Chuck, I'm glad you cited the simplified form. I believe that the original may have been derived as: European Minutes = ln( exp(US Minutes) ) Also, for those that don't like transcendental functions, an alternative is: European Minutes = modulo( 31 * US_Minutes * 37, 1147) However, this formulation is not valid for fractional minutes. Andy. Charles Demas wrote: > On Sat, 21 Aug 1999, =Mark wrote: > > Could you provide the conversion tables for changing the US minutes to > > European or Asian minutes? > The conversion is computed differently for each. :-) > 1 European Minute = 1 US Minute x ln( e ) > whereas > 1 Asian Minute = 1 US Minute / ln( e ) > Hope this helps. :-)