Unit definitions

Pounds per square inch

One psi equals one pound (avoirdupois) force applied to an area of one square inch. Pound force can be derived as follows. $$F = m \cdot a$$ $$a = g = 9.806\,65\ \text{m/s}^2$$ $$m = 1\ \text{lb}$$ $$1\ \text{lb} = 0.453\,592\,37\ \text{kg}$$ $$1\ \text{lbf} = 0.453\,592\,37 \ \text{kg} \times 9.806\,65 \ \text{m/s}^2$$ $$1\ \text{lbf} \approx 4.448\,222 \ \text{N}$$ After dividing by the area of one square inch, we get the following. $$1\ \text{psi} = \frac{1\ \text{lbf}}{1\ \text{in}^2}$$ $$1\ \text{in}^2 = 0.000\,645\,16\ \text{m}^2$$ $$1\ \text{psi} \approx 6\,894.76\ \text{Pa}$$

Inches of mercury

Pressure in inHg can be calculated using $P = \rho \cdot g \cdot h$. $$1\ \text{inHg} \approx 3\,386.39\ \text{Pa}$$

How to convert Pounds per square inch to Inches of mercury

$$\text{Pressure}_{\text{inHg}} = \text{Pressure}_{\text{psi}} \cdot 2.036020967382168400935335862212937$$

Examples

Example 1

Convert $30.0\ \text{psi}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 30.0 \cdot 2.036020967382168400935335862212937$$

$$\text{Pressure}_{\text{inHg}} = 61.080629$$

$$\therefore \ 30.0\ \text{psi} = 61.080629 \ \text{inHg}$$

Example 2

Convert $85.0\ \text{psi}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 85.0 \cdot 2.036020967382168400935335862212937$$

$$\text{Pressure}_{\text{inHg}} = 173.061782$$

$$\therefore \ 85.0\ \text{psi} = 173.061782 \ \text{inHg}$$

Example 3

Convert $105.0\ \text{psi}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 105.0 \cdot 2.036020967382168400935335862212937$$

$$\text{Pressure}_{\text{inHg}} = 213.782202$$

$$\therefore \ 105.0\ \text{psi} = 213.782202 \ \text{inHg}$$

Example 4

Convert $150.0\ \text{psi}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 150.0 \cdot 2.036020967382168400935335862212937$$

$$\text{Pressure}_{\text{inHg}} = 305.403145$$

$$\therefore \ 150.0\ \text{psi} = 305.403145 \ \text{inHg}$$

Example 5

Convert $160.0\ \text{psi}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 160.0 \cdot 2.036020967382168400935335862212937$$

$$\text{Pressure}_{\text{inHg}} = 325.763355$$

$$\therefore \ 160.0\ \text{psi} = 325.763355 \ \text{inHg}$$

Pounds per square inch to Inches of mercury conversion table

Pounds per square inch to Inches of mercury conversion table

Pounds per square inch [psi]	Inches of mercury [inHg]
1	2.036021
2	4.072042
3	6.108063
4	8.144084
5	10.180105
6	12.216126
7	14.252147
8	16.288168
9	18.324189
10	20.36021

Convert Pounds per square inch to other Pressure units

Convert Pounds per square inch to other Pressure units

Pounds per square inch [psi]	Other unit
1	6894.757293 Pascal [Pa]
1	6.894757 Kilopascal [kPa]
1	51.714933 Millimeters of mercury [mmHg]