KSI to PSI
Convert ksi to psi instantly. 1 ksi = 1,000 psi. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert ksi to psi
To convert ksi to psi, multiply by 1,000. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
psi = ksi × 1,000
KSI to PSI conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| KSI | PSI |
|---|---|
| 1 ksi | 1,000 psi |
| 2 ksi | 2,000 psi |
| 3 ksi | 3,000 psi |
| 5 ksi | 5,000 psi |
| 10 ksi | 10,000 psi |
| 20 ksi | 20,000 psi |
| 25 ksi | 25,000 psi |
| 50 ksi | 50,000 psi |
| 100 ksi | 100,000 psi |
| 500 ksi | 500,000 psi |
| 1,000 ksi | 1,000,000 psi |
What is a ksi?
A thousand psi, used for structural steel strength.
What is a psi?
Pounds per square inch, the US pressure unit for tyres and plumbing.
The formula
psi = ksi × 1,000
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the KSI to PSI
- Type the number of ksi you want to convert.
- Read the result in psi straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked psi to ksi page.
KSI to PSI — frequently asked questions
How many psi are in a ksi?
One ksi equals 1,000 psi. psi = ksi × 1,000
What is the formula to convert ksi to psi?
The formula is psi = ksi × 1,000. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert psi back to ksi?
Divide instead of multiplying: one psi is 0.001 ksi. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this ksi to psi free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the ksi to psi.
- ksi to psi
- 1 ksi to psi
- how many psi in a ksi
- ksi2psi
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error