Inches of Water to KSI
Convert inches of water to ksi instantly. 1 inH2O = 3.61273e-05 ksi. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert inches of water to ksi
To convert inches of water to ksi, divide by 27679.9058214477 (multiply by 3.61273e-05). 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.
ksi = inH2O × 3.61273e-05
Inches of Water to KSI conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Inches of Water | KSI |
|---|---|
| 1 inH2O | 3.613e-05 ksi |
| 2 inH2O | 7.225e-05 ksi |
| 3 inH2O | 0.0001084 ksi |
| 5 inH2O | 0.0001806 ksi |
| 10 inH2O | 0.0003613 ksi |
| 20 inH2O | 0.0007225 ksi |
| 25 inH2O | 0.0009032 ksi |
| 50 inH2O | 0.001806 ksi |
| 100 inH2O | 0.003613 ksi |
| 500 inH2O | 0.018064 ksi |
| 1,000 inH2O | 0.036127 ksi |
What is a inches of water?
A low-pressure unit used for ventilation and gas appliances.
What is a ksi?
A thousand psi, used for structural steel strength.
The formula
ksi = inH2O × 3.61273e-05
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 Inches of Water to KSI
- Type the number of inches of water you want to convert.
- Read the result in ksi 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 ksi to inches of water page.
Inches of Water to KSI — frequently asked questions
How many ksi are in a inches of water?
One inches of water equals 3.61273e-05 ksi. ksi = inH2O × 3.61273e-05
What is the formula to convert inches of water to ksi?
The formula is ksi = inH2O × 3.61273e-05. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert ksi back to inches of water?
Divide instead of multiplying: one ksi is 27679.9058214477 inH2O. 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 inches of water to ksi 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 inches of water to ksi.
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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