None.
A kilogram is a measure of mass. A cubic metre is a measure of volume. The two measure different things and,according to basic principles of dimensional analysis, conversion from one to the other is not valid.
If you are not convinced, consider a cubic metre of air. How many kilograms? Next consider a cubic metre of lead. How many kilograms?
The masses of equal volumes of the two substances will clearly be very different. So there is no direct conversion between mass and volume: you need to know the density of the substance to enable you to carry out the conversion.
45
45 cubic km = 10.8 cubic miles
45
45 kg = 45000 g
45 US gallons = 0.17034353 cubic meters
I cubic foot = 28.316847 litres so 45 cubic feet = 1,274.2581 litres
An 80 pound bag of premix concrete will make .6 cubic feet of cured concrete. There are 27 cubic feet in a cubic meter, so it would take 45 80 pound bags to make one cubic meter.
450 grams
45 lbs = 20.45 kg
45 centimeters = 1.476 feet.
45kg = 99.208 pounds.
(45 hectometer)*(100 meter/hectometer)*(10 decimeter/meter) = 45000 decimeters