Convert Megapascals to Inches of Mercury
Instantly convert Megapascals (MPa) to Inches of Mercury (inHg) with our free online calculator.
Formula: MPa to inHg — multiply by 295.3
Reference Table
| Megapascals (MPa) | Inches of Mercury (inHg) |
|---|---|
| 1 | 295.3 |
| 5 | 1476.5 |
| 10 | 2953 |
| 25 | 7382.49 |
| 50 | 14765 |
| 100 | 29530 |
How to Convert Megapascals to Inches of Mercury
Formula
To convert Megapascals (MPa) to Inches of Mercury (inHg): multiply by 295.3
Step-by-Step
- Start with your value in Megapascals (MPa).
- Multiply by 295.3 to perform the conversion.
- The result is your value expressed in Inches of Mercury (inHg).
Conversion Factor
1 MPa = 295.3 inHg
Reverse Factor
1 inHg = 0.00338639 MPa
Worked Example
Convert 25 Megapascals to Inches of Mercury: 25 MPa = 7382.49 inHg
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.
About Inch of Mercury (inHg)
A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386.389 Pa per NIST SP 811). Inches of mercury are the primary unit in US aviation for altimeter settings (the QNH datum is reported in inHg in METAR weather observations — "Altimeter 30.12 inHg" means 30.12 inHg corrected to mean sea level), US barometric weather reporting on consumer indoor weather stations and TV weather graphics, HVAC and refrigeration duct/return static pressure (often quoted as fractions of an inHg, e.g., 0.25 inHg = ~62 Pa), and some legacy automotive vacuum gauges measuring intake-manifold vacuum below atmospheric (a healthy engine reads ~18-22 inHg of vacuum at idle). Standard sea-level atmospheric pressure is 29.92 inHg = 1013.25 hPa = 101.325 kPa.
Quick Facts
- 1 Megapascal equals 295.3 Inches of Mercury
- 1 Inch of Mercury equals 0.00338639 Megapascals
- Megapascal is a unit of pressure
- Inch of Mercury is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Megapascal belongs to the metric system
- The Inch of Mercury belongs to the imperial system
Common Megapascal to Inch of Mercury Conversions
| Megapascals (MPa) | Inches of Mercury (inHg) |
|---|---|
| 0.1 | 29.53 |
| 0.5 | 147.65 |
| 1 | 295.3 |
| 2 | 590.599 |
| 5 | 1476.5 |
| 10 | 2953 |
| 14.696 | 4339.72 |
| 15 | 4429.5 |
| 20 | 5905.99 |
| 25 | 7382.49 |
| 50 | 14765 |
| 100 | 29530 |
| 150 | 44295 |
| 200 | 59059.9 |
| 500 | 147650 |
| 1000 | 295300 |
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.
Understanding Inches of Mercury
The Inch of Mercury (symbol: inHg) is a unit of pressure. A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386.389 Pa per NIST SP 811). Inches of mercury are the primary unit in US aviation for altimeter settings (the QNH datum is reported in inHg in METAR weather observations — "Altimeter 30.12 inHg" means 30.12 inHg corrected to mean sea level), US barometric weather reporting on consumer indoor weather stations and TV weather graphics, HVAC and refrigeration duct/return static pressure (often quoted as fractions of an inHg, e.g., 0.25 inHg = ~62 Pa), and some legacy automotive vacuum gauges measuring intake-manifold vacuum below atmospheric (a healthy engine reads ~18-22 inHg of vacuum at idle). Standard sea-level atmospheric pressure is 29.92 inHg = 1013.25 hPa = 101.325 kPa.
It belongs to the imperial measurement system.
Inches of Mercury are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Megapascals to Inches of Mercury?
Engineers, mechanics, and scientists frequently need to convert pressure between Megapascals and Inches of Mercury 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 Megapascals to Inches of Mercury?
A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. To convert Megapascals to Inches of Mercury, multiply by 295.3. For example, 25 MPa equals 7382.49 inHg.
How many Inches of Mercury are in 1 Megapascal?
There are 295.3 Inches of Mercury in 1 Megapascal.
How many Megapascals are in 1 Inch of Mercury?
There are 0.00338639 Megapascals in 1 Inch of Mercury.
What is the formula for Megapascal to Inch of Mercury conversion?
The formula is: multiply by 295.3. This means 1 MPa = 295.3 inHg.
Is a Megapascal bigger than a Inch of Mercury?
No. One Megapascal is smaller than one Inch of Mercury because 1 MPa equals 295.3 inHg, which is greater than 1.
When do you need to convert between Megapascals and Inches of Mercury?
A pressure unit defined as the pressure exerted by a 1-inch column of mercury at the standard density of mercury (0 °C) and the standard acceleration of gravity (≈ 3,386. Megapascal and Inch of Mercury 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.