pascal
Papressure · International · Modern
SI derived unit of pressure and stress; 1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻².
Converter
pressure · United States · Modern
pound per square inch (psi)
psiexact
- Record
- M490
- Definition quality
- Standardized
- Conversion mode
- multiplicative
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- Fully calculable
Definition
1 psi = exactly 6894.757293168361 Pa using international lb/in and standard gravity.
Reference value
One pound per square inch (psi) is exactly 6,894.757293168361 pascals.
History & use
Common U.S. pressure unit.
Modern use
Still in current use in United States. Beyond that, modern use is context-dependent and varies by region and measurement system.
Did you know?
NIST rounds to 6894.757 Pa.
Sources & evidence
Related measurements
bar
barpressure · International · Modern / historical
1 bar = exactly 100,000 Pa.
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.