It's a definition, was Re: Conversion

The metric to inch conversion at 1" = .0254m is a legal and exact
definition since 1959.

http://physics.nist.gov/Pubs/SP811/appenB9.html

is the closest I know of to a definitive reference in the US for metric
conversion factors.

"Factors in boldface are exact," others are rounded.

Best regards,

Randy

Randy Gordon-Gilmore ,----.___________ ______________ _________________
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