1 point = 1/72 Inches therefore 72 points = 1 Inch.

An simple way to get the approx. length of the text would be to use the VFP TxtWidth function and apply the maths above.

lnPixelsX = txtwidth(lcString, lcFontName, lnFontSize) * ;
fontmetric(6, lcFontName, lnFontSize)

lnInchesX = lnPixelsX / 72