How many psi is 1 mmHg?

0.0193367774595 psi, which is 133.322387415 / 6,894.757293168. It scales straight up: 10 mmHg is 0.193367774595 psi, 50 mmHg is 0.966838872973 psi, 100 mmHg is 1.93367774595 psi, 500 mmHg is 9.66838872973 psi and 1,000 mmHg is 19.3367774595 psi. Answers print to twelve significant digits, so a small figure stays readable: 0.001 mmHg is 0.0000193367774595 psi.

What is the formula for mmHg to psi?

psi = original mmHg × 133.322387415 / 6,894.757293168, using exact conventional mmHg and the thirteen-significant-digit rounded psi coefficient. In reverse, mmHg = original psi × 6,894.757293168 / 133.322387415. The displayed reverse factor 51.7149252039 is rounded; using it as a multiplier or divisor can change final rounding. Swap units retains the typed scalar; outputs round beyond twelve significant digits.

Is 760 mmHg the same as 14.7 psi?

The converter displays 760 conventional mmHg as 14.6959508692 psi and 1 standard atmosphere as 14.6959487755 psi. Both round to 14.7 psi at three significant digits, but their stated quantities differ. The small difference derives from conventional mmHg versus torr; the psi coefficient also has a separately stated rounding. Rounded agreement at one precision does not make the original quantities equal.

Why is a torr not exactly a millimetre of mercury?

Torr is exactly 101,325/760 Pa, approximately 133.322368421 Pa, while conventional mmHg is exactly 133.322387415 Pa. The relative unit-size difference is about 1.4 parts in ten million; 760 conventional mmHg displays as 1.00000014247 atm. They remain distinct definitions, and whether a difference matters depends on the source quantity and required precision. Torr is absent from the menu.

Does it matter whether my figure is gauge or absolute pressure?

The converter preserves the supplied pressure reference and has no gauge-to-absolute mode. Absolute pressure is relative to vacuum; gauge pressure is relative to a supplied reference. To derive absolute pressure separately, supply the applicable ambient pressure and add the signed gauge quantity before converting. One standard atmosphere is a defined unit, not a measurement of current ambient pressure. In a separate hypothetical calculation, a supplied +300 mmHg gauge quantity and 760 mmHg ambient gives 1,060 mmHg absolute, displayed as 20.496984107 psi. A supplied 300 mmHg absolute instead displays as 5.80103323784 psi. The converter itself does not add the ambient quantity.

Can I convert inches of mercury or vacuum microns here?

Neither is in the menu. If the source explicitly supplies the same density/gravity mercury convention, 1 inHg = 25.4 conventional mmHg, displayed as 0.49115414747 psi. A separately supplied vacuum-micron definition of 0.001 torr is different from 0.001 conventional mmHg: derive its Pa directly as 101,325/760,000, then divide by the stored 6,894.757293168 Pa/psi. That gives about 0.0000193367747046 psi; 0.001 conventional mmHg instead displays as 0.0000193367774595 psi. A micron of length is a different dimension. The converter does not automatically resolve these external conventions.

Why does the list under the answer not repeat mmHg?

The list shows every other unit in the category and skips the one you are converting from, so here it reads pascals, kilopascals, bar, pounds per square inch and atmospheres. The readout strip also carries an Uncommon units switch labelled Show 1 more, because mmHg is filed as the one uncommon pressure unit. On this page turning it on changes nothing you can see: the unit it would add is the one already sitting in the From box.

Why does the page open on mmHg and psi when I last converted something else?

This focused page opens on Millimeter of mercury and Pound per square inch, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.

mmHg to PSI Converter

The unit definitions are stated, while the stored psi coefficient is rounded to thirteen significant digits. The conventional millimetre of mercury is exactly 133.322387415 pascals, a millimetre of mercury at a density of 13,595.1 kg/m³ under a standard gravity of 9.80665 m/s², and one pound per square inch is a pound force of 4.4482216152605 N spread over 0.00064516 m², which is 6,894.757293168 pascals to the thirteen digits this table carries. So psi = mmHg × 133.322387415 / 6,894.757293168, using the stored coefficients; division by the rounded reverse factor 51.7149252039 only approximates it. That makes 1 mmHg 0.0193367774595 psi, 50 mmHg 0.966838872973 psi, 100 mmHg 1.93367774595 psi, 300 mmHg 5.80103323784 psi, 750 mmHg 14.5025830946 psi and 760 mmHg 14.6959508692 psi. This page opens the converter with mmHg in the From box and Pound per square inch (psi) in the To box, ahead of whatever pair you converted last, and the list under the answer carries the same pressure in pascals, kilopascals, bar and atmospheres, so 760 mmHg reads 101,325.014435 Pa, 101.325014435 kPa, 1.01325014435 bar and 1.00000014247 atm beside its 14.6959508692 psi. The unit turns up on vacuum gauges, barometers and clinical monitors, and converting it changes the units on a number without changing what that number describes.

From

To0.0193367774595

Category: Pressure

Base unit: pascal

Uncommon units: Show 1 more

One standard atmosphere is 101,325 Pa. mmHg is the conventional 133.322387415 Pa, distinct from the torr (exactly 101,325/760 Pa). The psi coefficient is rounded to 6,894.757293168 Pa. Converting units preserves gauge or absolute reference; it does not add ambient pressure.

Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.

1 mmHg in every pressure unit

PascalPa
133.322387415
KilopascalkPa
0.133322387415
Barbar
0.00133322387415
Pound per square inchpsi
0.0193367774595
Atmosphereatm
0.00131578966114

Selectable complete conversion

Unit Converter — Pressure
Input: 1 (Millimeter of mercury, mmHg)
Result: 0.0193367774595 psi (Pound per square inch)
Displayed values round to 12 significant digits.
One standard atmosphere is 101,325 Pa. mmHg is the conventional 133.322387415 Pa, distinct from the torr (exactly 101,325/760 Pa). The psi coefficient is rounded to 6,894.757293168 Pa. Converting units preserves gauge or absolute reference; it does not add ambient pressure.
All other units:
Pascal (Pa): 133.322387415
Kilopascal (kPa): 0.133322387415
Bar (bar): 0.00133322387415
Pound per square inch (psi): 0.0193367774595
Atmosphere (atm): 0.00131578966114

Common questions

How many psi is 1 mmHg?: 0.0193367774595 psi, which is 133.322387415 / 6,894.757293168. It scales straight up: 10 mmHg is 0.193367774595 psi, 50 mmHg is 0.966838872973 psi, 100 mmHg is 1.93367774595 psi, 500 mmHg is 9.66838872973 psi and 1,000 mmHg is 19.3367774595 psi. Answers print to twelve significant digits, so a small figure stays readable: 0.001 mmHg is 0.0000193367774595 psi.
What is the formula for mmHg to psi?: psi = original mmHg × 133.322387415 / 6,894.757293168, using exact conventional mmHg and the thirteen-significant-digit rounded psi coefficient. In reverse, mmHg = original psi × 6,894.757293168 / 133.322387415. The displayed reverse factor 51.7149252039 is rounded; using it as a multiplier or divisor can change final rounding. Swap units retains the typed scalar; outputs round beyond twelve significant digits.
Is 760 mmHg the same as 14.7 psi?: The converter displays 760 conventional mmHg as 14.6959508692 psi and 1 standard atmosphere as 14.6959487755 psi. Both round to 14.7 psi at three significant digits, but their stated quantities differ. The small difference derives from conventional mmHg versus torr; the psi coefficient also has a separately stated rounding. Rounded agreement at one precision does not make the original quantities equal.
Why is a torr not exactly a millimetre of mercury?: Torr is exactly 101,325/760 Pa, approximately 133.322368421 Pa, while conventional mmHg is exactly 133.322387415 Pa. The relative unit-size difference is about 1.4 parts in ten million; 760 conventional mmHg displays as 1.00000014247 atm. They remain distinct definitions, and whether a difference matters depends on the source quantity and required precision. Torr is absent from the menu.
Does it matter whether my figure is gauge or absolute pressure?: The converter preserves the supplied pressure reference and has no gauge-to-absolute mode. Absolute pressure is relative to vacuum; gauge pressure is relative to a supplied reference. To derive absolute pressure separately, supply the applicable ambient pressure and add the signed gauge quantity before converting. One standard atmosphere is a defined unit, not a measurement of current ambient pressure. In a separate hypothetical calculation, a supplied +300 mmHg gauge quantity and 760 mmHg ambient gives 1,060 mmHg absolute, displayed as 20.496984107 psi. A supplied 300 mmHg absolute instead displays as 5.80103323784 psi. The converter itself does not add the ambient quantity.
Can I convert inches of mercury or vacuum microns here?: Neither is in the menu. If the source explicitly supplies the same density/gravity mercury convention, 1 inHg = 25.4 conventional mmHg, displayed as 0.49115414747 psi. A separately supplied vacuum-micron definition of 0.001 torr is different from 0.001 conventional mmHg: derive its Pa directly as 101,325/760,000, then divide by the stored 6,894.757293168 Pa/psi. That gives about 0.0000193367747046 psi; 0.001 conventional mmHg instead displays as 0.0000193367774595 psi. A micron of length is a different dimension. The converter does not automatically resolve these external conventions.
Why does the list under the answer not repeat mmHg?: The list shows every other unit in the category and skips the one you are converting from, so here it reads pascals, kilopascals, bar, pounds per square inch and atmospheres. The readout strip also carries an Uncommon units switch labelled Show 1 more, because mmHg is filed as the one uncommon pressure unit. On this page turning it on changes nothing you can see: the unit it would add is the one already sitting in the From box.
Why does the page open on mmHg and psi when I last converted something else?: This focused page opens on Millimeter of mercury and Pound per square inch, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.

Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.