EVAP / CONCEPT & EVIDENCE

EVAP pressure unit converter and reference

Compare readings in different units. Keep the vehicle specification, pressure reference and sensor calibration separate.

Dimensional conversion only. No allowable test pressure, vehicle pass/fail limit or sensor calibration is supplied.

GoTech · Source-attributed education · Technician review pending

Convert a pressure reading

Enter the signed value exactly as reported. Unit conversion does not select a safe test pressure.

1 inH₂O ≈ 0.249089 kPa

Calculated in this browser. The entered reading is not collected. Results are rounded to six significant digits.

Convert units without inventing a specification

The factors below follow NIST SP 811. The inches-of-water and inches-of-mercury units use the conventional definitions. This changes units only; it does not change a gauge reading into an absolute reading, reverse a vacuum sign convention, or turn a pressure into an FTP sensor voltage.

Convert units without inventing a specification — unit factors
UnitPascals per unit
Pa1
kPa1,000
psi6,894.757
inH₂O (conventional)249.0889
inHg (conventional)3,386.389

NIST SP 811 · conversion factors

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Keep the reference and sign with the reading

The converter preserves the sign you enter. Keep the instrument’s gauge, absolute or differential reference and its vacuum convention with the result. Converting between pressure references requires additional information; this tool does not do that.

There is no verified vehicle voltage table on this page. Use the sensor’s application-specific calibration to interpret its voltage.

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Sources, review and limits

Prepared by GoTech with AI assistance. Source wording and the bounded educational interpretation were checked in two reasoning passes by the same assistant. Technician review is pending; vehicle-specific service information and visual details have not been independently verified. Original source files remain unchanged.

Convert units without inventing a specification
Dimensional conversion only. No allowable test pressure, vehicle pass/fail limit or sensor calibration is supplied. NIST SP 811 · conversion factors
About older links to this guide

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