The nanopascal is a multiple of the unit bit for Pressure. The prefix nano (symbol n) is defined in the International System of Units (SI) as a multiplier of 1.0 × 10-9 (1 billionth, short scale), and therefore 1 nanopascal = 1.0 × 10-9 pascals = 0.000000001 pascals. The nanopascal has the unit symbol nPa.
torrs
The torr (symbol: Torr) is a unit of pressure based on an absolute scale, now defined as exactly 1/760 of a standard atmosphere. Thus one torr is exactly 101325/760 pascals (~133.3 Pa).