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Calculators

How Far Is It?

The "How Far Is It?" service uses data from the U.S. Census and a supplementary list of cities around the world to find the latitude and longitude of two places, and then calculates the distance between them (as the crow flies). It also provides a map showing the two places, using the Xerox PARC Map Server.

Martindale's Reference Desk: Calculators On-Line Center

This site provides very extensive set of Java script based online calculators that cover many subjects.

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