kPa to PSI Conversion Calculator — Kilopascals to Pounds per Square Inch
Convert kilopascals (kPa) to pounds per square inch (psi) for tyre pressures, hydraulic systems, and industrial applications. 1 kPa = 0.14504 psi. Standard atmospheric pressure is 101.325 kPa = 14.696 psi.
kPa
1 kPa = 1000 Pa / 6894.757 Pa per psi ≈ 0.14504 psi
- 1
Convert kPa to Pascals
206.843 × 1,000 = 206,843 - 2
Divide by Pa per psi
206,843 ÷ 6,894.757 = 301 psi = 6,894.757 Pa exactly (pound-force per square inch).
How does this calculator work?
1 kPa = 0.14504 psi = 1000 Pa = 0.01 bar = 0.009869 atm = 7.5006 mmHg. Key references: 100 kPa ≈ 14.50 psi; 101.325 kPa = 14.696 psi = 1 atm; 200 kPa ≈ 29.0 psi (typical car tyre). Multiply kPa by 0.14504 to get psi; multiply psi by 6.895 to get kPa.
Formula
How this is calculated
The pascal (Pa) is the SI pressure unit — 1 Pa = 1 N/m². A kilopascal (kPa) is exactly 1000 Pa. The pound per square inch (psi) is an imperial unit equal to one pound-force (lbf) per square inch. Since 1 lbf = exactly 4.4482216152605 N (from the international pound) and 1 in² = 6.4516 × 10⁻⁴ m² (from the international inch), we get 1 psi = 4.4482216152605 / 0.00064516 ≈ 6894.757 Pa. Dividing 1000 Pa by 6894.757 Pa/psi gives the conversion factor 1 kPa ≈ 0.14504 psi.
For everyday reference: passenger car tyres are typically inflated to 200–250 kPa gauge ≈ 29–36 psi gauge. Road bicycle tyres run 400–700 kPa ≈ 58–102 psi. Industrial hydraulic systems operate at 6,900–34,500 kPa (1,000–5,000 psi). The default of 206.843 kPa ≈ 30 psi is a common recommended car tyre pressure.
Important: psi can denote absolute pressure (psia, measured from a perfect vacuum) or gauge pressure (psig, measured above atmospheric). Tyre pressures are always gauge — a "30 psi" tyre is 30 psi above the ambient 14.696 psia atmospheric pressure, so about 44.7 psia absolute. In kPa, add 101.325 to convert gauge to absolute. Always verify which convention your instrument uses.
Frequently asked questions
200 kPa = 200,000 Pa / 6894.757 Pa per psi ≈ 29.01 psi. This is a typical car tyre pressure (gauge). Quick estimate: multiply kPa by 0.145 to get psi.
psia = absolute pressure from a perfect vacuum. psig = gauge pressure above atmospheric (≈ 14.696 psia). For tyre pressures use psig; for gas cylinders or vacuum work, always check whether the reading is absolute or gauge. kPa pressure converters typically deal with gauge pressure for tyres.
The United States still uses psi for automotive, plumbing, and industrial applications by convention. Most US tyre gauges, compressors, and pressure regulators are graduated in psi. kPa is the global standard and appears on metric tyre placards, so conversion is a frequent real-world need.
Also known as
TG we-Calculate Editorial Team. (2026). kPa to PSI Conversion Calculator — Kilopascals to Pounds per Square Inch [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/kpa-to-psi-conversion-calculator
TG we-Calculate Editorial Team. "kPa to PSI Conversion Calculator — Kilopascals to Pounds per Square Inch." TG we-Calculate. 2026. https://we-calculate.com/calculator/kpa-to-psi-conversion-calculator.
TG we-Calculate Editorial Team, "kPa to PSI Conversion Calculator — Kilopascals to Pounds per Square Inch," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/kpa-to-psi-conversion-calculator
@misc{wecalculate_kpa_to_psi_conversion_calculator, title = {kPa to PSI Conversion Calculator — Kilopascals to Pounds per Square Inch}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/kpa-to-psi-conversion-calculator}}, year = {2026}, note = {TG we-Calculate} }
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