That is how it should be done. It is like the metric system. Sure it is a more accurate system and some day will be the norm world wide. But there are still millions here who use the old system of inches and pounds, etc. Until there is hardly anyone alive who uses the old system, they should use both when labeling and instructions here in the US at least. I mean even inches/feet is better than cubic, which was based on the length of a man's distance between his elbow and the end of his hand. So progress has been made.