Yoctopascal is 1e-24 pascal units.
Yoctopascals to Millipascals Converter — yPa to mPa
Convert Yoctopascal (yPa) to Millipascal (mPa) using the exact conversion factor (1 yoctopascal = 1e-21 millipascal). See the formula, worked examples, and conversion table.
Yoctopascals to Millipascals 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.
Millipascal is 0.001 pascal units.
Result = input x 1e-24 / 0.001.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Yoctopascals to Millipascals
Yoctopascal and Millipascal 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: Yoctopascal is 1e-24 pascal units, and millipascal is 0.001 pascal units.
Formula
millipascals = yoctopascals × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctopascal equals 1e-24 base units, and 1 millipascal equals 0.001 base units, so dividing one by the other gives the direct yoctopascal-to-millipascal factor of 1e-21.
Simple example
1 yPa × 1e-21 = 1e-21 mPa
1 yoctopascal = 1e-21 millipascals.
Real-world example
35 yPa × 1e-21 = 3.5e-20 mPa
35 yoctopascals = 3.5e-20 millipascals.
Conversion table
| Yoctopascal (yPa) | Millipascal (mPa) |
|---|---|
| 1 yPa | 1e-21 mPa |
| 5 yPa | 5e-21 mPa |
| 10 yPa | 1e-20 mPa |
| 25 yPa | 2.5e-20 mPa |
| 50 yPa | 5e-20 mPa |
| 100 yPa | 1e-19 mPa |
Reverse conversion: Millipascal to Yoctopascal
1e-21 mPa × 1e+21 = 1 yPa
1e-21 millipascals = 1 yoctopascal.
yoctopascals = millipascals × 1e+21
For a page dedicated to this direction, see Millipascal to Yoctopascal.
Understanding the Yoctopascal (yPa)
Yoctopascal is 1e-24 pascal units.
Understanding the Millipascal (mPa)
Millipascal is 0.001 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millipascals are in 1 yoctopascal?
1 yoctopascal equals 1e-21 millipascals, using the exact defined conversion factor rather than an estimate.
How do I convert yoctopascal to millipascal?
Multiply the yoctopascal value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert millipascal back to yoctopascal?
Use the reverse factor: 1 millipascal equals 1e+21 yoctopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctopascal?
Yoctopascal (yPa) is a unit of pressure.
What is a millipascal?
Millipascal (mPa) is a unit of pressure.
Is the yoctopascal to millipascal conversion exact?
Yes. Both yoctopascal and millipascal 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.