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Pressure

inH₂Otoksi

Convert inches of water column (4 °C) (inH₂O) to kilopounds-force per square inch (ksi).

Factor1 inH₂O = 3.612729e-5 ksi

Converter

inH₂O

Accepts numbers or expressions, e.g. 150 + 14.7

Result
0.361273ksi

Rendered to 6 significant figures.

Formula

Formula
ksi = inH₂O × 3.612729e-5

Multiply any value in inches of water column (4 °C) by 3.612729e-5 to obtain the value in kilopounds-force per square inch.

Worked example

Convert 10000 inH₂O to ksi.

  1. 01Start with 10000 inH₂O.
  2. 02Multiply by the conversion factor: 10000 × 3.612729e-5 = 0.361273 ksi.
Result10000 inH₂O = 0.361273 ksi

Conversion table

inH₂Oksi
13.6127e-5
27.2255e-5
50.00018064
100.00036127
200.00072255
500.0018064
1000.0036127
2000.0072255
5000.018064
10000.036127

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from inH₂O to ksi?
1 inH₂O equals 3.612729e-5 ksi. To convert, multiply the value in inches of water column (4 °C) by 3.612729e-5.
How do I convert 1 inH₂O to ksi?
1 inH₂O = 3.61273e-5 ksi. For any value, multiply by 3.612729e-5.
How do I convert ksi back to inH₂O?
Divide by the same factor — or equivalently, multiply by 27679.9. So 1 ksi = 27679.9 inH₂O.
When would I need to convert inch of water column (4 °C) to kilopound-force per square inch?
Pressure conversions between inH₂O and ksi are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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