inHg to mmHg converter
Convert inches of mercury (inHg) to millimetres of mercury (mmHg). 1 inHg = 25.4 mmHg.
Calculating…
Conversion factor
1 inHg = 25.4 mmHg · 1 mmHg = 0.0393701 inHg
inHg to mmHg table
| inHg | mmHg |
|---|---|
| 1 inHg | 25.4 mmHg |
| 2 inHg | 50.8 mmHg |
| 3 inHg | 76.2 mmHg |
| 4 inHg | 101.6 mmHg |
| 5 inHg | 127 mmHg |
| 6 inHg | 152.4 mmHg |
| 7 inHg | 177.8 mmHg |
| 8 inHg | 203.2 mmHg |
| 9 inHg | 228.6 mmHg |
| 10 inHg | 254 mmHg |
| 12 inHg | 304.8 mmHg |
| 14 inHg | 355.6 mmHg |
| 15 inHg | 381 mmHg |
| 16 inHg | 406.4 mmHg |
| 18 inHg | 457.2 mmHg |
| 20 inHg | 508 mmHg |
| 22 inHg | 558.8 mmHg |
| 24 inHg | 609.6 mmHg |
| 25 inHg | 635 mmHg |
| 26 inHg | 660.4 mmHg |
| 28 inHg | 711.2 mmHg |
| 29 inHg | 736.6 mmHg |
| 29.92 inHg | 759.968 mmHg |
| 30 inHg | 762 mmHg |
1 bar = 14.504 psi = 100 kPa = 29.53 inHg. Gauge pressure (barg, psig) is measured above atmospheric; absolute pressure (bara, psia) adds about 1.013 bar / 14.7 psi. This converter changes units only. For vacuum readings, use the vacuum converter.
inHg and mmHg values assume mercury at 0 °C; inH₂O uses water at 4 °C. Those are the conventional definitions used by most gauge makers.
inHg is often used for vacuum gauges, reading below atmosphere. If your gauge says "inHg vac", use the vacuum converter to get absolute pressure; this page converts the unit only.