To convert kilograms to tons divide by 1000. I've generated some hopefully helpful examples randomly below, as with most random sentences please excuse the repetitive and occasionally comic outcomes.
To convert 920 kilograms into tons divide by 1000 giving 0.92 tons.
You have 480 kilograms of oats but you need to know how many tons that is. To get the answer divide by 1000 which gives you 0.48 tons.
You've got 480 kilograms of wheat but someone only wants to buy that in units of tons, to change the units divide by 1000. Now you have 0.48 tons.