UnitCloud is a calculation aid. Standards, contracts, medical decisions, engineering approvals and official requirements need original sources.
Unit console
Convertir des unités avec formule, contexte et précision
UnitCloud est un laboratoire de mesure local pour le quotidien, la technique, l'informatique, l'énergie, la mobilité et le design.
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Unit family
Pression
bar, psi and atm appear in different fields. Tyre, weather and lab values need context.
| Unit | Symbol | Formule |
|---|---|---|
| Pascal | Pa | base |
| Kilopascal | kPa | 1 kPa = 1000 Pa |
| Megapascal | MPa | 1 MPa = 1,000,000 Pa |
| bar | bar | 1 bar = 100,000 Pa |
| Millibar | mbar | 1 mbar = 100 Pa |
| psi | psi | 1 psi ≈ 6894.757 Pa |
| Atmosphere | atm | 1 atm = 101,325 Pa |
| Torr | Torr | 1 Torr ≈ 133.322 Pa |
bar, psi and atm appear in different fields. Tyre, weather and lab values need context.
Sources
Search and practice paths
Search and practice paths
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Factors come from the stored source family and are not derived from rounded display values.
UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
Do not use as the sole basis for official, medical, safety-critical or contractual decisions.
Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Pression. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.8.
Common questions
Which base unit does Pression use?
UnitCloud normalises this family through Pa. That keeps tables, direct conversions and batch output consistent.
What is the most common mistake for Pression?
bar, psi and atm appear in different fields. Tyre, weather and lab values need context.
How does UnitCloud round?
UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.
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