Something to remember in the equations:
1/4" Hi-Test G-40 chain weighs 0.74 lbs. per ft, so 50 ft weighs 37 lbs, 100 ft weighs 74 lbs, and 150 ft weighs 111 lbs.
Add a 15-25 lb anchor to these figures above, and you'll soon realize you need a windlass to raise the anchor once its down! In...