Unit definitions

Millimeters of mercury

mmHg is the global standard for measuring blood pressure. $P = \rho \cdot g \cdot h$ can be used to calculate the hydrostatic pressure exerted by a fluid. $$P = \rho \cdot g \cdot h$$ $\rho \approx 13\,595.1\ \text{kg/m}^3$ at $0^\circ\text{C}$ $$g = 9.806\,65\ \text{m/s}^2$$ $$h = 0.001\ \text{m}$$ $$1\ \text{mmHg} \approx 133.322\ \text{Pa}$$

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 Millimeters of mercury to Inches of mercury

$$\text{Pressure}_{\text{inHg}} = \text{Pressure}_{\text{mmHg}} \cdot 0.03937007874015748031496062992125984$$

Examples

Example 1

Convert $35.0\ \text{mmHg}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 35.0 \cdot 0.03937007874015748031496062992125984$$

$$\text{Pressure}_{\text{inHg}} = 1.377953$$

$$\therefore \ 35.0\ \text{mmHg} = 1.377953 \ \text{inHg}$$

Example 2

Convert $75.0\ \text{mmHg}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 75.0 \cdot 0.03937007874015748031496062992125984$$

$$\text{Pressure}_{\text{inHg}} = 2.952756$$

$$\therefore \ 75.0\ \text{mmHg} = 2.952756 \ \text{inHg}$$

Example 3

Convert $120.0\ \text{mmHg}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 120.0 \cdot 0.03937007874015748031496062992125984$$

$$\text{Pressure}_{\text{inHg}} = 4.724409$$

$$\therefore \ 120.0\ \text{mmHg} = 4.724409 \ \text{inHg}$$

Example 4

Convert $140.0\ \text{mmHg}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 140.0 \cdot 0.03937007874015748031496062992125984$$

$$\text{Pressure}_{\text{inHg}} = 5.511811$$

$$\therefore \ 140.0\ \text{mmHg} = 5.511811 \ \text{inHg}$$

Example 5

Convert $190.0\ \text{mmHg}$ to $\text{inHg}$.

$$\text{Pressure}_{\text{inHg}} = 190.0 \cdot 0.03937007874015748031496062992125984$$

$$\text{Pressure}_{\text{inHg}} = 7.480315$$

$$\therefore \ 190.0\ \text{mmHg} = 7.480315 \ \text{inHg}$$

Millimeters of mercury to Inches of mercury conversion table

Millimeters of mercury to Inches of mercury conversion table

Millimeters of mercury [mmHg]	Inches of mercury [inHg]
1	0.03937
2	0.07874
3	0.11811
4	0.15748
5	0.19685
6	0.23622
7	0.275591
8	0.314961
9	0.354331
10	0.393701

Convert Millimeters of mercury to other Pressure units

Convert Millimeters of mercury to other Pressure units

Millimeters of mercury [mmHg]	Other unit
1	133.322368 Pascal [Pa]
1	0.133322 Kilopascal [kPa]
1	0.019337 Pounds per square inch [psi]