inHg to PSI Converter
Pressure · unit-converter
Convert inHg to PSI with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through pascal with fixed definitions (standard atmosphere = 101,325 Pa; torr and mmHg = atm/760; plus industrial/manometer units like kgf/cm², inHg, inH2O, and mmH2O).
About inHg
Inches of mercury (inHg) is used in aviation altimetry and vacuum readings in some US contexts.
About PSI
Pounds-force per square inch (PSI) is common for tires, hydraulics, and US industrial equipment.
How to convert inch of mercury (inhg) to psi
1 inhg equals 0.4911540774967619 psi in this tool (via pascal):
1 inhg = (3386.38815789 Pa ÷ 6894.757293168 Pa) psi = 0.4911540774967619 psi
Each inhg carries 3386.38815789 Pa and each psi 6894.757293168 Pa, so one inhg equals 3386.38815789 ÷ 6894.757293168 psi.
Let p(inhg) be pressure in inHg (inhg), and p(psi) in PSI (psi). Then:
p(psi) = p(inhg) × (3386.38815789 / 6894.757293168)
Equivalently, divide by how many inhg fit into one psi (Pa per psi divided by Pa per inhg):
p(psi) = p(inhg) ÷ 2.0360209673849097
Examples
Example #1: Convert 1 inhg to psi
1 inhg = 1 inhg × (3386.38815789/6894.757293168) psi = 0.4911540775 psi
1 inhg = 1 inhg ÷ 2.0360209673849097 = 0.4911540775 psi
1 inhg × (3,386.38815789/6,894.757293168) = 0.491154 psi
Example #2: Convert 10 inhg to psi
10 inhg = 10 inhg × (3386.38815789/6894.757293168) psi = 4.911540775 psi
10 inhg = 10 inhg ÷ 2.0360209673849097 = 4.911540775 psi
10 inhg × (3,386.38815789/6,894.757293168) = 4.911541 psi
Summary
To convert inHg to PSI, multiply the value in inhg by (3386.38815789 Pa per inhg) / (6894.757293168 Pa per psi). Equivalently: value_psi = value_inhg × (3386.38815789 / 6894.757293168). Numerically, 1 inhg equals 0.4911540774967619 psi.
Relationship context
Both inHg and PSI are converted by fixed multiples of the pascal. Multiplying by (Pa per inhg) ÷ (Pa per psi) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| inHg (inhg) | PSI (psi) |
|---|---|
| 0.1 | 0.0491154077 |
| 1 | 0.4911540775 |
| 2 | 0.982308155 |
| 3 | 1.4734622325 |
| 4 | 1.96461631 |
| 5 | 2.4557703875 |
| 6 | 2.946924465 |
| 7 | 3.4380785425 |
| 8 | 3.92923262 |
| 9 | 4.4203866975 |
| inHg (inhg) | PSI (psi) |
|---|---|
| 10 | 4.911540775 |
| 20 | 9.8230815499 |
| 30 | 14.7346223249 |
| 40 | 19.6461630999 |
| 50 | 24.5577038748 |
| 60 | 29.4692446498 |
| 70 | 34.3807854248 |
| 80 | 39.2923261997 |
| 90 | 44.2038669747 |
| 100 | 49.1154077497 |