Megapascal is 1000000 pascal units.
Megapascals to Ronnapascals Converter — MPa to RPa
Convert Megapascal (MPa) to Ronnapascal (RPa) using the exact conversion factor (1 megapascal = 1e-21 ronnapascal). See the formula, worked examples, and conversion table.
Megapascals to Ronnapascals converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
Ronnapascal is 1e+27 pascal units.
Result = input x 1e+6 / 1e+27.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megapascals to Ronnapascals
Megapascal and Ronnapascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Megapascal is 1000000 pascal units, and ronnapascal is 1e+27 pascal units.
Formula
ronnapascals = megapascals × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 megapascal equals 1000000 base units, and 1 ronnapascal equals 1e+27 base units, so dividing one by the other gives the direct megapascal-to-ronnapascal factor of 1e-21.
Simple example
1 MPa × 1e-21 = 1e-21 RPa
1 megapascal = 1e-21 ronnapascals.
Real-world example
35 MPa × 1e-21 = 3.5e-20 RPa
35 megapascals = 3.5e-20 ronnapascals.
Conversion table
| Megapascal (MPa) | Ronnapascal (RPa) |
|---|---|
| 1 MPa | 1e-21 RPa |
| 5 MPa | 5e-21 RPa |
| 10 MPa | 1e-20 RPa |
| 25 MPa | 2.5e-20 RPa |
| 50 MPa | 5e-20 RPa |
| 100 MPa | 1e-19 RPa |
Reverse conversion: Ronnapascal to Megapascal
1e-21 RPa × 1e+21 = 1 MPa
1e-21 ronnapascals = 1 megapascals.
megapascals = ronnapascals × 1e+21
For a page dedicated to this direction, see Ronnapascal to Megapascal.
Understanding the Megapascal (MPa)
Megapascal is 1000000 pascal units.
Understanding the Ronnapascal (RPa)
Ronnapascal is 1e+27 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ronnapascals are in 1 megapascal?
1 megapascal equals 1e-21 ronnapascals, using the exact defined conversion factor rather than an estimate.
How do I convert megapascal to ronnapascal?
Multiply the megapascal value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert ronnapascal back to megapascal?
Use the reverse factor: 1 ronnapascal equals 1e+21 megapascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a megapascal?
Megapascal (MPa) is a unit of pressure.
What is a ronnapascal?
Ronnapascal (RPa) is a unit of pressure.
Is the megapascal to ronnapascal conversion exact?
Yes. Both megapascal and ronnapascal are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 used above is exact to as many digits as you choose to display.