inches of mercury to psi
Convert inch of mercury to pound per square inch — instant, free, with the formula shown.
How to convert inch of mercury to pound per square inch
To convert inch of mercury to pound per square inch, multiply by 0.4911542:
For example, 10 inHg × 0.491154 = 4.911542 psi.
inHg to psi conversion table
| inches of mercury (inHg) | psi (psi) |
|---|---|
| 1 inHg | 0.491154 psi |
| 2 inHg | 0.982308 psi |
| 5 inHg | 2.455771 psi |
| 10 inHg | 4.911542 psi |
| 25 inHg | 12.278855 psi |
| 50 inHg | 24.55771 psi |
| 100 inHg | 49.11542 psi |
| 250 inHg | 122.78855 psi |
| 500 inHg | 245.5771 psi |
| 1000 inHg | 491.1542 psi |
Other inch of mercury conversions
Convert to pound per square inch from another unit
inHg to psi — frequently asked
How many psi are in 1 inch of mercury?
1 inch of mercury = 0.491154 psi (inHg × 0.491154 = psi).
What is the formula to convert inch of mercury to pound per square inch?
Multiply your inch of mercury value by 0.4911542 to get pound per square inch.
How do I convert 10 inches of mercury to psi?
10 inHg = 4.911542 psi. For 100 inHg the answer is 49.11542 psi. Use the calculator on this page for any other value.
When to convert inch of mercury to pound per square inch
Pressure conversion — common questions
What's the difference between bar and psi?
1 bar = 100,000 Pa ≈ 14.504 psi. Bar is metric/SI-friendly; psi is US imperial. Tire pressure in cars is commonly 30–35 psi or ≈ 2.1–2.4 bar.
Is 1 atmosphere the same as 1 bar?
Very close but not identical. 1 atm = 1.01325 bar = 101,325 Pa. 1 bar = 100,000 Pa.
Why is blood pressure in mmHg?
Historically measured with mercury manometers — the pressure that supports a column of mercury that many millimetres tall. 120 mmHg systolic ≈ 16 kPa.