Convert Millimeters of Mercury to Megapascals
Instantly convert Millimeters of Mercury (mmHg) to Megapascals (MPa) with our free online calculator.
Formula: mmHg to MPa — multiply by 1.3332e-4
Reference Table
| Millimeters of Mercury (mmHg) | Megapascals (MPa) |
|---|---|
| 1 | 0.000133322 |
| 5 | 0.00066661 |
| 10 | 0.00133322 |
| 25 | 0.00333305 |
| 50 | 0.0066661 |
| 100 | 0.0133322 |
How to Convert Millimeters of Mercury to Megapascals
Formula
To convert Millimeters of Mercury (mmHg) to Megapascals (MPa): multiply by 1.3332e-4
Step-by-Step
- Start with your value in Millimeters of Mercury (mmHg).
- Multiply by 1.3332e-4 to perform the conversion.
- The result is your value expressed in Megapascals (MPa).
Conversion Factor
1 mmHg = 0.000133322 MPa
Reverse Factor
1 MPa = 7500.64 mmHg
Worked Example
Convert 25 Millimeters of Mercury to Megapascals: 25 mmHg = 0.00333305 MPa
About Millimeters of Mercury (mmHg)
A unit of pressure historically defined as the pressure exerted by a column of mercury exactly 1 millimeter tall at the standard acceleration of gravity (9.80665 m/s²) and the standard density of mercury (13,595.1 kg/m³ at 0 °C). The mmHg's contemporary definition rounds to exactly 133.322387415 Pa (NIST SP 811). Despite being non-SI, mmHg remains the international clinical standard for blood pressure measurement ("120 over 80" mmHg) per WHO and ESH guidelines, and is the default unit for intraocular pressure in ophthalmology (normal IOP 10-21 mmHg per Glaucoma Research Foundation) and intracranial pressure monitoring in neurology. Numerically the mmHg is almost identical to the torr (1 mmHg ≈ 1.0000007 torr — the difference is whether one uses the conventional density or the experimentally measured density of mercury). Barometric atmospheric pressure was historically quoted in mmHg before kPa/hPa adoption (760 mmHg = 1 atm = 101.325 kPa).
About Megapascal (MPa)
A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. Megapascals are the universal SI unit for material strength reporting in structural and mechanical engineering: concrete compressive strength (typically 20-60 MPa per ACI 318 / Eurocode 2, with ultra-high-performance concrete reaching 150-200 MPa), structural-steel yield stress (250 MPa for S275 / A36, 355 MPa for S355, up to 690 MPa for HSLA grades), aluminum tensile (6061-T6 ~310 MPa), and the fracture toughness of ceramics and polymers reported as MPa·m^½ in materials databases. Mechanical-engineering finite-element solvers (Abaqus, ANSYS, Nastran), pressure-vessel codes (ASME BPVC Section VIII, PD 5500, EN 13445), hydraulic system specifications above ~70 bar, and the civil-engineering concrete mix specs all use MPa as the working pressure/stress unit. Common conversions: 1 MPa = 10 bar = 145.04 psi = 9.869 atm.
Quick Facts
- 1 Millimeters of Mercury equals 0.000133322 Megapascals
- 1 Megapascal equals 7500.64 Millimeters of Mercury
- Millimeters of Mercury is a unit of pressure
- Megapascal is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Millimeters of Mercury belongs to the metric system
Common Millimeters of Mercury to Megapascal Conversions
| Millimeters of Mercury (mmHg) | Megapascals (MPa) |
|---|---|
| 0.1 | 0.0000133322 |
| 0.5 | 0.000066661 |
| 1 | 0.000133322 |
| 2 | 0.000266644 |
| 5 | 0.00066661 |
| 10 | 0.00133322 |
| 14.696 | 0.0019593 |
| 15 | 0.00199983 |
| 20 | 0.00266644 |
| 25 | 0.00333305 |
| 50 | 0.0066661 |
| 100 | 0.0133322 |
| 150 | 0.0199983 |
| 200 | 0.0266644 |
| 500 | 0.066661 |
| 1000 | 0.133322 |
Understanding Millimeters of Mercury
The Millimeters of Mercury (symbol: mmHg) is a unit of pressure. A unit of pressure historically defined as the pressure exerted by a column of mercury exactly 1 millimeter tall at the standard acceleration of gravity (9.80665 m/s²) and the standard density of mercury (13,595.1 kg/m³ at 0 °C). The mmHg's contemporary definition rounds to exactly 133.322387415 Pa (NIST SP 811). Despite being non-SI, mmHg remains the international clinical standard for blood pressure measurement ("120 over 80" mmHg) per WHO and ESH guidelines, and is the default unit for intraocular pressure in ophthalmology (normal IOP 10-21 mmHg per Glaucoma Research Foundation) and intracranial pressure monitoring in neurology. Numerically the mmHg is almost identical to the torr (1 mmHg ≈ 1.0000007 torr — the difference is whether one uses the conventional density or the experimentally measured density of mercury). Barometric atmospheric pressure was historically quoted in mmHg before kPa/hPa adoption (760 mmHg = 1 atm = 101.325 kPa).
It belongs to the metric measurement system.
Millimeters of Mercury are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Understanding Megapascals
The Megapascal (symbol: MPa) is a unit of pressure. A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. Megapascals are the universal SI unit for material strength reporting in structural and mechanical engineering: concrete compressive strength (typically 20-60 MPa per ACI 318 / Eurocode 2, with ultra-high-performance concrete reaching 150-200 MPa), structural-steel yield stress (250 MPa for S275 / A36, 355 MPa for S355, up to 690 MPa for HSLA grades), aluminum tensile (6061-T6 ~310 MPa), and the fracture toughness of ceramics and polymers reported as MPa·m^½ in materials databases. Mechanical-engineering finite-element solvers (Abaqus, ANSYS, Nastran), pressure-vessel codes (ASME BPVC Section VIII, PD 5500, EN 13445), hydraulic system specifications above ~70 bar, and the civil-engineering concrete mix specs all use MPa as the working pressure/stress unit. Common conversions: 1 MPa = 10 bar = 145.04 psi = 9.869 atm.
It belongs to the metric measurement system.
Megapascals are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Millimeters of Mercury to Megapascals?
Engineers, mechanics, and scientists frequently need to convert pressure between Millimeters of Mercury and Megapascals when working with different measurement standards. Tire pressure, blood pressure readings, weather barometric measurements, and industrial process specifications may all use different pressure units depending on the region or discipline. Reliable conversion prevents equipment misuse and ensures safety.
Frequently Asked Questions
How do I convert Millimeters of Mercury to Megapascals?
A unit of pressure historically defined as the pressure exerted by a column of mercury exactly 1 millimeter tall at the standard acceleration of gravity (9. To convert Millimeters of Mercury to Megapascals, multiply by 1.3332e-4. For example, 25 mmHg equals 0.00333305 MPa.
How many Megapascals are in 1 Millimeters of Mercury?
There are 0.000133322 Megapascals in 1 Millimeters of Mercury.
How many Millimeters of Mercury are in 1 Megapascal?
There are 7500.64 Millimeters of Mercury in 1 Megapascal.
What is the formula for Millimeters of Mercury to Megapascal conversion?
The formula is: multiply by 1.3332e-4. This means 1 mmHg = 0.000133322 MPa.
Is a Millimeters of Mercury bigger than a Megapascal?
Yes. One Millimeters of Mercury is larger than one Megapascal because 1 mmHg equals 0.000133322 MPa, which is less than 1.
When do you need to convert between Millimeters of Mercury and Megapascals?
A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. Millimeters of Mercury and Megapascal are both pressure units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.