PSI stands for pounds per square inch. MPH stands for miles per hour. psi is used to measure pressure, and mph is used to measure speed. They have no relationship and cannot be converted to one another.
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Formula: psi x 6.895 = kPa
Use this formula: psi x 0.07031 = kg/cm2
Multiply inches of WC by 0.0361 to obtain PSI.
km=1000m
Seconds/3600 = Hours