Attopascal is 1e-18 pascal units.
Attopascals to Yoctopascals Converter — aPa to yPa
Convert Attopascal (aPa) to Yoctopascal (yPa) using the exact conversion factor (1 attopascal = 1,000,000 yoctopascal). See the formula, worked examples, and conversion table.
Attopascals to Yoctopascals converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Yoctopascal is 1e-24 pascal units.
Result = input x 1e-18 / 1e-24.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attopascals to Yoctopascals
Attopascal and Yoctopascal both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Attopascal is 1e-18 pascal units, and yoctopascal is 1e-24 pascal units.
Formula
yoctopascals = attopascals × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 attopascal equals 1e-18 base units, and 1 yoctopascal equals 1e-24 base units, so dividing one by the other gives the direct attopascal-to-yoctopascal factor of 1000000.
Simple example
1 aPa × 1000000 = 1,000,000 yPa
1 attopascal = 1,000,000 yoctopascals.
Real-world example
100 aPa × 1000000 = 100,000,000 yPa
100 attopascals = 100,000,000 yoctopascals.
Conversion table
| Attopascal (aPa) | Yoctopascal (yPa) |
|---|---|
| 1 aPa | 1,000,000 yPa |
| 10 aPa | 10,000,000 yPa |
| 50 aPa | 50,000,000 yPa |
| 100 aPa | 100,000,000 yPa |
| 500 aPa | 500,000,000 yPa |
| 1,000 aPa | 1,000,000,000 yPa |
Reverse conversion: Yoctopascal to Attopascal
1 yPa × 0.000001 = 0.000001 aPa
1 yoctopascal = 0.000001 attopascals.
attopascals = yoctopascals × 0.000001
For a page dedicated to this direction, see Yoctopascal to Attopascal.
Understanding the Attopascal (aPa)
Attopascal is 1e-18 pascal units.
Understanding the Yoctopascal (yPa)
Yoctopascal is 1e-24 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctopascals are in 1 attopascal?
1 attopascal equals 1,000,000 yoctopascals, using the exact defined conversion factor rather than an estimate.
How do I convert attopascal to yoctopascal?
Multiply the attopascal value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert yoctopascal back to attopascal?
Use the reverse factor: 1 yoctopascal equals 0.000001 attopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a attopascal?
Attopascal (aPa) is a unit of engineering.
What is a yoctopascal?
Yoctopascal (yPa) is a unit of engineering.
Is the attopascal to yoctopascal conversion exact?
Yes. Both attopascal and yoctopascal are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.