Inch of Water Column to Kilopascal Converter

Convert inches of water column to kilopascals with our free online pressure converter.

Quick Answer

1 Inch of Water Column = 0.249089 kilopascals

Formula: Inch of Water Column × conversion factor = Kilopascal

Use the calculator below for instant, accurate conversions.

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All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: November 2025|Reviewed by: Sam Mathew, Software Engineer

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How to Use the Inch of Water Column to Kilopascal Calculator:

Enter the value you want to convert in the 'From' field (Inch of Water Column).
The converted value in Kilopascal will appear automatically in the 'To' field.
Use the dropdown menus to select different units within the Pressure category.
Click the swap button (⇌) to reverse the conversion direction.

How to Convert Inch of Water Column to Kilopascal: Step-by-Step Guide

Converting Inch of Water Column to Kilopascal involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

kPa = inH₂O × 0.249089

Example Calculation:

1 inH₂O = 0.249089 kPa

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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Conversion Table: Inch of Water Column to Kilopascal

Inch of Water Column (inH₂O)	Kilopascal (kPa)
0.5	0.125
1	0.249
1.5	0.374
2	0.498
5	1.245
10	2.491
25	6.227
50	12.454
100	24.909
250	62.272
500	124.545
1,000	249.089

How do I convert Inch of Water Column to Kilopascal?

To convert Inch of Water Column to Kilopascal, enter the value in Inch of Water Column in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our pressure converter page to convert between other units in this category.

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What is the conversion factor from Inch of Water Column to Kilopascal?

The conversion factor depends on the specific relationship between Inch of Water Column and Kilopascal. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Kilopascal back to Inch of Water Column?

Yes! You can easily convert Kilopascal back to Inch of Water Column by using the swap button (⇌) in the calculator above, or by visiting our Kilopascal to Inch of Water Column converter page. You can also explore other pressure conversions on our category page.

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What are common uses for Inch of Water Column and Kilopascal?

Inch of Water Column and Kilopascal are both standard units used in pressure measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our pressure converter for more conversion options.

For more pressure conversion questions, visit our FAQ page or explore our conversion guides.