Convert Inches of Water (60 °F) to Torr

Formula

Torr = inH₂O (60 °F) × 1.866453491241

Derivation from SI units:

• 1 inH₂O (60 °F) ≈ 999.0 kg/m³ × 9.80665 m/s² × 0.0254 m ≈ 248.84 Pa
• 1 Torr = 101325/760 Pa = 133.3223684 Pa (1/760 of a standard atmosphere)
• 1 inH₂O (60 °F) = 248.84 Pa ÷ 133.3223684211 Pa per Torr = 1.866453491241 Torr

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

Worked examples

1. A reading of 0.5 inH₂O (60 °F) converts to 0.9332267456 Torr.
   0.5 inH₂O (60 °F) × 1.866453491 = 0.9332267456 Torr
2. A value of 7 inH₂O (60 °F) is 13.06517444 Torr.
   7 inH₂O (60 °F) × 1.866453491 = 13.06517444 Torr

Where it's used

Inches of Water (60 °F) are used for older US gas-industry and flow-meter references, while torr appear in vacuum technology and vacuum gauges. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

Inch of Water (60 °F) to other pressure units

Frequently asked questions

Sources

• 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)".
• 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, "torr (Torr)".

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