The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference or standard pressure.
kilopascals
The kilopascal is a multiple of the unit bit for Pressure. The prefix kilo (symbol k) is defined in the International System of Units (SI) as a multiplier of 10 × 102 (1 thousand, short scale), and therefore 1 kilopascal = 10 × 102 pascals = 1000 pascals. The kilopascal has the unit symbol kPa.