

The calculator converts english phrase to the flag semaphore signal sequence.

This calculator allows users to enter time in various units such as days, hours, minutes and seconds in any combination and then normalizes the value into days, hours, minutes and seconds. The calculator also displays the entered time in other units such as hours plus minutes plus seconds, minutes plus seconds, and seconds only.

Th calculator converts the html table code to JSON array with optional data transpose and compression. It also visualizes numeric data on chart.