12 US tons is 10,890kg
3.5 tons is 3,175.1 kilograms.
12 US tons is 10,890kg
160 tons is 145,150 kilograms.
2.3 US tons is 2,087 kilograms.
Three US tons is 2,721.6 kilograms.
90 short tons = 81,646.6266 kilograms
6,350.3 kilograms per 7 US tons.
7.7 US tons is 6,985.3 kilograms and 7.7 metric tons is 7700kg
6.5 million US tons is 5,896,700,810 kilograms.
Assuming you mean metric tonnes, multiply that by 1000 to convert to kilograms.
2300 kilograms = 2.3 metric tons.
1.75 US tons is 1,588kg