How many ton in 49.400 CWT?
Approx 2.5 tons.
It really depends where you are. The hundredweight, or cwt is different in different countries. In the UK 1cwt is 112lb, in the USA 1cwt is 100lb. A UK cwt = 50.802kg, so 19.6 cwt = 999.719kg. A USA cwt = 45.359kg, so 19.6 cwt = 889.036kg. One of the many advantages of the SI is that it is the same everywhere.