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THE FEUTEX TOOLKIT

Inch water conventional to standard atmosphere

Convert inch water conventional (inH₂O) to standard atmosphere (atm) with adjustable precision, a worked example and a reference table.

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Converters workspace● Runs in your browser
01 Your input
02 Your result
YOUR RESULT
Ready when you are
Conversion formula(value × 249.08891 + 0 − 0) ÷ 101325

Reference table

inH₂Oatm
10.0024583164076
50.012291582038
100.024583164076
250.06145791019
500.12291582038
1000.24583164076

How the conversion works

The input is converted into Pa using the source factor and offset, then into standard atmosphere. This keeps unit definitions consistent across the pressure collection.

Definitions and sources

Factors are maintained in the versioned unit dataset. Output is rounded to your selected significant digits; calculation uses JavaScript double precision.

How to use this tool

  1. Enter a finite numeric value in inch water conventional.
  2. Choose the significant digits for your result.
  3. Copy or download the result, including its formula.

Try this example

10

Accuracy and scope

Gauge and absolute pressure cannot be interconverted without reference pressure. Water/mercury columns use conventional definitions, not an actual measured fluid column.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.