A bar is exactly 100,000 pascals.
Bars to Technical atmospheres Converter — bar to at
Convert Bar (bar) to Technical atmosphere (at) using the exact conversion factor (1 bar = 1.019716213 technical atmosphere). See the formula, worked examples, conversion table, history, and common uses.
Bars to Technical atmospheres converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Technical atmosphere is kilogram-force per square centimeter.
Result = input x 100000 / 98066.5.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Bars to Technical atmospheres
Bar and Technical atmosphere both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Bar is most often used for tire pressure specifications outside the us.
Formula
technical atmospheres = bars × 1.01971621298
This factor comes from each unit's defined relationship to the category's base unit: 1 bar equals 100000 base units, and 1 technical atmosphere equals 98066.5 base units, so dividing one by the other gives the direct bar-to-technical atmosphere factor of 1.01971621298.
Simple example
1 bar × 1.019716213 = 1.019716213 at
1 bar = 1.019716213 technical atmospheres.
Real-world example
100 bar × 1.019716213 = 101.9716213 at
100 bars = 101.9716213 technical atmospheres.
Conversion table
| Bar (bar) | Technical atmosphere (at) |
|---|---|
| 1 bar | 1.019716213 at |
| 10 bar | 10.19716213 at |
| 50 bar | 50.98581065 at |
| 100 bar | 101.9716213 at |
| 500 bar | 509.8581065 at |
| 1,000 bar | 1,019.716213 at |
Reverse conversion: Technical atmosphere to Bar
1.019716213 at × 0.980665 = 1 bar
1.019716213 technical atmospheres = 1 bars.
bars = technical atmospheres × 0.980665
For a page dedicated to this direction, see Technical atmosphere to Bar.
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.
Understanding the Technical atmosphere (at)
Technical atmosphere is kilogram-force per square centimeter.
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 technical atmospheres are in 1 bar?
1 bar equals 1.019716213 technical atmospheres, using the exact defined conversion factor rather than an estimate.
How do I convert bar to technical atmosphere?
Multiply the bar value by 1.019716213. The converter above does this instantly to whatever precision you set.
How do I convert technical atmosphere back to bar?
Use the reverse factor: 1 technical atmosphere equals 0.980665 bars. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a technical atmosphere?
Technical atmosphere (at) is a unit of engineering.
Is the bar to technical atmosphere 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.
Where is the bar still used today?
Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.