Clean up the area where you will be putting the steps, and dig down about 3 inches lower than the grade. Put a pad of compacted road mix down over the flattened and leveled area. Using a level, and a...
IF you knew the volume of the block and the density of the material it was made of you could calculate it mass (mass = density * volume) but it is normal to measure the mass of something using a mass...
Mass(m) = the amount of matter contained in an object Weight (W) = mass x gravitational force = mg - on earth g = 9.81 kg/ms-2 or Newtons(N) so W = m x g m = W / g Kg