PRESSURE AND LIQUID HEAD kilogram pound Atmosp- foot inch metre cm inch mm force/ force/ here water water water mercury mercury mercury square square centimetre inch bar1 kgf/cm2 lbf/in2 atm ft H2O in H2O m H2O cm Hg in Hg mm Hg (105N/m2) (psi) (torr) ======================================================================================= 1 1.0197 14.5038 0.9869 33.4553 401.463 10.1972 75.0062 29.530 750.062 0.9807 1 14.2233 0.9878 32.8084 393.701 10 73.556 28.959 735.559 0.0689 0.0703 1 0.0609 2.3067 27.68 0.7031 5.1715 2.036 51.715 1.0133 1.0332 14.6959 1 33.889 406.782 10.3323 76.0 29.9213 760 0.0299 0.0305 0.4335 0.0295 1 12 0.3048 2.242 0.8827 22.4198 0.0025 0.0025 0.0361 0.0025 0.0833 1 0.0254 0.1868 0.0734 1.8683 0.0981 0.1000 1.422 0.0968 3.2808 39.3701 1 7.3556 2.896 73.356 0.0133 0.0136 0.1934 0.0132 0.4461 5.3542 0.136 1 0.3937 10 0.0339 0.0345 0.4911 0.0334 1.133 13.5951 0.3453 2.54 1 25.4 0.0013 0.0014 0.0193 0.0013 0.446 0.5352 0.0136 0.1 0.0394 1