Inches of Water to Millibars
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inH2O
mbar
Quick reference
| Inches of Water (inH2O) | Millibars (mbar) |
|---|
Formula
Millibars = inches of water × 2.49089
Multiply the inches of water value by 2.49089 to get millibars. To reverse — divide millibars by 2.49089 to get inches of water.
About this conversion
Inches of water column (inH₂O) is used in HVAC and low-pressure measurement, equal to approximately 249 pascals. Learn more →
The millibar (mbar) equals one thousandth of a bar, widely used in meteorology and weather forecasting. Learn more →
Source: NIST International Reference