1 Atmosphere = 30 inches of mercury at 62 deg F = 14.7 pounds per square inch = 2116.3 pounds per square foot = 33.95 feet of water at 68 deg F.

1 Foot of water at 68 deg F = 62.355 pounds per square foot = 0.433 pounds per square inch

1 Inch of Mercury at 68 deg F = 1.132 feet of water = 13.58 inches of water = 0.491 pounds per square inch

Column of water 12 inches high, 1 inch in diameter = .341 pounds