Need to convert PSI to Kilopascals (psi → kPa)? The converter above delivers instant results. Below: the exact conversion factor, a reference table, real-world examples, and the history of both units — everything you need for accurate psi to kPa conversion.
The History of the PSI
PSI (pounds per square inch) developed naturally from US and British engineering traditions where pounds and inches were the standard units. Steam boiler ratings in the Industrial Revolution were in PSI; modern ASME pressure vessel codes still use PSI for US calculations. Car tire pressure gauges in the US read in PSI (recommended 30–35 PSI for passenger cars); HVAC systems use PSI; water pressure in US homes runs 40–80 PSI at the main.
The History of the Kilopascal
The kilopascal (1,000 Pa) is the practical unit for everyday pressure measurement in metric countries. Weather pressure (barometric) is reported in hPa (hectopascals, = 100 Pa) — standard sea level pressure is 1013.25 hPa = 101.325 kPa. Tire pressure in many metric countries is listed in kPa (typical car tire: 220–250 kPa). Blood pressure cuffs in metric countries display kPa; normal blood pressure (120/80 mmHg) equals approximately 16.0/10.7 kPa.
How to Convert PSI to Kilopascals
Multiply PSI by 6.89476 to get Kilopascals.
kPa = psi × 6.89476Step-by-Step Example
- Start with your value in PSI — for example, 25 psi.
- Multiply: 25 × 6.89476 = 172.369 kPa.
Pro Tip: For quick psi to kPa conversions without arithmetic, bookmark this page. The interactive tool above updates instantly as you type.
PSI to Kilopascal Reference Table
| PSI (psi) | Kilopascal (kPa) |
|---|---|
| 1 | 6.89476 kPa |
| 2 | 13.78952 kPa |
| 5 | 34.4738 kPa |
| 10 | 68.9476 kPa |
| 25 | 172.369 kPa |
| 50 | 344.738 kPa |
| 100 | 689.476 kPa |
Real-World Examples — psi to kPa
- 6.89476 kPa — the equivalent of 1 psi (the smallest reference point)
- 68.9476 kPa — a practical mid-range value (10 psi)
- 689.476 kPa — a common large-quantity reference (100 psi)
Applications of PSI-to-Kilopascal Conversion
The psi to kPa conversion is needed in meteorology, engineering, diving, and pneumatics. Here's where it specifically matters:
- International specifications: Products designed in one unit system must be documented for users who work in the other.
- Scientific and technical work: Research papers and engineering drawings specify pressure in a particular unit — accurate conversion prevents costly errors.
- Education: Physics, chemistry, and applied math curricula require fluency in pressure unit conversion.
- Everyday tasks: Cooking, construction, fitness, and travel all involve pressure conversions when switching between unit systems.
Common Mistakes When Converting PSI to Kilopascal
- Mistake: Forgetting to convert gauge pressure (measured above atmospheric) to absolute pressure
- Mistake: Confusing PSI and kPa — car tire specs differ by country
- Mistake: Using bar when the calculation requires Pascals (1 bar = 100,000 Pa)
Frequently Asked Questions — PSI to Kilopascal
How many Kilopascals are in 1 PSI?
Exactly 6.89476 kPa. The conversion factor is 6.89476 — this is derived from the precise SI definitions of both units.
What is the formula to convert PSI to Kilopascals?
kPa = psi × 6.89476. For example: 5 psi × 6.89476 = 34.4738 kPa.
How do I convert Kilopascals back to PSI?
Divide by 6.89476: psi = kPa ÷ 6.89476. Or multiply by 0.14504.
Why would I convert PSI to Kilopascals?
PSI and Kilopascals are both used in meteorology, engineering, diving, and pneumatics, but different countries and industries prefer different units. Converting between them is necessary when reading foreign specifications, using international recipes, or collaborating across measurement systems.
Is this PSI-to-Kilopascal converter accurate?
Yes — the factor 6.89476 is derived from official SI definitions and international standards. All calculations use full floating-point precision.
What are some real-world examples of psi to kPa conversion?
1 psi = 6.89476 kPa; 10 psi = 68.9476 kPa; 100 psi = 689.476 kPa.
Conclusion
Converting PSI to Kilopascals: multiply by 6.89476; 1 psi = 6.89476 kPa. The converter above handles any value instantly. Refer to the table above for quick reference values, and bookmark this page for fast psi to kPa access.