A torr is 1/760 standard atmosphere.
Torrs to Bars Converter — Torr to bar
Convert Torr (Torr) to Bar (bar) using the exact conversion factor (1 torr = 0.0013332237 bar). See the formula, worked examples, conversion table, history, and common uses.
Torrs to Bars converter
Converter
Scientific Units Converter
Convert SI derived units, scientific notation-friendly units, atomic units, and lab measurements.
Context values
Some unit families need one extra value for a physically accurate result.
A bar is exactly 100,000 pascals.
Result = input x 133.3223684 / 100000.
Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Torrs to Bars
Torr and Bar are both scientific-measurement units, spanning everything from atomic and laboratory scales to astronomical distances — the kind of conversion that comes up constantly in physics, chemistry, and astronomy when a result needs to move between conventions used in different subfields. Specifically: A torr is 1/760 standard atmosphere, and a bar is exactly 100,000 pascals.
Formula
bars = torrs × 0.00133322368421
This factor comes from each unit's defined relationship to the category's base unit: 1 torr equals 133.322368421 base units, and 1 bar equals 100000 base units, so dividing one by the other gives the direct torr-to-bar factor of 0.00133322368421.
Simple example
1 Torr × 0.001333223684 = 0.0013332237 bar
1 torr = 0.0013332237 bars.
Real-world example
10 Torr × 0.001333223684 = 0.0133322368 bar
10 torrs = 0.0133322368 bars.
Conversion table
| Torr (Torr) | Bar (bar) |
|---|---|
| 0.001 Torr | 0.0000013332 bar |
| 0.01 Torr | 0.0000133322 bar |
| 1 Torr | 0.0013332237 bar |
| 10 Torr | 0.0133322368 bar |
| 100 Torr | 0.1333223684 bar |
| 1,000 Torr | 1.333223684 bar |
Reverse conversion: Bar to Torr
0.0013332237 bar × 750.0616827 = 1.000000012 Torr
0.0013332237 bars = 1.000000012 torrs.
torrs = bars × 750.061682704
For a page dedicated to this direction, see Bar to Torr.
Understanding the Torr (Torr)
A torr is 1/760 standard atmosphere.
Understanding the Bar
Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.
Where it's used: Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure
Uses of the Bar today
- Tire pressure specifications outside the US
- Meteorology (weather maps commonly use millibars, hPa)
- Industrial and hydraulic pressure ratings in metric-system countries
History of the Bar
The bar was proposed by Norwegian meteorologist Vilhelm Bjerknes around 1906 as a convenient round pressure unit close to atmospheric pressure, derived from the CGS unit system (one bar equals one million dynes per square centimeter).
Though not an SI unit, the bar remains in wide practical use, particularly in meteorology (as the millibar, now more often written as the equivalent hectopascal) and in tire and hydraulic pressure specifications across most of the world.
Historical origin. Bar was not the invention of a single named person; it developed through the process described above.
Bar — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the bar among accepted non-SI pressure units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many bars are in 1 torr?
1 torr equals 0.0013332237 bars, using the exact defined conversion factor rather than an estimate.
How do I convert torr to bar?
Multiply the torr value by 0.001333223684. The converter above does this instantly to whatever precision you set.
How do I convert bar back to torr?
Use the reverse factor: 1 bar equals 750.0616827 torrs. You can also use the swap control in the converter above to flip the direction instantly.
What is a torr?
Torr (Torr) is a unit of scientific units.
What is a bar?
Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.
Is the torr to bar conversion exact?
Yes. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Why does this category span everything from atomic to astronomical scales?
Scientific work spans an enormous range of physical scales, from atomic distances (measured in angstroms or atomic mass units) to interstellar distances (measured in astronomical units or parsecs), so this category groups SI-derived and scale-specific units that researchers commonly need to convert between within their field.