Ben M, you are right sir!
Not to pick you up but it should be 'tonne' or 'metric ton' to technically be 1000kg.
The imperial ton is slightly different (can't remember which way)
And, annoyingly, if you buy a ton/tonne/metric ton of (say) gravel from Jewsons or such, they're only 850kg!
A bit like going into KFC saying 'ill have a coke and a chicken wing' they confirm your order saying 'a Pepsi and a chicken wing'
In Jewsons you say 'I need a tonne of type 2 buff and a tube of gripfill' they confirm your order by saying 'so, that's one bulk bag of type 2 buff and a tube of gripfill'
Random irritation over.