How many bars is 1 mmHg?

1 millimeter of mercury (mmHg) equals approximately 0.00133322 bar. This comes from the definition: 1 mmHg = 133.322 Pa and 1 bar = 100,000 Pa, so 133.322 / 100,000 = 0.00133322 bar.

How do I convert mmHg to bar manually?

Multiply the mmHg value by 0.00133322. For example, 760 mmHg × 0.00133322 = 1.01325 bar (standard atmosphere). To convert bar back to mmHg, divide by 0.00133322 (or multiply by 750.062).

What is the difference between mmHg and bar?

Millimeter of mercury (mmHg) is a pressure unit based on the height of a mercury column — 1 mmHg is the pressure exerted by a 1 mm column of mercury at 0 °C under standard gravity (133.322 Pa). Bar is a metric unit equal to exactly 100,000 Pa. Standard atmospheric pressure is 760 mmHg = 1.01325 bar.

Is mmHg the same as Torr?

For most practical purposes, 1 mmHg ≈ 1 Torr. Strictly speaking, 1 Torr = 101,325/760 Pa ≈ 133.322 Pa, while 1 mmHg is defined via mercury density and gravity. The difference is less than 0.000016%, so they are interchangeable in all but the most precise scientific work.

What is standard atmospheric pressure in mmHg and bar?

Standard atmospheric pressure is defined as exactly 101,325 Pa, which equals 760 mmHg and 1.01325 bar. This is the baseline reference used in chemistry, meteorology, and engineering worldwide.

When is mmHg used instead of bar?

mmHg remains dominant in medicine (blood pressure, intraocular pressure), meteorology (barometric pressure in some regions), and vacuum technology. Bar is preferred in European industry, HVAC, and many scientific disciplines. Knowing how to convert between them is essential when reading mixed-unit datasheets or literature.

mmHg to Bars Converter

Name: mmHg to Bars Converter
Availability: InStock
Author: Nham Vu

Enter a pressure in mmHg and get the bar equivalent instantly, with reverse bar-to-mmHg conversion included.

Converter

Pressure in millimeters of mercury (mmHg)

Result in bars (bar)

Reverse: bars to mmHg

Pressure in bar

Result in mmHg

Reference Table

mmHg Bar

1 mmHg 0.00133322

10 mmHg 0.0133322

100 mmHg 0.133322

120 mmHg 0.159987

200 mmHg 0.266645

300 mmHg 0.399967

500 mmHg 0.666612

760 mmHg 1.01325

1000 mmHg 1.33322

1500 mmHg 1.99984

5000 mmHg 6.66612

10000 mmHg 13.3322

Formula: bar = mmHg × 0.00133322 • mmHg = bar ÷ 0.00133322

Summary

Enter a pressure in mmHg and get the bar equivalent instantly, with reverse bar-to-mmHg conversion included.

How it works

Enter the pressure value in mmHg in the top input field.
The bar result appears instantly with no button press needed.
Use the reverse field to convert bars back to mmHg.
Click "Copy" next to any result to copy the value to your clipboard.
Check the reference table for common mmHg-to-bar values at a glance.

Use cases

Convert blood pressure readings from mmHg to bar for engineering or research contexts.
Translate vacuum pump specifications from mmHg to bar for equipment compatibility.
Convert barometric pressure from mmHg to bar for weather data processing.
Cross-check mercury manometer readings against bar-based pressure gauges.
Convert laboratory vacuum pressures expressed in mmHg to bar for SI compliance.
Verify HVAC or refrigeration system pressures when switching between mmHg and bar.
Convert altitude-based pressure readings from mmHg to bar in atmospheric science.
Translate historical pressure data recorded in mmHg into modern bar units.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu