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• VARIANT DATE to datetime string

  This online calculator converts VARIANT DATE (double) value to datetime string.

• 3d coordinate systems

  Transforms 3d coordinate from / to Cartesian, Cylindrical and Spherical coordinate systems.

• 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.

• 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.

• 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. 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

• Plane angles measurement systems
• Shoe size comparison

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

• 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

• 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.

• Morse Code

  Morse Code translator

• Pounds to Kilogramms convertion and vice versa

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

• Power to the People

  Power units converter.