Convert Megapascals to Decibars
1 megapascal (MPa) equals 100 decibars (dbar).
1 MPa = 100 dbar
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megapascal to decibar converter to paste a column from Excel.
How to Convert Megapascal to Decibar
- 1 MPa = 100 dbar
- 1 dbar = 0.01 MPa
- Example: convert 15 MPa to dbar: 15 MPa = 15 × 100 dbar = 1500 dbar
Formula
dbar = MPa × 100
Derivation from SI units:
- 1 MPa = 10⁶ Pa = 1 N/mm²
- 1 dbar = 10⁻¹ bar = 10⁴ Pa
- 1 MPa = 1000000 Pa ÷ 10000 Pa per dbar = 100 dbar
Both units are defined exactly, so the factor is exact. Megapascal definition: megapascal; Decibar definition: decibar.
Worked examples
- A reading of 2 MPa converts to 200 dbar.
2 MPa × 100 = 200 dbar - A value of 30 MPa is 3000 dbar.
30 MPa × 100 = 3000 dbar
Megapascal to Decibar conversion table
| Megapascals (MPa) | Decibars (dbar) |
|---|---|
| 0.01 MPa | 1 dbar |
| 0.05 MPa | 5 dbar |
| 0.1 MPa | 10 dbar |
| 0.2 MPa | 20 dbar |
| 0.5 MPa | 50 dbar |
| 0.7 MPa | 70 dbar |
| 1 MPa | 100 dbar |
| 1.5 MPa | 150 dbar |
| 2 MPa | 200 dbar |
| 2.5 MPa | 250 dbar |
| 5 MPa | 500 dbar |
| 7 MPa | 700 dbar |
| 10 MPa | 1000 dbar |
| 15 MPa | 1500 dbar |
| 20 MPa | 2000 dbar |
| 25 MPa | 2500 dbar |
| 30 MPa | 3000 dbar |
| 40 MPa | 4000 dbar |
| 50 MPa | 5000 dbar |
| 70 MPa | 7000 dbar |
| 100 MPa | 10000 dbar |
| 200 MPa | 20000 dbar |
| 250 MPa | 25000 dbar |
| 355 MPa | 35500 dbar |
| 500 MPa | 50000 dbar |
Where it's used
Megapascals are used for concrete compressive strength (typically 20–50 MPa), while decibars appear in oceanography: CTD instruments report sea pressure in dbar. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Megapascal to other pressure units
| Conversion | 1 MPa equals |
|---|---|
| megapascal to pascal | 1000000 Pa |
| megapascal to kilopascal | 1000 kPa |
| megapascal to psi | 145.0377377 psi |
| megapascal to bar | 10 bar |
| megapascal to millibar | 10000 mbar |
| megapascal to decibar | 100 dbar |
| megapascal to torr | 7500.616827 Torr |
| megapascal to millimeter of mercury | 7500.615758 mmHg |
| megapascal to millimeter of water | 101971.6213 mmH₂O |
| megapascal to centimeter of water | 10197.16213 cmH₂O |
| megapascal to inch of water | 4014.63076 inH₂O |
| megapascal to inch of water (60 °F) | 4018.64652 inH₂O (60 °F) |
| megapascal to inch of mercury | 295.299833 inHg |
| megapascal to atmosphere | 9.869232667 atm |
| megapascal to barye | 10000000 Ba |
Frequently asked questions
How many decibars are in 1 megapascal?
1 MPa = 100 dbar.
How do I convert megapascals to decibars?
Multiply the value in MPa by 100. For example, 15 MPa × 100 = 1500 dbar.
Is the MPa to dbar conversion exact?
Yes. Both units are defined exactly, and 1 MPa is exactly 100 dbar.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- 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, "bar", with SI prefix deci (10⁻¹).
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 Megapascals to Decibars. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/megapascal-to-decibar/
IEEE
Scientific Converters, "Convert Megapascals to Decibars," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/megapascal-to-decibar/