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Conversion between metric units of length and old Russian system of measures units of length
The calculators in this article convert units of length from old Russian system of measures units to metric units and back.
Degrees-minutes-seconds to decimal degrees conversion and vice versa.
This online calculator converts the value of an angle given in the form of the degrees-minutes-seconds to degrees, expressed in decimal fraction and back from decimal fraction to degrees-minutes-seconds.
Digital image size in pixels and photo print size
This article is about relation between image size in pixels and photographic print size. First, it recommends photographic print size for given digital image dimensions in pixels. Second, it finds resulting pixels per inch value for printed digital image with known linear and pixel dimensions.
Energy measurement units
Energy unit converter (joules, kilowatt-hour, kilogram force per meter, horsepower per hour, kilocalories)
Exotic length units
Converter from exotic length units to meters
Flag semaphore signals
The calculator converts english phrase to the flag semaphore signal sequence.

This online calculator can be used for convertion of kilogramms to pouns, ounces and grains as they are used in USA or UK.

Weight in kilogramms

Gregorian calendar. Julian calendar. The calendar eras.
The calculator convers julian calendar date to gregorian calendar date taking in account the calendar era.
HTML table to JSON array
Th calculator converts the html table code to JSON array with optional data transpose and compression. It also visualizes numeric data on chart.
Morse Code
Morse Code translator
Morse code. Mutator
Transforms text into Morse code and than changes dots and dashes into specified symbols
Old Russian money
Converts old Russian monetary units into more common rubles and kopecks. Created by user's request.
Petroleum product density
Petroleum product density conversion, according to GOST 3900-85

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

Euro Size

Calculation precision

Digits after the decimal point: 1

Plane angles measurement systems
Power to the People
Power units converter.
Relative humidity to absolute humidity and vise versa calculators
First calculator converts relative humidity to absolute humidity for given temperature and barometric pressure. Second calculator converts absolute humidity to relative humidity for given temperature and barometric pressure
Roman numerals
Converter of Roman numbers and decimal numbers
Telecommunications traffic, Erlang
The calculator gives telecom traffic in Erlang for given time span and total call duration.
Temperature scales
Conversion between different temperature scales