Convert Millimeters of Mercury to Baryes

Formula

Ba = mmHg × 1333.22387415

Derivation from SI units:

• 1 mmHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.001 m = 133.322387415 Pa
• 1 Ba = 1 dyn/cm² = 10⁻⁵ N ÷ 10⁻⁴ m² = 0.1 Pa
• 1 mmHg = 133.322387415 Pa ÷ 0.1 Pa per Ba = 1333.22387415 Ba

Both units are defined exactly, so the factor is exact. Millimeter of Mercury definition: millimeter of mercury; Barye definition: barye.

Worked examples

1. A reading of 80 mmHg converts to 106657.9099 Ba.
   80 mmHg × 1333.223874 = 106657.9099 Ba
2. A value of 160 mmHg is 213315.8199 Ba.
   160 mmHg × 1333.223874 = 213315.8199 Ba

Where it's used

Millimeters of Mercury are used for blood pressure (e.g. 120/80 mmHg), while baryes appear in older physics and acoustics literature. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

Millimeter of Mercury 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, "millimeter of mercury, conventional (mmHg)".
• 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, "dyne per square centimeter (dyn/cm²)".

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