Convert ksi to Kilopascals (ksi to kPa)

Formula

kPa = ksi × 6894.757293168

Derivation from SI units:

• 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa
• 1 kPa = 10³ Pa
• 1 ksi = 6894757.293168 Pa ÷ 1000 Pa per kPa = 6894.757293168 kPa

Both units are defined exactly, so the factor is exact. ksi definition: ksi; Kilopascal definition: kilopascal.

Worked examples

1. A reading of 20 ksi converts to 137895.1459 kPa.
   20 ksi × 6894.757293 = 137895.1459 kPa
2. A value of 65 ksi is 448159.2241 kPa.
   65 ksi × 6894.757293 = 448159.2241 kPa

Where it's used

ksi are used for yield and tensile strength in ASTM and ASME material specifications, while kilopascals appear in tyre pressure outside the United States (about 200–250 kPa for cars). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

ksi to other pressure units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kip per square inch (ksi)".
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.