Well at least for the Kilogram it isn’t!
It seem that the original measured weigh, the International Prototype Kilogram is loosing weight! Does this mean that all the calculations for converting from/to imperial weights will need to change?
Perhaps not. Here’s the full story for those Imperial die-hard’s, perhaps some Imperial Weight Terrorists have managed to sabotage the original Prototype Kilogram as part of their campaign to retain Imperial measurements in the UK.