Kips per square inch.
KSI to Ronnapascals Converter — ksi to RPa
Convert KSI (ksi) to Ronnapascal (RPa) using the exact conversion factor (1 ksi = 6.894757e-21 ronnapascal). See the formula, worked examples, and conversion table.
KSI to Ronnapascals 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.
Ronnapascal is 1e+27 pascal units.
Result = input x 6.89475729e+6 / 1e+27.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting KSI to Ronnapascals
KSI and Ronnapascal 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: Kips per square inch, and ronnapascal is 1e+27 pascal units.
Formula
ronnapascals = ksi × 6.894757e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 ksi equals 6894757.29317 base units, and 1 ronnapascal equals 1e+27 base units, so dividing one by the other gives the direct ksi-to-ronnapascal factor of 6.894757e-21.
Simple example
1 ksi × 6.894757e-21 = 6.894757e-21 RPa
1 ksi = 6.894757e-21 ronnapascals.
Real-world example
100 ksi × 6.894757e-21 = 6.894757e-19 RPa
100 ksi = 6.894757e-19 ronnapascals.
Conversion table
| KSI (ksi) | Ronnapascal (RPa) |
|---|---|
| 1 ksi | 6.894757e-21 RPa |
| 10 ksi | 6.894757e-20 RPa |
| 50 ksi | 3.447379e-19 RPa |
| 100 ksi | 6.894757e-19 RPa |
| 500 ksi | 3.447379e-18 RPa |
| 1,000 ksi | 6.894757e-18 RPa |
Reverse conversion: Ronnapascal to KSI
6.894757e-21 RPa × 1.450377e+20 = 0.9999999575 ksi
6.894757e-21 ronnapascals = 0.9999999575 ksi.
ksi = ronnapascals × 1.450377e+20
For a page dedicated to this direction, see Ronnapascal to KSI.
Understanding the KSI (ksi)
Kips per square inch.
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 ksi?
1 ksi equals 6.894757e-21 ronnapascals, using the exact defined conversion factor rather than an estimate.
How do I convert ksi to ronnapascal?
Multiply the ksi value by 6.894757e-21. The converter above does this instantly to whatever precision you set.
How do I convert ronnapascal back to ksi?
Use the reverse factor: 1 ronnapascal equals 1.450377e+20 ksi. You can also use the swap control in the converter above to flip the direction instantly.
What is a ksi?
KSI (ksi) is a unit of engineering.
What is a ronnapascal?
Ronnapascal (RPa) is a unit of engineering.
Is the ksi to ronnapascal conversion exact?
Yes. Both ksi and ronnapascal are defined by fixed standards rather than physical artifacts, so the factor of 6.894757e-21 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.