Pressure
psi to mmHg Converter
1 psi = 51.7149 mmHg. Enter any value and the result updates instantly.
Convert
Accuracy and rounding
For pressure readings that compare tire, pump, and mercury-column units.
Pressure factors are fixed, but real-world readings may be gauge pressure or absolute pressure depending on the instrument.
For tires and pumps, match the gauge precision. For engineering specs, keep enough decimals to avoid tolerance drift.
How to convert psi to mmHg
- Type the psi value in the calculator.
- Keep psi selected as the from unit and mmHg selected as the to unit.
- Use the instant result, or copy it with the copy button.
psi to mmHg chart
| psi | mmHg |
|---|---|
| 1 psi | 51.7149 mmHg |
| 2 psi | 103.43 mmHg |
| 5 psi | 258.57 mmHg |
| 10 psi | 517.15 mmHg |
| 25 psi | 1,292.87 mmHg |
| 50 psi | 2,585.75 mmHg |
| 100 psi | 5,171.49 mmHg |
Formula
mmHg = psi x 51.714925203869
Example: 1 psi = 51.7149 mmHg.
Source
Pressure units derived from pascal relationships and fixed conventional factors.
Common questions
How do I convert psi to mmHg?
Enter the psi value in the converter, or multiply by the factor shown in the formula. 1 psi = 51.7149 mmHg.
What should I watch out for?
Check whether the original value is gauge pressure or absolute pressure before comparing readings.
Where does this pressure conversion come from?
Pressure units derived from pascal relationships and fixed conventional factors. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.