Calculators
Find the area of a =

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Enter a number in either field, then click outside the text box.
F:
C:

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Length Equivalents
First, type the number you wish converted here:
Then, click radio buttons for desired conversion:
From: Centimeters
Inches
Feet
Yards
Meters
Chains
Kilometers
Miles
To: Centimeters
Inches
Feet
Yards
Meters
Chains
Kilometers
Miles

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by The JavaScript Source

A few that I thought might be useful
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If you need more than what's on this page or the next ...then try this link
Convert-Me.Com: Interactive Units Conversion