mPa – Millipascal Pressure Unit Find conversions for the mPa (millipascal) pressure unit. 250 mPa to bar How many bar is 250 millipascal equal to? 250 millipascal is a very small value when converted to bar pressure units: 250 mPa = 0.25 Pa = 0.0000025 bar. Featured pa - pascal based unit range pressure measurement products Pitot tube air flow calculation 1000 hPa differential pressure transmitter 50 kPa negative gauge vacuum transmitter for Milk 5 kPa g range 0-5 Vdc output fuel oil pressure sensor for liquid level measuring use 100 pascals range brick kiln and dryer air pressure logger and sensor