How to convert bar to kilopascals
One bar equals 100 kilopascals, so multiply the number of bar by 100:
kPa = bar × 100
bar = kPa ÷ 100 (1 kPa = 0.01 bar)
Example: 2.2 bar → 2.2 × 100 = 220 kPa.
Going the other way, divide by 100, or multiply by 0.01; the kilopascals to bar converter does it for you.
Everyday values
| Bar | Kilopascals | For example |
|---|---|---|
| 1 bar | 100 kPa | 1 bar |
| 2.2 bar | 220 kPa | a typical car tyre |
| 2.5 bar | 250 kPa | a loaded car tyre |
| 9 bar | 900 kPa | espresso extraction pressure |
When you need this conversion
One bar is exactly 100 kPa, so multiply by 100. Tyre placards in some countries show kPa, gauges in others show bar or psi.
Bar to kilopascal conversion table
| bar | kPa | bar | kPa |
|---|---|---|---|
| 0.5 bar | 50 kPa | 5.5 bar | 550 kPa |
| 1 bar | 100 kPa | 6 bar | 600 kPa |
| 1.5 bar | 150 kPa | 6.5 bar | 650 kPa |
| 2 bar | 200 kPa | 7 bar | 700 kPa |
| 2.5 bar | 250 kPa | 7.5 bar | 750 kPa |
| 3 bar | 300 kPa | 8 bar | 800 kPa |
| 3.5 bar | 350 kPa | 8.5 bar | 850 kPa |
| 4 bar | 400 kPa | 9 bar | 900 kPa |
| 4.5 bar | 450 kPa | 9.5 bar | 950 kPa |
| 5 bar | 500 kPa | 10 bar | 1,000 kPa |
About the units
- Bar (bar): exactly 100,000 pascals, close to atmospheric pressure at sea level.
- Kilopascal (kPa): 1,000 pascals.
Both are units of pressure. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many kilopascals are in one bar?
One bar is 100 kilopascals. One kilopascal is 0.01 bar.
How do I convert bar to kilopascals?
Multiply the value in bar by 100. To go back, divide by 100.
What is 2.2 bar in kilopascals?
2.2 bar = 220 kPa.
What is 2.5 bar in kilopascals?
2.5 bar = 250 kPa.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.