Kilopascal to PSI Conversion Chart
| Kilopascal (kPa) | Pound per square inch (psi) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 1 kPa | 0.145038 psi | Residential Air Conditioning Airflow Static Resistance | 1 × 0.1450377 = 0.145038 psi |
| 5 kPa | 0.725189 psi | Low-Pressure Natural Gas Residential Utility Manifold | 5 × 0.1450377 = 0.725189 psi |
| 6.894757 kPa | 1 psi | Exact International Imperial One Pound Per Square Inch | 6.894757 × 0.1450377 = 1 psi |
| 10 kPa | 1.450377 psi | Industrial Pneumatic Material Handling Suction Head | 10 × 0.1450377 = 1.450377 psi |
| 20 kPa | 2.900754 psi | Inflatable Raft Collar Hull Operational Working Pressure | 20 × 0.1450377 = 2.900754 psi |
| 50 kPa | 7.251885 psi | Low-Pressure Commercial Steam Heating Circuit Limit | 50 × 0.1450377 = 7.251885 psi |
| 100 kPa | 14.50377 psi | Exact One Bar Metric Reference Pressure in PSI Equivalent | 100 × 0.1450377 = 14.50377 psi |
| 101.325 kPa | 14.69595 psi | Defined Earth Sea Level Atmospheric Standard Pressure | 101.325 × 0.1450377 = 14.69595 psi |
| 150 kPa | 21.75566 psi | Domestic Water System Minimum City Service Delivery | 150 × 0.1450377 = 21.75566 psi |
| 200 kPa | 29.00754 psi | Compact Passenger Vehicle Minimum Cold Tire Inflation | 200 × 0.1450377 = 29.00754 psi |
| 220 kPa | 31.90829 psi | Standard Sedan Recommended Cold Tire Inflation Benchmark | 220 × 0.1450377 = 31.90829 psi |
| 240 kPa | 34.80905 psi | Midsize Crossover SUV Standard Cold Tire Inflation Spec | 240 × 0.1450377 = 34.80905 psi |
| 250 kPa | 36.25943 psi | Full-Size Estate Touring Cold Tire Inflation Spec | 250 × 0.1450377 = 36.25943 psi |
| 300 kPa | 43.51131 psi | Residential Well Water Booster Pump Cut-Off Switch | 300 × 0.1450377 = 43.51131 psi |
| 500 kPa | 72.51885 psi | Commercial Building Fire Standpipe Water Pressure | 500 × 0.1450377 = 72.51885 psi |
Kilopascal to Pound per square inch Formula & Unit Definitions
Under the 1959 International Yard and Pound Treaty and standard gravitational acceleration (9.80665 m/s²), 1 pound per square inch is defined as exactly 6,894.757293 pascals (approximately 6.894757 kPa). Therefore, 1 kilopascal equals 1 ÷ 6.894757293 ≈ 0.1450377377 psi. To convert kilopascals to psi, multiply the kPa value by 0.1450377 (or divide by 6.894757). To reverse psi back to kilopascals, multiply by 6.894757.
Quick Estimation: To approximate psi from kPa quickly in your head, divide the kilopascal value by 7. For example, 210 kPa ÷ 7 ≈ 30 psi (actual is 30.46 psi, accurate within 1.5%).
Kilopascal Standard (kPa)
SI Metric Standard- Creator & Origin: Standardized in 1971 by the CGPM under the decimal SI framework as 1,000 pascals (10³ N/m²).
- Standard Definition: Represents one thousand newtons of force distributed over a one square meter surface (1 kN/m²).
- Everyday Focus: International car tire placards (220-250 kPa), ventilation static pressure, and municipal pipeline grids.
Pound per Square Inch (psi)
US Customary & Imperial- Creator & Origin: Developed during the British Industrial Revolution, tied to the avoirdupois pound and inch standardized by the 1959 treaty.
- Standard Definition: Defined as one avoirdupois pound of force applied over one square inch (1 lbf/in² ≈ 6,894.757 Pa).
- Everyday Focus: US automotive tire gauges (32-35 psi), workshop air compressor tanks (90-120 psi), and residential plumbing.
Frequently Asked Questions
Q.How many psi are in one kilopascal?
One kilopascal equals approximately 0.145038 pounds per square inch (psi).
Q.What is the reverse conversion from psi to kilopascals?
To convert in reverse, use the PSI to Kilopascals Converter where 1 psi equals 6.894757 kPa.
Q.What is 200 kPa in psi?
200 kPa equals approximately 29.01 psi.
Q.What is 250 kPa in psi?
250 kPa equals approximately 36.26 psi.
Q.How do you convert kPa to psi easily without a calculator?
Divide your kPa figure by 7 for a quick estimate within 3% of the exact figure (e.g. 280 kPa ÷ 7 = 40 psi, actual 40.61 psi).