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Inch of mercury to Millimeter of mercury (inHg → mmHg)

Convert inch of mercury to millimeter of mercury instantly. The conversion factor is approximate to engineering precision.

Realtime·pressure·imperial
Approx
inHg
× 25.4
mmHg
25.4
Precision [auto]
6

📐inHg to mmHg formulaApprox.

mmHg = inHg × 25.400002697664
Inverse: inHg = mmHg × 0.039370074559

Worked example: 1 inHg = 25.400002697664 mmHg

ℹ️About these units

Inch of mercury (inHg)
US weather barometric pressure.
Millimeter of mercury (mmHg)
Blood pressure measurement.

📊Reference table: inHg → mmHg

Inch of mercury (inHg)Millimeter of mercury (mmHg)
125.4
250.8
5127
10254
15381
20508.0001
25635.0001
501,270
1002,540
2506,350
50012,700
75019,050
1,00025,400

Want a downloadable CSV? Append ?format=csv to the API /api/v1/table endpoint.

🔁Reverse & related

Reverse: mmHg → inHginHg → PainHg → kPainHg → MPainHg → hPainHg → barinHg → mbarinHg → psiinHg → ksi

🔌API & widget

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