Pressure

Pascal

1 Pa = 1 N/m²

Bar

1 bar = 10 N/cm²
= 100000 Pa

Atmosphere

1 atm = 101325 Pa
≈ 1.033 kgf/cm²

Torr

1 torr = 101325 / 760 Pa
≈ 133.32 Pa

kgf/cm²

1 kgf/cm² = 735.6 mm of Hg