1 N/㎡ = 10 dyn/㎠ 1 bar = 10^6 dyn/㎠ 1 atm = 760 mmHg 1 atm = 1.013 x 10^6 dyn/㎠ 760 mmHg = 1.013 x 10^6 dyn/㎠ 1 mmHg = 1 Torr 1 mmHg = 1.333 x 10^3 dyn/㎠ 1 Torr = 1.333 x 10^3 dyn/㎠ 1 psa = 1 lb/(in^2) 1 psa = 6.8947 x 10^4 dyn/㎠ 1 lb/(in^2) = 6.8947 x 10^4 dyn/㎠ ※ psa : pound per square inch ※ 1inch = 2.54㎝ ※ 1inch^2 = (2.54)^2·㎠