I have often wondered about dual-unit tape measures with Ye Olde English inches along the top edge and nice SI-metric centimetres along the bottom edge. I hear it said that this arrangement favors inches to the detriment of metric. Here is a typical quote form "A Very British Mess" publication of the UKMA:

metric-only measuring tapes are very hard to obtain in the UK. The commonly-available dual tapes have imperial on top and metric on the bottom - making it awkward to use the metric edge.

Could some of you amateur carpenters out there explain to me why it is easier to use the markings on the top edge of the tape measure than the ones on the bottom edge? If there is a reason, why can't the tape be turned left to right so that the metric edge is on top (although the numbers would be upside down). That might also help left handed carpenters, I should think, since the tape would now extend from right to left instead of from left to right.

Or is this just another one of those "that's the way we've always done it so it's impossible to do it any other way" situations that really has no solid reason behind it?

Regards,
Bill Hooper
Fernandina Beach, Florida, USA
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Make it simple; Make it Metric
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