hectopascal to inch of mercury Converter
Convert hPa to inHg and back with a live reference table.
1 hPa = 0.02953 inHg\n5 hPa = 0.14765 inHg\n10 hPa = 0.2953 inHg\n25 hPa = 0.73825 inHg\n50 hPa = 1.4765 inHg\n100 hPa = 2.953 inHg
Why this conversion matters
Weather pressure is often in hPa or millibars, while US forecasts often show inches of mercury. The widget keeps the direction explicit so you can enter either side of the pair without doing the reciprocal by hand. It is built for quick checks where a calculator, specification sheet, recipe, map, or lab note uses the other unit.
For the default example, 1013.25 hPa converts to 29.9213 inHg. Switching the direction shows the inverse relationship, so 29.9213 inHg converts back to 1013.25 hPa with the same factor.
Formula and privacy note
The calculation uses 1 hPa = 0.02953 inHg. Forward conversion multiplies by that factor, and reverse conversion divides by it. Results are rounded to six significant figures for readable estimates, so very small scientific units and large planning units stay scannable. Check the unit labels before copying a result, especially when similar abbreviations appear in the same project. The reference table is generated from the same constant, and everything runs locally in your browser.
Frequently Asked Questions
What factor does this converter use?
It uses the standard factor 1 hPa = 0.02953 inHg, then applies the reciprocal for the reverse direction.
Why are results rounded?
The main result is rounded to six significant figures so very large and very small values stay readable while preserving the useful precision for quick checks.
Can I convert both directions?
Yes. Choose hPa to inHg or inHg to hPa from the direction menu and the output updates immediately.
Is this converter private?
Yes. The conversion runs entirely in your browser, and the value you enter is not uploaded or stored.
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