Convert Inches of Mercury to Bars
Convert Inches of Mercury (inHg) to Bars (bar) instantly and accurately.
Conversion Formula
bar = inHg × 0.0338638864
About Inches of Mercury
One inch of mercury (inHg) ≈ 3,386 Pa - the primary barometric pressure unit in US aviation and meteorology. ASOS weather stations, METARs, and altimeter settings in the US report in inHg. Standard sea-level pressure is 29.92 inHg. Altimeters are set to local QNH in inHg to maintain altitude reference. US barometers for home weather stations display inHg. Typical pressure range: 28.5-31.0 inHg in continental weather systems. Record low: ~25.70 inHg (Typhoon Tip, 1979). 1 inHg = 3,386.39 Pa.
About Bars
A bar = exactly 100,000 Pa ≈ 0.987 atm - the world standard for industrial pressure outside North America. Hydraulic systems, pneumatic equipment, gas cylinders, dive computers, and tyre gauges in Europe and Asia use bar. Scuba diving: +1 bar per 10 m depth; at 40 m recreational limit = 5 bar absolute. European tyre pressure labels show bar alongside kPa. Industrial processes: steam at 10-50 bar; high-pressure reactors 100-300 bar; water-jet cutting 1,000-4,000 bar. 1 bar = 100,000 Pa = 14.504 psi.
Quick Reference Table
| Inches of Mercury (inHg) | Bars (bar) |
|---|---|
| 1 inHg | 0.0338639 bar |
| 2 inHg | 0.0677278 bar |
| 5 inHg | 0.169319 bar |
| 10 inHg | 0.338639 bar |
| 25 inHg | 0.846597 bar |
| 50 inHg | 1.69319 bar |
| 100 inHg | 3.38639 bar |