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27,68089 inch of water = 1 psi 51,715 mm of mercury = 1 psi; 742 col. Hg = 14,347 psi 742 col. Hg = 0,515 inch of water
1 Hg = 100 g
Inches of mercury x 0.4912 equals psi
2
Assuming Hg is hectogram, 1 Hg = 0.22046 pounds 1 pound = 4.5359 Hg