# Psi to kilopascals converter

> Convert psi to kilopascals (psi to kPa) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/psi-to-kpa
Subject: Unit converters

A pressure marked psi may appear on a tire placard, gauge or component rating. Preserve whether that reading is gauge or absolute pressure when converting. Changing the unit does not remove the atmospheric offset between those pressure references.

One pound per square inch is about 6.8947572932 kilopascals, so 32 psi is 220.632233 kPa. To convert psi to kPa, multiply by 6.8947572932; to convert back, multiply by 0.1450377377.

One psi is one pound-force per square inch, about 6,894.757 pascals. The factor has no exact decimal form, so results are computed with 50 significant digits and rounded only for display.

## Inputs

- **Psi (psi)**

## Results

- Kilopascals (kPa) — main result
- Conversion
- 1 kPa in psi (psi)

## Formula

$$
\text{kilopascals} = \text{psi} \times 6.89475729317
$$

## Worked examples

### 32 psi to kPa

- Psi (psi): 32 psi
- **Kilopascals: 220.632233381 kPa**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 25 psi to kPa

- Psi (psi): 25 psi
- **Kilopascals: 172.368932329 kPa**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 50 psi to kPa

- Psi (psi): 50 psi
- **Kilopascals: 344.737864658 kPa**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### When would I convert psi to kPa?

A pressure marked psi may appear on a tire placard, gauge or component rating. Preserve whether that reading is gauge or absolute pressure when converting. Changing the unit does not remove the atmospheric offset between those pressure references.

### How many kilopascals are in a pound per square inch?

One pound per square inch is about 6.8947572932 kilopascals. One psi is one pound-force per square inch, about 6,894.757 pascals.

### How do you convert psi to kPa?

Multiply the number of psi by 6.8947572932. For example, 32 psi × 6.8947572932 = 220.632233 kPa. To go the other way, divide by 6.8947572932.

### How can I estimate psi to kPa without a calculator?

Multiply by 7. That is 1.5% high of the exact factor 6.8947572932, so 32 psi comes out as 224 kPa instead of 220.6322.

### How accurate is the psi to kilopascals converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “32 psi to kPa” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)