This depends on the substance you are measuring. If you are measuring water:
1 US gallon weighs 3.78541178 kg
1 UK (Imperial) gallon weighs 4.54609118 kg
12.25 kgs equals about 5.55650653 kilograms
166.6 pounds is 75 (75.568489) kg
One tonne is 1000 Kgs, so 20 tonnes would equal 20,000 Kgs.
Assuming it's a gas, 0.717kg
If we assume an average weight of one stone to be 6.35 kgs, then 73 kgs would be approximately 11.49 stones.
765 g equals .765 kgs
5,600 pounds equals 2540.1 (2540.117) kg
166 g = 0.166 kg
30 pounds equals 13.6 (13.6078) kg
2lbs = 0.9 (0.907185) kg
38 pounds is 17 (17.2365) kg
450,000 grams are in 450 kilograms.
They cannot be compared. kgs. are a unit of weight, not distance.
check your answer
1 cbm of what? If water, than 1000 kgs
kPa is pressure, how much area is the pressure acting on
12.25 kgs equals about 5.55650653 kilograms