Micropascal is 0.000001 pascal units.
Micropascals to Rontopascals Converter — uPa to rPa
Convert Micropascal (uPa) to Rontopascal (rPa) using the exact conversion factor (1 micropascal = 1e+21 rontopascal). See the formula, worked examples, and conversion table.
Micropascals to Rontopascals 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.
Rontopascal 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 Micropascals to Rontopascals
Micropascal and Rontopascal 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: Micropascal is 0.000001 pascal units, and rontopascal is 1e-27 pascal units.
Formula
rontopascals = micropascals × 1e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 micropascal equals 0.000001 base units, and 1 rontopascal equals 1e-27 base units, so dividing one by the other gives the direct micropascal-to-rontopascal factor of 1e+21.
Simple example
1 uPa × 1e+21 = 1e+21 rPa
1 micropascal = 1e+21 rontopascals.
Real-world example
35 uPa × 1e+21 = 3.5e+22 rPa
35 micropascals = 3.5e+22 rontopascals.
Conversion table
| Micropascal (uPa) | Rontopascal (rPa) |
|---|---|
| 1 uPa | 1e+21 rPa |
| 5 uPa | 5e+21 rPa |
| 10 uPa | 1e+22 rPa |
| 25 uPa | 2.5e+22 rPa |
| 50 uPa | 5e+22 rPa |
| 100 uPa | 1e+23 rPa |
Reverse conversion: Rontopascal to Micropascal
1e+21 rPa × 1e-21 = 1 uPa
1e+21 rontopascals = 1 micropascal.
micropascals = rontopascals × 1e-21
For a page dedicated to this direction, see Rontopascal to Micropascal.
Understanding the Micropascal (uPa)
Micropascal is 0.000001 pascal units.
Understanding the Rontopascal (rPa)
Rontopascal is 1e-27 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many rontopascals are in 1 micropascal?
1 micropascal equals 1e+21 rontopascals, using the exact defined conversion factor rather than an estimate.
How do I convert micropascal to rontopascal?
Multiply the micropascal value by 1e+21. The converter above does this instantly to whatever precision you set.
How do I convert rontopascal back to micropascal?
Use the reverse factor: 1 rontopascal equals 1e-21 micropascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a micropascal?
Micropascal (uPa) is a unit of pressure.
What is a rontopascal?
Rontopascal (rPa) is a unit of pressure.
Is the micropascal to rontopascal conversion exact?
Yes. Both micropascal and rontopascal 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.