Attopascal is 1e-18 pascal units.
Attopascals to KSI Converter — aPa to ksi
Convert Attopascal (aPa) to KSI (ksi) using the exact conversion factor (1 attopascal = 1.450377e-25 ksi). See the formula, worked examples, and conversion table.
Attopascals to KSI 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.
Kips per square inch.
Result = input x 1e-18 / 6.89475729e+6.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attopascals to KSI
Attopascal and KSI 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: Attopascal is 1e-18 pascal units, and kips per square inch.
Formula
ksi = attopascals × 1.450377e-25
This factor comes from each unit's defined relationship to the category's base unit: 1 attopascal equals 1e-18 base units, and 1 ksi equals 6894757.29317 base units, so dividing one by the other gives the direct attopascal-to-ksi factor of 1.450377e-25.
Simple example
1 aPa × 1.450377e-25 = 1.450377e-25 ksi
1 attopascal = 1.450377e-25 ksi.
Real-world example
35 aPa × 1.450377e-25 = 5.076321e-24 ksi
35 attopascals = 5.076321e-24 ksi.
Conversion table
| Attopascal (aPa) | KSI (ksi) |
|---|---|
| 1 aPa | 1.450377e-25 ksi |
| 5 aPa | 7.251887e-25 ksi |
| 10 aPa | 1.450377e-24 ksi |
| 25 aPa | 3.625943e-24 ksi |
| 50 aPa | 7.251887e-24 ksi |
| 100 aPa | 1.450377e-23 ksi |
Reverse conversion: KSI to Attopascal
1.450377e-25 ksi × 6.894757e+24 = 0.9999997399 aPa
1.450377e-25 ksi = 0.9999997399 attopascals.
attopascals = ksi × 6.894757e+24
For a page dedicated to this direction, see KSI to Attopascal.
Understanding the Attopascal (aPa)
Attopascal is 1e-18 pascal units.
Understanding the KSI (ksi)
Kips per square inch.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ksi are in 1 attopascal?
1 attopascal equals 1.450377e-25 ksi, using the exact defined conversion factor rather than an estimate.
How do I convert attopascal to ksi?
Multiply the attopascal value by 1.450377e-25. The converter above does this instantly to whatever precision you set.
How do I convert ksi back to attopascal?
Use the reverse factor: 1 ksi equals 6.894757e+24 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 pressure.
What is a ksi?
KSI (ksi) is a unit of pressure.
Is the attopascal to ksi conversion exact?
Yes. Both attopascal and ksi are defined by fixed standards rather than physical artifacts, so the factor of 1.450377e-25 used above is exact to as many digits as you choose to display.