bar
barpressure · International · Modern / historical
1 bar = exactly 100,000 Pa.
Converter
pressure · International · Modern
pascal
Paexact
- Record
- M028
- Definition quality
- Standardized
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Etymology/person-name origin not separately researched unless stated by standards history; current definition/conversion resolved.
Definition
SI derived unit of pressure and stress; 1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻².
History & use
The 14th CGPM adopted the special name pascal, symbol Pa, in 1971.
Modern use
Standard SI unit for pressure and stress.
Did you know?
A pascal is a very small pressure in everyday terms, so kilopascals and megapascals are commonly convenient.
Sources & evidence
Related measurements
pressure · United States · Modern
1 psi = exactly 6894.757293168361 Pa using international lb/in and standard gravity.
pressure · International · Modern
1 atm = 101325 Pa exactly
pressure · Scientific/technical · Modern/historical
1 Torr = (1/760) atm = 101325/760 Pa
pressure · Medical/scientific/technical · Modern
1 mmHg (conventional) = 133.3224 Pa
pressure
1 hPa = 100 Pa; conventional inHg converts using NIST factors.