Les, I was going to say, "You beat me to it," but ...
acre = 43,560 square feet
cu ft = 3,630 (divide above by 12)
lb = 226,613.5 (multiply by 62.43 lb per cu ft)
kg = 102,790.15
metric:
acre = 4,046.9 square metres
cu m = 40.469 (1 cm deep)
cu m = 102.79 (1 inch deep)
kg = 102,790 (cu m = 1000 kg)
lb = 226,613.2
Give or take, due to rounding. Also, THEA didn't mention the temperature.
Anyway, re the JE, I'm in.