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Inches of Water to Pascal Converter

inH₂O → Pa: type a value and the result appears instantly.

1 inH₂O = 249.08891 Pa
1 Pa = 0.00401463076 inH₂O
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How to convert inches of water to pascal

Use this formula:

Pa = inH₂O × 249.08891

Examples

inH₂O to Pa conversion chart

inches of water (inH₂O)pascal (Pa)
0.1 inH₂O24.9089 Pa
0.25 inH₂O62.2722 Pa
0.5 inH₂O124.544 Pa
1 inH₂O249.089 Pa
2 inH₂O498.178 Pa
3 inH₂O747.267 Pa
4 inH₂O996.356 Pa
5 inH₂O1,245.44 Pa
6 inH₂O1,494.53 Pa
7 inH₂O1,743.62 Pa
8 inH₂O1,992.71 Pa
9 inH₂O2,241.8 Pa
10 inH₂O2,490.89 Pa
12 inH₂O2,989.07 Pa
15 inH₂O3,736.33 Pa
20 inH₂O4,981.78 Pa
25 inH₂O6,227.22 Pa
30 inH₂O7,472.67 Pa
40 inH₂O9,963.56 Pa
50 inH₂O12,454.4 Pa
60 inH₂O14,945.3 Pa
70 inH₂O17,436.2 Pa
75 inH₂O18,681.7 Pa
80 inH₂O19,927.1 Pa
90 inH₂O22,418 Pa
100 inH₂O24,908.9 Pa
150 inH₂O37,363.3 Pa
200 inH₂O49,817.8 Pa
250 inH₂O62,272.2 Pa
500 inH₂O124,544 Pa
1,000 inH₂O249,089 Pa

About the units

Inch of water (inH₂O) is a US customary / imperial unit. 1 inH₂O = 249.08891 Pa.

Pascal (Pa) is a metric (SI) unit. 1 Pa = 0.01 hPa.

Frequently asked questions

How do I convert inches of water to pascal?
Multiply the value in inH₂O by 249.08891.
How many pascal are in 1 inch of water?
1 inH₂O = 249.08891 Pa.
What is 12 inH₂O in Pa?
12 inH₂O = 2,989.07 Pa.
How do I convert pascal to inches of water?
Use the reverse converter: Pa → inH₂O.

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Sources: NIST SP 811 · BIPM SI Brochure · NIST Handbook 44. Last reviewed: 2026-10 · FreeUnitConverters