PSI to kPa

Pounds per square inch (psi) to kilopascals (kPa).

Value

Convert to

241.317kPa

Precision (significant figures)

Formula

kPa = psi × 6.89476

1 psi = 6.89476 kPa

kPa = psi × 6.89476. So 32 psi is 220.632 kPa, 35 psi is 241.317 kPa and 44 psi, a common maximum on tire sidewalls, is 303.369 kPa. Multiply by about 7 for a quick estimate.

Formula

Worked example

Start with 35 psi.
Multiply by 6.89476 (kPa per psi): 35 × 6.89476 = 241.317 kPa.

Psi to kpa chart

Pounds per square inch (psi)	Kilopascals (kPa)
1	6.89476
5	34.4738
10	68.9476
14.7	101.353
20	137.895
25	172.369
30	206.843
32	220.632
35	241.317
40	275.79
50	344.738
60	413.685
80	551.581
100	689.476
150	1,034.21
200	1,378.95

When you need this conversion

Setting tires with a metric gauge, reading SI engineering documents, and converting compressor or pump specs.

Quick reference

1 psi = 6.89476 kPa
30 psi = 206.843 kPa
32 psi = 220.632 kPa
35 psi = 241.317 kPa
44 psi = 303.369 kPa
100 psi = 689.476 kPa

Engineering units

In SI documents, 1 MPa is 1,000 kPa (145.038 psi) and 1 N/mm² equals 1 MPa. Material strengths are usually given in MPa.

Common mistakes

Multiplying by 7. It overstates by about 1.5%. Fine at the pump, not in specs.

Using the sidewall maximum. Inflate to the vehicle placard, not the tire’s maximum rating.

For the reverse, use kPa to psi.

Questions

How many kPa is 32 psi?

220.632 kPa.

How many kPa is 1 psi?

6.89476 kPa.

How many kPa is 100 psi?

689.476 kPa.

How many kPa is atmospheric pressure?

101.325 kPa (14.696 psi).

Sources

Last reviewed 2026-09-24. How we check values · Report a problem with this page