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About this tool
Convert inches of mercury to atmospheres instantly. Free, bidirectional, and fully in-browser.
1 inch of mercury equals 0.03342106094 atmospheres — enter any inch of mercury value to convert it to atmospheres instantly. This Inch of mercury to Atmosphere converter is a client-side tool: it applies a single multiplication (atm = inHg × 0.03342106094) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert atmospheres back to inches of mercury. A reference table lists common inch of mercury values already converted, and nothing you enter is sent to a server.
Open Inch of mercury to Atmosphere Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Inch of mercury field.
Read the equivalent in atmospheres in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert atmospheres to inches of mercury.
The result updates as you type, and the swap button flips the conversion to atmosphere → inch of mercury without reloading.
The conversion uses the precise factor (atm = inHg × 0.03342106094), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One inch of mercury is 0.03342106094 atmospheres. Multiply the inch of mercury value by 0.03342106094 to convert. For example, 10 inHg = 0.3342106094 atm.
atm = inHg × 0.03342106094. This tool applies it automatically and shows a worked example: 10 inHg = 0.3342106094 atm.
Yes. Press the swap button, or type into the atmosphere field, and the tool converts atmospheres to inches of mercury using the inverse of the same relationship.
It uses the standard pressure definition (atm = inHg × 0.03342106094), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Inch of mercury to Atmosphere Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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