The pièze (French: [pjɛz]) is the unit of pressure in the metre–tonne–second system of units (mts system), used, e.g., in the former Soviet Union 1933–1955. It is defined as one sthène per square metre. The symbol is pz.[1]

one pièze = 1 kilopascal
= 10 millibars
9.869×10−3 standard atmospheres
7.501 torrs
0.1450 pounds per square inch
0.2953 inches of mercury


  1. ^ François Cardarelli (2003). Encyclopaedia of Scientific Units, Weights and Measures: Their Si Equivalences and Origins (3rd ed.). Springer. p. 724. ISBN 9781852336820.