Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Bar to Megapascals
Convert bar to MPa instantly, then review the formula, assumptions, and rounding guidance.
Pressure & stressInstant result
Decimals
Formula result = input × 100000 ÷ 1000000. 1 bar = 0.1 MPa
Common examples
One value, several units
Pascals100,000 Pa
Kilopascals100 kPa
Megapascals0.1 MPa
Atmospheres0.9869 atm
Pounds per square inch14.5038 psi
Millimetres of mercury750.0616 mmHg
Conversion table
| bar | MPa |
|---|---|
| 1 bar | 0.1 MPa |
| 2 bar | 0.2 MPa |
| 5 bar | 0.5 MPa |
| 10 bar | 1 MPa |
| 25 bar | 2.5 MPa |
| 50 bar | 5 MPa |
| 100 bar | 10 MPa |
Conversion chart
1 bar0.1 MPa
5 bar0.5 MPa
10 bar1 MPa
25 bar2.5 MPa
50 bar5 MPa
Worked example
Standard atmosphere is 101,325 pascals.
Unit definition
Bar (bar) One bar equals 100,000 pascal.
Unit history
Bar is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert bar to pascal.
3. Convert the base value to MPa and apply your display precision.
Understand the result before using it
Bar to Megapascals converts a value measured in Bar (bar) into the equivalent value in Megapascals (MPa). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 100000 ÷ 1000000
Assumptions
- Bar and Megapascals represent the same pressure & stress quantity.
- The input is expressed in bar; the output is expressed in MPa.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 bar = 0.1 MPa. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a bar measurement in a document that expects MPa.
- Compare a bar value with a value reported in megapascals.
- Check the bar-to-MPa arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse bar with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Bar to Megapascals?
result = input × 100000 ÷ 1000000 Using the displayed relationship, 1 bar equals 0.1 MPa.
How many Megapascals are in one Bar?
One Bar is 0.1 Megapascals. The displayed digits may be rounded.
Can I reverse the bar to MPa conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts MPa back to bar.
Is the Bar to Megapascals result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.