Megapascal to Millibar Converter
Convert megapascals to millibars with our free online pressure converter.
Quick Answer
1 Megapascal = 10000 millibars
Formula: Megapascal × conversion factor = Millibar
Use the calculator below for instant, accurate conversions.
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Megapascal to Millibar Calculator
How to Use the Megapascal to Millibar Calculator:
- Enter the value you want to convert in the 'From' field (Megapascal).
- The converted value in Millibar will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Pressure category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Megapascal to Millibar: Step-by-Step Guide
Converting Megapascal to Millibar involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
mbar = MPa × 10000Example Calculation:
1 MPa = 10000 mbar
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
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Need to convert to other pressure units?
View all Pressure conversions →What is a Megapascal and a Millibar?
1 MPa = 1,000,000 Pa = 1,000 kPa = 145.038 PSI = 10 bar = 9.869 atm
Why Megapascal?
MPa is the "sweet spot" for engineering pressures:
- Pascal is too small: 1 Pa = barely measurable (atmospheric is 101,325 Pa)
- Kilopascal is too granular: Engineering specs in kPa are 4-5 digit numbers (20,000 kPa for concrete)
- MPa is optimal: Concrete 20-40 MPa (simple, memorable)
- Engineering standard: All material specs given in MPa
- SI-derived: ISO and international standards use MPa
1 mbar = 100 Pa = 1 hPa (exactly) = 0.001 bar = 0.0145 PSI = 0.75 mmHg = 0.000987 atm
Key relationship: 1 mbar = 1 hPa (exact equivalence)
Note: The Megapascal is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Millibar belongs to the imperial/US customary system.
Common Uses and Applications: megapascals vs millibars
Explore the typical applications for both Megapascal (imperial/US) and Millibar (imperial/US) to understand their common contexts.
Common Uses for megapascals
Materials Engineering: Tensile strength, compressive strength, yield strength - THE standard unit for all material properties. Hydraulics: High-pressure hydraulic systems (construction, manufacturing, heavy equipment). Pressure Vessels: Gas cylinders, boilers, reactors, automotive fuel systems. Geotechnical: Soil bearing capacity, rock strength, foundation design. Aerospace: Structural requirements, component ratings.
Material Strengths (Compressive/Tensile)
Understanding material strength is critical for engineering design:
| Material | Type | Strength (MPa) | Notes | |---|---|---|---| | Styrofoam | Compression | 0.01-0.1 | Very weak, insulation only | | Wood (softwood) | Compression | 20-40 | Pine, spruce, fir typical | | Wood (hardwood) | Compression | 40-60 | Oak, maple stronger | | Brick | Compression | 10-40 | Varies by firing temperature | | Concrete (standard) | Compression | 20-40 | Common 28-day strength | | Concrete (high-strength) | Compression | 50-100 | Pre-stressed applications | | Granite | Compression | 100-250 | Very strong, suitable for columns | | Aluminum alloy (6061) | Tensile | 200-300 | Common structural aluminum | | Aluminum alloy (7075) | Tensile | 500-600 | High-strength aerospace | | Steel (structural ASTM A36) | Yield | 250 | Common building steel | | Steel (high-strength ASTM A572) | Yield | 345-450 | Bridge, crane applications | | Steel (ultra-high) | Tensile | 500-1,000 | Special applications | | Steel cable (wire rope) | Tensile | 1,600-2,000 | Elevators, suspension bridges | | Carbon fiber composite | Tensile | 3,000-7,000 | Aerospace, racing | | Kevlar fiber | Tensile | 3,600-3,800 | Armor, protective gear |
Design factor: Actual working stress = material strength ÷ safety factor (typically 2-4)
Hydraulic Systems (High Pressure)
Hydraulic pressure ratings define system capability:
| System Type | Operating Pressure | Peak Pressure | PSI Equivalent | Application | |---|---|---|---|---| | Automotive brake | 10-15 MPa | 20 MPa | 1,500-2,900 PSI | Car braking force | | Automobile power steering | 10-15 MPa | 20 MPa | 1,500-2,900 PSI | Steering assist | | Construction excavator | 20-35 MPa | 40 MPa | 2,900-5,800 PSI | Digging bucket | | Backhoe | 25-30 MPa | 35 MPa | 3,625-5,075 PSI | Heavy lifting | | Dump truck bed | 20-25 MPa | 30 MPa | 2,900-4,350 PSI | Lifting load | | Industrial press | 20-40 MPa | 50 MPa | 2,900-7,250 PSI | Metal forming | | Hydraulic jack | 50-70 MPa | 80 MPa | 7,250-11,600 PSI | Lifting capability | | Water jet cutter | 200-400 MPa | 450 MPa | 29,000-65,000 PSI | Material cutting | | Oil well pump | 100-200 MPa | 250 MPa | 14,500-36,250 PSI | Deep well pressure |
Pressure Vessels & Storage
Pressure ratings determine safe working limits:
| Vessel Type | Typical Pressure | Material | Working PSIG | |---|---|---|---| | Compressed air tank | 0.8-1.0 MPa | Steel | 116-145 PSI | | Propane BBQ tank | 1.5-2.0 MPa | Steel | 218-290 PSI | | Scuba tank (full) | 20-30 MPa | Aluminum/Steel | 3,000-4,350 PSI | | Natural gas vehicle | 20-25 MPa | Composite | 3,000-3,625 PSI | | Hydrogen fuel cell | 35-70 MPa | Carbon fiber | 5,000-10,000 PSI | | Industrial gas cylinder | 15-20 MPa | Steel | 2,175-2,900 PSI | | Medical oxygen | 13.8-15 MPa | Aluminum | 2,000-2,175 PSI | | Nitrogen (instrument) | 10-13.8 MPa | Steel | 1,450-2,000 PSI |
Safety factor: Pressure vessels typically designed with 4:1 to 6:1 safety margin
Geotechnical Engineering (Soil/Rock)
Foundation and excavation design based on pressure ratings:
| Material/Condition | Bearing Capacity | Suitable For | Notes | |---|---|---|---| | Soft clay | 0.05-0.2 MPa | Temporary structures | High settlement risk | | Medium clay | 0.1-0.3 MPa | Single story | Careful design needed | | Stiff clay | 0.3-0.5 MPa | Multi-story buildings | Good load capacity | | Dense sand | 0.3-0.6 MPa | Foundation base | Excellent for building | | Gravel/sand mixture | 0.6-1.0 MPa | Heavy structures | Very good bearing | | Soft rock (shale) | 1-10 MPa | Bridge supports | Rock analysis needed | | Medium rock | 10-50 MPa | Tall buildings | High capacity | | Hard rock (granite) | 50-100+ MPa | Largest structures | Excellent foundation |
Design process: Site investigation → soil tests → pressure capacity → foundation design
When to Use millibars
Aviation: Altimeter settings (pilots say "1015 millibars"). Maritime: Marine weather forecasts, ship barometers. Meteorology: Historical weather data (pre-1980s). Diving: Depth pressure calculations (sometimes).
Additional Unit Information
About Megapascal (MPa)
How do I convert MPa to PSI?
Formula: PSI = MPa × 145.038
Examples:
- 1 MPa = 145 PSI
- 10 MPa = 1,450 PSI (car brakes)
- 20 MPa = 2,900 PSI (hydraulic tools)
- 30 MPa = 4,350 PSI (scuba tank)
- 70 MPa = 10,153 PSI (H2 fuel tank)
What is concrete strength in MPa?
Residential concrete: 20-32 MPa (2,900-4,650 PSI)
- Footings/slabs: 20-25 MPa
- Foundation walls: 25-30 MPa
- Driveway: 25-32 MPa
Commercial concrete: 30-50 MPa
- Floors: 30-35 MPa
- Beams/columns: 35-50 MPa
High-strength: 50-100+ MPa
- High-rise buildings: 50-80 MPa
- Bridges: 60-100 MPa
- Special applications: 100-150 MPa
Conversion: Divide PSI by 145 to get MPa (e.g., 3,000 PSI ≈ 21 MPa)
How do I convert MPa to bar?
Formula: bar = MPa × 10
Examples:
- 0.1 MPa = 1 bar
- 1 MPa = 10 bar
- 2 MPa = 20 bar
- 10 MPa = 100 bar
- 20 MPa = 200 bar (scuba tank)
What is a typical hydraulic system pressure?
Low pressure: 7-14 MPa (1,000-2,000 PSI)
- Automotive power steering: 8-12 MPa
- Light hydraulic lifts: 7-10 MPa
Medium pressure: 14-21 MPa (2,000-3,000 PSI)
- Construction equipment: 20-25 MPa
- Agricultural machinery: 14-20 MPa
- Automotive brakes: 10-15 MPa
High pressure: 21-35 MPa (3,000-5,000 PSI)
- Industrial presses: 25-35 MPa
- Heavy construction: 30-35 MPa
- Excavators: 30-35 MPa
Very high pressure: >35 MPa (>5,000 PSI)
- Hydraulic jacks: 50-70 MPa
- Specialized industrial: 70-100 MPa
Why use MPa instead of PSI for material strength?
SI standard: International engineering uses MPa universally Simpler numbers: 400 MPa vs 58,000 PSI Scientific: Consistent with stress calculations (force/area in N/m²) Global: Specifications understood worldwide
Conversion: PSI ÷ 145 ≈ MPa (or PSI × 0.00689 = MPa)
Example: Steel yield strength
- As MPa: 250-400 MPa (easy)
- As PSI: 36,000-58,000 PSI (unwieldy)
About Millibar (mbar)
Is mbar the same as hPa?
Yes! 1 mbar = 1 hPa exactly (just different names, same value)
Millibar (mbar):
- Traditional meteorology unit (1900s-1980s)
- Still used: Aviation, maritime, older weather services
- Pilots/mariners: "Set altimeter to 1015 millibars"
Hectopascal (hPa):
- SI-compliant name (1980s-present)
- Modern: Weather services worldwide officially use hPa
- Scientific: Consistent with SI unit system
No conversion needed: 1,013 mbar = 1,013 hPa (identical)
Why two names?: Transition to SI units in 1980s. Chose "hectopascal" because 1 hPa = 1 mbar exactly, making transition seamless. Old term persists in aviation/maritime.
How do I convert mbar to PSI?
Formula: PSI = mbar × 0.0145038
Examples:
- 1,013 mbar = 14.7 PSI (sea level)
- 1,000 mbar = 14.5 PSI
- 900 mbar = 13.05 PSI (storm)
- 800 mbar = 11.6 PSI
- 500 mbar = 7.25 PSI (FL180)
What is normal atmospheric pressure in mbar?
Standard sea level: 1,013.25 mbar (exactly, by definition)
Typical range: 980-1,050 mbar depending on weather
Pressure variations:
- Fair weather (high): 1,020-1,040 mbar
- Normal range: 1,000-1,020 mbar
- Stormy (low): 980-1,000 mbar
- Hurricane: <980 mbar
Regional/seasonal: Varies ±30 mbar from standard
Altitude: Decreases ~12 mbar per 100m near sea level
What mbar is considered high or low pressure?
High pressure (anticyclone):
- Strong high: >1,030 mbar (stable, clear weather)
- Moderate high: 1,020-1,030 mbar (fair weather)
Normal pressure: 1,005-1,020 mbar
Low pressure (cyclone):
- Moderate low: 990-1,005 mbar (cloudy, possible rain)
- Strong low: 970-990 mbar (rain, wind)
- Very low: <970 mbar (storms, gales)
Extreme low: <920 mbar (major hurricanes/typhoons)
Context matters: 1,000 mbar may be "low" in winter high-pressure region, "high" in tropical area.
Why do pilots still say "millibar" instead of "hectopascal"?
Historical training: Aviation training used mbar for decades International: ICAO (aviation authority) still references millibars Brevity: "Millibar" rolls off tongue easier than "hectopascal" Tradition: Aviation conservative about terminology changes Communication: Older pilots, documents use mbar
Modern transition:
- Official: ICAO now uses hPa in documents
- Practice: Pilots use both terms interchangeably
- Altimeter: Settings shown as "1013 hPa" or "1013 mb"
No confusion: Since 1 mbar = 1 hPa exactly, using either term causes no errors.
Maritime similar: Sailors also prefer "millibar" from tradition.
Conversion Table: Megapascal to Millibar
| Megapascal (MPa) | Millibar (mbar) |
|---|---|
| 0.5 | 5,000 |
| 1 | 10,000 |
| 1.5 | 15,000 |
| 2 | 20,000 |
| 5 | 50,000 |
| 10 | 100,000 |
| 25 | 250,000 |
| 50 | 500,000 |
| 100 | 1,000,000 |
| 250 | 2,500,000 |
| 500 | 5,000,000 |
| 1,000 | 10,000,000 |
People Also Ask
How do I convert Megapascal to Millibar?
To convert Megapascal to Millibar, enter the value in Megapascal in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our pressure converter page to convert between other units in this category.
Learn more →What is the conversion factor from Megapascal to Millibar?
The conversion factor depends on the specific relationship between Megapascal and Millibar. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.
Can I convert Millibar back to Megapascal?
Yes! You can easily convert Millibar back to Megapascal by using the swap button (⇌) in the calculator above, or by visiting our Millibar to Megapascal converter page. You can also explore other pressure conversions on our category page.
Learn more →What are common uses for Megapascal and Millibar?
Megapascal and Millibar are both standard units used in pressure measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our pressure converter for more conversion options.
For more pressure conversion questions, visit our FAQ page or explore our conversion guides.
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📚 How to Convert Units
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⚠️ Common Mistakes
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All Pressure Conversions
Other Pressure Units and Conversions
Explore other pressure units and their conversion options:
- Pascal (Pa) • Megapascal to Pascal
- Kilopascal (kPa) • Megapascal to Kilopascal
- Hectopascal (hPa) • Megapascal to Hectopascal
- Bar (bar) • Megapascal to Bar
- Atmosphere (atm) • Megapascal to Atmosphere
- Technical Atmosphere (at) • Megapascal to Technical Atmosphere
- Torr (Torr) • Megapascal to Torr
- Millimeter of Mercury (mmHg) • Megapascal to Millimeter of Mercury
- Inch of Mercury (inHg) • Megapascal to Inch of Mercury
- Pound per Square Inch (psi) • Megapascal to Pound per Square Inch
Verified Against Authority Standards
All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.
National Institute of Standards and Technology — Fundamental physical constants and unit conversions
Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards
International Organization for Standardization — Quantities and units international standards series
Last verified: February 19, 2026