Convert Bar to MPa
1 bar equals 0.1 MPa.
Bar to MPa Converter
How to Convert Bar to MPa
1 bar = 0.1 MPa
MPa = Bar × 0.1
Example: 1 bar × 0.1 = 0.1 MPa
Reverse Conversion
To convert MPa back to bar:
- Remember, 1 MPa equals 10 bar.
- To convert 0.1 MPa to bar, multiply
0.1 x 10, resulting in1 bar.
Bar to MPa Conversion Table
Reference table with common bar to mpa conversions. All values calculated with high precision.
Bar to MPa Table
10 to 1000000
MPa to Bar Table
1 to 100000
Definition of Bar
Bar: A Widely Used Pressure Unit
The bar is a metric unit of pressure defined as exactly 100,000 pascals (100 kPa). While not an SI unit, it is accepted for use with the SI and is widely used in meteorology, engineering, and industry. The bar is particularly convenient because standard atmospheric pressure (1 atm) is approximately equal to 1 bar (actually 1.01325 bar).
Conversions to Other Units of Measurement:
- Pascal (Pa): 1 bar equals exactly 100,000 pascals. This conversion is used when working with SI units. For example, 2 bar equals 200,000 Pa or 200 kPa.
- PSI (Pound per Square Inch): 1 bar equals approximately 14.5038 psi. This is one of the most common conversions in industrial applications. For example, a tire pressure of 2.5 bar equals approximately 36.3 psi.
- Atmosphere (atm): 1 bar equals approximately 0.986923 atm. Standard atmospheric pressure (1 atm) equals 1.01325 bar.
- Kilopascal (kPa): 1 bar equals exactly 100 kPa. This conversion is straightforward and commonly used in engineering. For example, 3.5 bar equals 350 kPa.
- Millibar (mbar): 1 bar equals exactly 1,000 millibar. Millibars are commonly used in meteorology for atmospheric pressure measurements.
The bar is valued for its practical convenience, being close to atmospheric pressure while having a simple relationship with SI units.
- Definition
- Metric pressure unit equal to exactly 100,000 pascals.
- Exact factor
- 1 bar = 100,000 Pa (exact); 1 bar = 10⁵ Pa
- Common equivalents
- 1 bar = 1,000 mbar (exact)
- 1 bar ≈ 14.50377 psi
- 1 bar ≈ 0.986923 atm
- Sources
Definition of MPa
Megapascal: High-Pressure Applications
The megapascal (MPa) is an SI-derived unit of pressure equal to 1,000,000 pascals (1,000 kPa or 10 bar). It is commonly used in engineering and materials science for measuring high pressures, such as the tensile strength of materials, hydraulic system pressures, and geological pressures. The megapascal provides convenient numbers when dealing with pressures that would be unwieldy in pascals or kilopascals.
Conversions to Other Units of Measurement:
- Bar: 1 megapascal equals exactly 10 bar. This simple relationship makes MPa convenient for high-pressure industrial work. For example, 20 MPa equals 200 bar.
- PSI: 1 megapascal equals approximately 145.038 psi. This conversion is essential for engineering specifications. For example, a steel with 250 MPa yield strength equals approximately 36,260 psi.
- Kilopascal (kPa): 1 megapascal equals exactly 1,000 kPa. For example, 5 MPa equals 5,000 kPa.
- Pascal (Pa): 1 megapascal equals exactly 1,000,000 pascals. This is the fundamental SI relationship.
- Atmosphere (atm): 1 megapascal equals approximately 9.86923 atm. This shows that MPa represents significantly higher pressures than atmospheric.
The megapascal is essential in structural engineering, material science, and any application involving high pressures.
- Definition
- SI-derived pressure unit equal to 1,000,000 pascals (10⁶ Pa).
- Exact factor
- 1 MPa = 1,000,000 Pa (exact); 1 MPa = 10 bar (exact)
- Common equivalents
- 1 MPa = 1,000 kPa (exact)
- 1 MPa ≈ 145.038 psi
- 1 MPa ≈ 9.86923 atm
- Sources
About the Bar
Facts & Uses
- 1 bar = 100,000 Pa = 100 kPa exactly. Defined in 1909 by Vilhelm Bjerknes as a convenient meteorological unit close to atmospheric pressure.
- Standard for tire pressure in many European countries (~2.0-2.5 bar for cars), compressed air systems, and water pressure.
- Common in diving (1 bar per 10 m of seawater depth), brewing (espresso extraction at 9 bar), and scuba tanks (200-300 bar fill pressure).
- Weather use: millibars (mbar) = 1/1000 bar = hectopascals (hPa). 1013 mbar = standard sea level pressure.
Curiosities
- The bar is not part of the SI, but is accepted for use with the SI system because of its convenient scale and historical adoption in meteorology.
- The name comes from the Greek "baros" (βάρος) meaning "weight" — also the root of "barometer" and "barometric pressure".
- Atmospheric pressure varies from a record low of 870 mbar (Typhoon Tip, 1979) to a record high of 1085 mbar (Mongolia, 2001).
- Approximate equivalents: 1 bar = 14.504 psi = 0.987 atm = 750 mmHg.
Sources
About the MPa
Facts & Uses
- 1 MPa = 1,000,000 Pa = 1 N/mm² exactly — the convenient unit for high pressures and material stresses.
- Standard in materials science for tensile strength: structural steel ≈ 250 MPa yield, high-strength steel 400-700 MPa, carbon fiber 3500+ MPa.
- Used in hydraulic systems (typical hydraulic pressures 10-35 MPa), injection molding, and industrial pressure vessels.
- High-pressure applications: diamond anvil cells reach 100-300 GPa; deep ocean trenches around 100 MPa at the Mariana Trench.
Curiosities
- Concrete compressive strength is typically expressed in MPa: 25 MPa for residential, 40+ MPa for high-rise buildings, 100+ MPa for ultra-high-performance concrete.
- The Earth's pressure at the core-mantle boundary reaches about 136 GPa = 136,000 MPa — beyond what can be sustained at the surface in any container.
- 1 MPa is approximately the pressure under a 1 cm column of mercury per square millimeter, or about 145 psi.
- Approximate equivalents: 1 MPa = 145 psi = 9.87 atm = 10 bar.
Sources
Frequently Asked Questions
How many MPa are in one bar?
One bar equals 0.1 MPa. To convert, multiply the bar value by 0.1. For the reverse, divide the MPa value by 0.1 (or multiply by 10).
What is 0.008 bar in MPa?
0.008 bar = 0.0008 MPa. This is one of the most commonly searched conversions for this pair.
How precise is the bar-to-MPa conversion?
The factor 0.1 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert MPa to Bar
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