Convert Millimeters of Mercury to Gigapascals
Instantly convert Millimeters of Mercury (mmHg) to Gigapascals (GPa) with our free online calculator.
Formula: mmHg to GPa — multiply by 1.3332e-7
Reference Table
| Millimeters of Mercury (mmHg) | Gigapascals (GPa) |
|---|---|
| 1 | 1.333220e-7 |
| 5 | 6.666100e-7 |
| 10 | 0.00000133322 |
| 25 | 0.00000333305 |
| 50 | 0.0000066661 |
| 100 | 0.0000133322 |
How to Convert Millimeters of Mercury to Gigapascals
Formula
To convert Millimeters of Mercury (mmHg) to Gigapascals (GPa): multiply by 1.3332e-7
Step-by-Step
- Start with your value in Millimeters of Mercury (mmHg).
- Multiply by 1.3332e-7 to perform the conversion.
- The result is your value expressed in Gigapascals (GPa).
Conversion Factor
1 mmHg = 1.333220e-7 GPa
Reverse Factor
1 GPa = 7500640 mmHg
Worked Example
Convert 25 Millimeters of Mercury to Gigapascals: 25 mmHg = 0.00000333305 GPa
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 Gigapascal (GPa)
A metric unit of pressure equal to exactly 1,000,000,000 pascals (1,000 MPa). Gigapascals are the standard unit for reporting elastic-modulus and material-stiffness properties — Young's modulus of structural steel is ~200-210 GPa, aluminum alloys ~69-72 GPa, titanium ~110 GPa, concrete ~25-35 GPa, single-crystal diamond ~1,050-1,200 GPa, and CFRP composite ~150-230 GPa (longitudinal). MatWeb, NIST's MMP database, and the ASM Handbook tabulate elastic constants in GPa. GPa is also the working unit for ultra-high-pressure scientific experiments: diamond-anvil cell measurements (currently extending past 1,000 GPa = 1 TPa for studies of metallic hydrogen and Earth-core conditions), shock-wave equation-of-state research at national labs (LANL, LLNL, Sandia), and geophysics interior models — Earth's outer core lies between roughly 135 and 330 GPa. 1 GPa = 10,000 bar = 145,038 psi.
Quick Facts
- 1 Millimeters of Mercury equals 1.333220e-7 Gigapascals
- 1 Gigapascal equals 7500640 Millimeters of Mercury
- Millimeters of Mercury is a unit of pressure
- Gigapascal 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 Gigapascal Conversions
| Millimeters of Mercury (mmHg) | Gigapascals (GPa) |
|---|---|
| 0.1 | 1.333220e-8 |
| 0.5 | 6.666100e-8 |
| 1 | 1.333220e-7 |
| 2 | 2.666440e-7 |
| 5 | 6.666100e-7 |
| 10 | 0.00000133322 |
| 14.696 | 0.0000019593 |
| 15 | 0.00000199983 |
| 20 | 0.00000266644 |
| 25 | 0.00000333305 |
| 50 | 0.0000066661 |
| 100 | 0.0000133322 |
| 150 | 0.0000199983 |
| 200 | 0.0000266644 |
| 500 | 0.000066661 |
| 1000 | 0.000133322 |
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 Gigapascals
The Gigapascal (symbol: GPa) is a unit of pressure. A metric unit of pressure equal to exactly 1,000,000,000 pascals (1,000 MPa). Gigapascals are the standard unit for reporting elastic-modulus and material-stiffness properties — Young's modulus of structural steel is ~200-210 GPa, aluminum alloys ~69-72 GPa, titanium ~110 GPa, concrete ~25-35 GPa, single-crystal diamond ~1,050-1,200 GPa, and CFRP composite ~150-230 GPa (longitudinal). MatWeb, NIST's MMP database, and the ASM Handbook tabulate elastic constants in GPa. GPa is also the working unit for ultra-high-pressure scientific experiments: diamond-anvil cell measurements (currently extending past 1,000 GPa = 1 TPa for studies of metallic hydrogen and Earth-core conditions), shock-wave equation-of-state research at national labs (LANL, LLNL, Sandia), and geophysics interior models — Earth's outer core lies between roughly 135 and 330 GPa. 1 GPa = 10,000 bar = 145,038 psi.
It belongs to the metric measurement system.
Gigapascals are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Millimeters of Mercury to Gigapascals?
Engineers, mechanics, and scientists frequently need to convert pressure between Millimeters of Mercury and Gigapascals 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 Gigapascals?
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 Gigapascals, multiply by 1.3332e-7. For example, 25 mmHg equals 0.00000333305 GPa.
How many Gigapascals are in 1 Millimeters of Mercury?
There are 1.333220e-7 Gigapascals in 1 Millimeters of Mercury.
How many Millimeters of Mercury are in 1 Gigapascal?
There are 7500640 Millimeters of Mercury in 1 Gigapascal.
What is the formula for Millimeters of Mercury to Gigapascal conversion?
The formula is: multiply by 1.3332e-7. This means 1 mmHg = 1.333220e-7 GPa.
Is a Millimeters of Mercury bigger than a Gigapascal?
Yes. One Millimeters of Mercury is larger than one Gigapascal because 1 mmHg equals 1.333220e-7 GPa, which is less than 1.
When do you need to convert between Millimeters of Mercury and Gigapascals?
A metric unit of pressure equal to exactly 1,000,000,000 pascals (1,000 MPa). Millimeters of Mercury and Gigapascal 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.