Convert Pascals to Inches of Water (60 °F)

Formula

inH₂O (60 °F) = Pa × 0.004018646519852

or inH₂O (60 °F) = Pa ÷ 248.84

Derivation from SI units:

• 1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻²
• 1 inH₂O (60 °F) ≈ 999.0 kg/m³ × 9.80665 m/s² × 0.0254 m ≈ 248.84 Pa

One unit is a measured value, so the factor is approximate. Pascal definition: pascal; Inch of Water (60 °F) definition: inch of water (60 °F).

Worked examples

1. A reading of 125 Pa converts to 0.502330815 inH₂O (60 °F).
   125 Pa × 0.00401864652 = 0.502330815 inH₂O (60 °F)
2. A value of 1000 Pa is 4.01864652 inH₂O (60 °F).
   1000 Pa × 0.00401864652 = 4.01864652 inH₂O (60 °F)

Where it's used

Pascals are used for cleanroom and isolator pressure differentials (typically 10–50 Pa), while inches of water (60 °F) appear in older US gas-industry and flow-meter references. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

Pascal to other pressure units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch of water (60 °F)".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.