21 PSI to Bar
21 PSI equals 1.448 bar.
Formula: PSI × 0.0689476 = bar
21 PSI =
1.448bar
kPa
144.79 kPa
MPa
0.145 MPa
atm
1.429 atm
21 PSI is a common turbocharger boost range (gauge pressure). Street-tuned 4-cylinders typically run 10–20 PSI of boost.
Computed to 3 decimal places using factor 0.0689476. For engineering or safety-critical uses verify against a calibrated reference.
Reference table
PSI to bar near 21
| pounds per square inch (PSI) | bar (bar) | kPa | MPa |
|---|---|---|---|
| 13 PSI | 0.896 bar | 89.632 kPa | 0.09 MPa |
| 14 PSI | 0.965 bar | 96.527 kPa | 0.097 MPa |
| 15 PSI | 1.034 bar | 103.421 kPa | 0.103 MPa |
| 16 PSI | 1.103 bar | 110.316 kPa | 0.11 MPa |
| 17 PSI | 1.172 bar | 117.211 kPa | 0.117 MPa |
| 18 PSI | 1.241 bar | 124.106 kPa | 0.124 MPa |
| 19 PSI | 1.31 bar | 131 kPa | 0.131 MPa |
| 20 PSI | 1.379 bar | 137.895 kPa | 0.138 MPa |
| 21 PSI | 1.448 bar | 144.79 kPa | 0.145 MPa |
| 22 PSI | 1.517 bar | 151.685 kPa | 0.152 MPa |
| 23 PSI | 1.586 bar | 158.579 kPa | 0.159 MPa |
| 24 PSI | 1.655 bar | 165.474 kPa | 0.165 MPa |
| 25 PSI | 1.724 bar | 172.369 kPa | 0.172 MPa |
| 26 PSI | 1.793 bar | 179.264 kPa | 0.179 MPa |
| 27 PSI | 1.862 bar | 186.159 kPa | 0.186 MPa |
| 28 PSI | 1.931 bar | 193.053 kPa | 0.193 MPa |
| 29 PSI | 1.999 bar | 199.948 kPa | 0.2 MPa |
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FAQ
Frequently asked
- What is 21 PSI in bar?
- 21 PSI equals 1.448 bar, or 144.8 kPa. Multiply PSI by 0.0689476 to convert.
- How do I convert 21 PSI to bar without a calculator?
- Divide by 14.5 for a quick estimate: 21 ÷ 14.5 ≈ 1.45 bar. The exact answer is 1.448 bar.
- Is 21 PSI a good tire pressure?
- 21 PSI may be outside typical passenger-car range (30–35 PSI). Consult your vehicle's door-jamb sticker.
- What is 21 PSI in kPa?
- 21 PSI = 144.8 kPa. Tire pressures in Canada and Europe are often given in kPa.
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