Pressure Converter

Convert between common and industrial pressure units.

Pressure
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Related Conversions
10 inHg to psi 20 inHg to psi 25 inHg to psi 45 inHg to psi 50 inHg to psi 60 inHg to psi 65 inHg to psi 90 inHg to psi 180 inHg to psi 320 inHg to psi 480 inHg to psi 2,000 inHg to psi
Reverse Conversions
10 psi to inHg 30 psi to inHg 32 psi to inHg 40 psi to inHg 45 psi to inHg 90 psi to inHg 150 psi to inHg 180 psi to inHg 320 psi to inHg 480 psi to inHg 500 psi to inHg 4,000 psi to inHg
More Pressure Conversions
1 Torr to Pa 1 atm to kPa 1 atm to psi 1 bar to atm 4 atm to kPa 10 bar to psi 20 bar to psi 30 inHg to kPa 32 psi to kPa 35 psi to bar 101.325 kPa to atm 400 kPa to psi

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Common Benchmarks

Pressure cooker 15 psi
Blood pressure systolic 120 mmHg
Mountain air 70 kPa
Natural gas line 0.25 psi
Car tire 32 psi
Soccer ball 12 psi

Formula

psi = inHg × 0.4911540775

Example

Example: convert 200 inches of mercury to pounds per square inch.

200 inHg = 98.2308155 psi

Conversion table

inches of mercury (inHg) pounds per square inch (psi)
1 inHg 0.49115408 psi
2 inHg 0.98230815 psi
5 inHg 2.45577039 psi
10 inHg 4.91154077 psi
20 inHg 9.82308155 psi
50 inHg 24.55770387 psi
100 inHg 49.11540775 psi

Explanation

These are both units.

How to convert inches of mercury to pounds per square inch

  1. Start with the value in inches of mercury (inHg).
  2. Multiply it by 0.4911540775.
  3. The result is the measurement in pounds per square inch (psi).

Example: 200 inHg → 98.2308155 psi

Frequently Asked Questions

How much is 200 inches of mercury in pounds per square inch?

200 inches of mercury is about 98.2308 pounds per square inch.

How many pounds per square inch is 1 inch of mercury?

1 inch of mercury is about 0.491154 pounds per square inch.

How many inches of mercury is 1 pound per square inch?

1 pound per square inch is about 2.036021 inches of mercury.

What is the difference between inches of mercury and pounds per square inch?

Both measure pressure, but they are commonly used in different contexts. Inches of mercury are used in meteorology and aviation (barometric pressure). Pounds per square inch are often used in engineering and tire pressure, especially in US contexts.

Where are inches of mercury and pounds per square inch used?

In practice: Inches of mercury are used in meteorology and aviation (barometric pressure). Pounds per square inch are often used in engineering and tire pressure, especially in US contexts.

Why does 1 inch of mercury equal 0.491154 pounds per square inch?

Because pressure units are defined with a fixed relationship (often relative to the pascal). To convert, multiply by that factor.