MMHG to PSI Converter: Convert mmHg to Pounds per Square Inch
Use this simple tool to convert pressure from millimeters of mercury (mmHg) to pounds per square inch (psi). Ideal for medical, scientific, and industrial applications.
Understanding the Conversion from mmHg to PSI
Millimeters of mercury (mmHg) and pounds per square inch (psi) are both units of pressure, but they belong to different measurement systems. mmHg is a traditional unit used in medical and scientific settings, while psi is commonly used in industrial and engineering applications in the United States. Converting between the two ensures consistent understanding and compatibility across disciplines and devices.
What Is mmHg?
mmHg stands for millimeters of mercury. It is based on the pressure exerted by a column of mercury 1 millimeter high. Historically, it originated in barometric pressure measurement and remains prevalent in medicine (e.g., blood pressure readings), vacuum technology, and certain scientific contexts.
What Is PSI?
PSI stands for pounds per square inch. It is a unit from the imperial system used to quantify pressure based on force over area. Widely used in the United States, psi measures air pressure in tires, hydraulic systems, and many industrial applications.
Conversion Formula
PSI = mmHg × 0.0193368
Example: 760 mmHg × 0.0193368 = 14.70 psiMMHG to PSI Conversion Table
| Millimeters of Mercury (mmHg) | Pounds per Square Inch (psi) |
|---|---|
| 50 | 0.97 |
| 100 | 1.93 |
| 200 | 3.87 |
| 400 | 7.73 |
| 760 | 14.70 |
| 1000 | 19.34 |
Why Convert mmHg to PSI?
- Medical Applications: Blood pressure monitors often use mmHg, while psi may be required for data conversion in international reports.
- Vacuum Systems: Pressure values in vacuum environments may be given in mmHg but require psi for compatibility with US-based machinery.
- Engineering Crossovers: Engineering teams often need to convert readings from lab equipment (in mmHg) to psi for machine settings or specifications.
- Global Standardization: Scientific papers or equipment manuals may require units in psi depending on the region or industry.
mmHg vs PSI Comparison
| Attribute | mmHg | psi |
|---|---|---|
| System | Traditional/Metric | Imperial |
| Based On | Height of mercury column | Force per square inch |
| Use Cases | Medical, vacuum, science | Industry, hydraulics, tires |
| Conversion | 1 mmHg = 0.0193368 psi | 1 psi = 51.715 mmHg |
FAQ: mmHg to psi
How many psi is 760 mmHg?
760 mmHg equals approximately 14.70 psi, which is standard atmospheric pressure.
What is the formula to convert mmHg to psi?
Multiply mmHg by 0.0193368.
Is mmHg still used today?
Yes, particularly in medicine (e.g., blood pressure), vacuum technology, and some scientific research.
Is this conversion temperature dependent?
No. The standard conversion factor assumes normal temperature and pressure (NTP) conditions and is constant.
Use Cases for mmHg to PSI Conversion
- Blood pressure to engineering unit translation for medical device development
- Vacuum pump calibration across global standards
- International scientific collaboration using different units
- Industrial design review when specifications involve both metric and imperial standards
Conclusion
Understanding how to convert millimeters of mercury (mmHg) to pounds per square inch (psi) allows professionals to bridge the gap between scientific and engineering practices. Whether you are working in medicine, vacuum technology, or engineering, this tool makes pressure unit conversions simple and reliable. With accurate formulas and instant results, you'll ensure your measurements are always compatible and correctly interpreted.