Millimeter of mercury to Standard atmosphere Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert millimeters of mercury [mmHg, Torr] to standard atmospheres [atm] or standard atmospheres [atm] to millimeters of mercury [mmHg, Torr]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert millimeters of mercury to standard atmospheres
There are two simple ways to convert millimeters of mercury [mmHg, Torr] to standard atmospheres [atm]. In the first calculation method, the value in millimeters of mercury [mmHg, Torr] is divided by 760. The second method multiplies the value in millimeters of mercury [mmHg, Torr] by the rounded conversion factor of 0.0013.
- Standard atmospheres [atm] = millimeters of mercury [mmHg, Torr] ÷ 760
- Standard atmospheres [atm] ≈ millimeters of mercury [mmHg, Torr] * 0.0013
The calculation method with a rounded conversion value is more suitable for rough conversions from millimeters of mercury [mmHg, Torr] to standard atmospheres [atm], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert standard atmospheres to millimeters of mercury
Converting standard atmospheres [atm] to millimeters of mercury [mmHg, Torr] is easy and can be done in two ways. The first method involves multiplication, whereby the value in standard atmospheres [atm] is multiplied by 760. The second variant is a division. Here, the value in standard atmospheres [atm] is divided by the rounded conversion factor of 0.0013.
- Millimeters of mercury [mmHg, Torr] = standard atmospheres [atm] * 760
- Millimeters of mercury [mmHg, Torr] ≈ standard atmospheres [atm] ÷ 0.0013
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from standard atmospheres [atm] to millimeters of mercury [mmHg, Torr] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
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