Megapascal will be the mega unit employed to appraise the level of pressure this means force per unit area. The term pascal has become based on the Blaise Pascal. One unit of megapascal is equivalent to 1,000,000 pascal units.

Pound-per-square-inch (abbreviated as PSI) is a unit of pressure, which measures the quantity of pressure per square in . of area. It is described as pressure of the force of 1 pound applied homogeneously above an area of 1 sq inch. Pound or pound force per sq . in . (psi, pfsi, lb/in, or lbf/in) is a commonly used British plus American unit of measurement for pressure. (1 psi = 6,894.76 Pascal).

It is a unit of measuring pressure or it does not take avoirdupois units of measuring stress. It actually refers back to the using one kilo pounds force per one square inch from the surface area. To convert it to metric units, 1 ksi = 6894.757293168 KN/M2 this means that particular Ksi is roughly equals to 6894.76 Kpa. When transformed into standard atmospheres, 1 atm = .014696 ksi. What this means is that one atmosphere is roughly .014696 Ksi.

Convert MPa to ksi here