Convert Pascals to Millibars
1 pascal (Pa) equals 0.01 millibars (mbar).
1 Pa = 0.01 mbar
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pascal to millibar converter to paste a column from Excel.
How to Convert Pascal to Millibar
- 1 Pa = 0.01 mbar
- 1 mbar = 100 Pa
- Example: convert 15 Pa to mbar: 15 Pa = 15 × 0.01 mbar = 0.15 mbar
Formula
mbar = Pa ÷ 100
Derivation from SI units:
- 1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻²
- 1 mbar = 10⁻³ bar = 100 Pa = 1 hPa
Both units are defined exactly, so the factor is exact. Pascal definition: pascal; Millibar definition: millibar.
Worked examples
- A final filter pressure drop of 250 Pa is 2.5 mbar.
250 Pa × 0.01 = 2.5 mbar - A UK natural-gas appliance inlet pressure of 2000 Pa is 20 mbar.
2000 Pa × 0.01 = 20 mbar
Pascal to Millibar conversion table
| Pascals (Pa) | Millibars (mbar) |
|---|---|
| 1 Pa | 0.01 mbar |
| 5 Pa | 0.05 mbar |
| 10 Pa | 0.1 mbar |
| 15 Pa | 0.15 mbar |
| 25 Pa | 0.25 mbar |
| 50 Pa | 0.5 mbar |
| 75 Pa | 0.75 mbar |
| 100 Pa | 1 mbar |
| 125 Pa | 1.25 mbar |
| 150 Pa | 1.5 mbar |
| 200 Pa | 2 mbar |
| 250 Pa | 2.5 mbar |
| 300 Pa | 3 mbar |
| 400 Pa | 4 mbar |
| 500 Pa | 5 mbar |
| 750 Pa | 7.5 mbar |
| 1000 Pa | 10 mbar |
| 1500 Pa | 15 mbar |
| 2000 Pa | 20 mbar |
| 2500 Pa | 25 mbar |
| 5000 Pa | 50 mbar |
| 10000 Pa | 100 mbar |
| 50000 Pa | 500 mbar |
| 101325 Pa | 1013.25 mbar |
Where it's used
One millibar is exactly 100 Pa and equals one hectopascal, so the conversion is a factor of 100. Weather services and European gas engineers use mbar or hPa; building physics and cleanroom work use Pa.
Pascal to other pressure units
| Conversion | 1 Pa equals |
|---|---|
| pascal to kilopascal | 0.001 kPa |
| pascal to megapascal | 0.000001 MPa |
| pascal to psi | 0.0001450377377 psi |
| pascal to bar | 0.00001 bar |
| pascal to millibar | 0.01 mbar |
| pascal to decibar | 0.0001 dbar |
| pascal to torr | 0.007500616827 Torr |
| pascal to millimeter of mercury | 0.007500615758 mmHg |
| pascal to millimeter of water | 0.1019716213 mmH₂O |
| pascal to centimeter of water | 0.01019716213 cmH₂O |
| pascal to inch of water | 0.00401463076 inH₂O |
| pascal to inch of water (60 °F) | 0.00401864652 inH₂O (60 °F) |
| pascal to inch of mercury | 0.000295299833 inHg |
| pascal to atmosphere | 0.000009869232667 atm |
| pascal to barye | 10 Ba |
Frequently asked questions
Is mbar the same as hPa?
Yes. 1 mbar = 1 hPa = 100 Pa exactly, which is why weather reports could switch from millibars to hectopascals without changing any numbers.
How many millibars are in 1 pascal?
1 Pa = 0.01 mbar.
How do I convert pascals to millibars?
Multiply the value in Pa by 0.01, or divide it by 100. For example, 15 Pa × 0.01 = 0.15 mbar.
Is the Pa to mbar conversion exact?
Yes. Both units are defined exactly, and 1 Pa is exactly 0.01 mbar.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "millibar".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pascals to Millibars. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/pascal-to-millibar/
IEEE
Scientific Converters, "Convert Pascals to Millibars," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/pascal-to-millibar/