On Sep 26 , at 8:33 PM, Stan Jakuba wrote:
The SI symbol for what some call the metric ton is 1000 kg or 1 Mg,
the latter pronounced "megagram, not "tonne."
The "tonne" cannot be SI for many reasons.
Stan Jakuba
But, Stan, the tonne is listed as a non-SI unit acceptable for use
with SI in the official SI manual from BIPM, 2006 edition (the
latest). That publication lists the tonne as being equivalent to 1000
kg and as having the symbol "t".
Of course, it is not an SI unit, just as the litre is not an official
SI unit. As such, limiting its use is perhaps advisable but it is
still allowable.
Bill Hooper
0.074 t body mass, plus or minus 0.001 t or so. (Ha, ha, ha!)
Fernandina Beach, Florida, USA
