Psi to Mmhg Converter
Convert pound per square inch to millimetre of mercury instantly. Type a value below — the result updates as you type.
When you need to convert pound per square inch to millimetre of mercury
Pressure conversions are used for tyre inflation, weather readings, scuba and industrial gauges, and HVAC work, where gauges and manuals may be calibrated in different units.
Typical values: 0.5 psi is about 25.8575 mmHg, and 100 psi works out to roughly 5171.49 mmHg. Because the ratio is fixed at 51.7149, you can scale any amount linearly — doubling the psi doubles the mmHg.
A single tyre or gauge spec is often printed in two or three pressure units side by side for international use.
How to convert pound per square inch to millimetre of mercury
One pound per square inch equals 51.7149 mmHg. To convert, multiply the number of psi by 51.7149:
mmHg = psi × 51.7149
For example, 10 psi × 51.7149 = 517.1493 mmHg.
Psi to mmHg conversion table
| Pressure (psi) | Mmhg (mmHg) |
|---|---|
| 1 psi | 51.7149 mmHg |
| 2 psi | 103.4299 mmHg |
| 3 psi | 155.1448 mmHg |
| 5 psi | 258.5746 mmHg |
| 10 psi | 517.1493 mmHg |
| 20 psi | 1034.3 mmHg |
| 50 psi | 2585.75 mmHg |
| 100 psi | 5171.49 mmHg |
FAQ
How many mmHg are in a pound per square inch?
One pound per square inch = 51.7149 mmHg.
How do I convert mmHg back to psi?
Divide by 51.7149, or use the mmHg to psi converter.