A standard atmosphere is exactly 101,325 pascals.
Atmospheres to Technical atmospheres Converter — atm to at
Convert Atmosphere (atm) to Technical atmosphere (at) using the exact conversion factor (1 atmosphere = 1.033227453 technical atmosphere). See the formula, worked examples, conversion table, and common uses.
Atmospheres 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 101325 / 98066.5.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Atmospheres to Technical atmospheres
Atmosphere 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. Atmosphere is most often used for chemistry (standard conditions are often defined at 1 atm).
Formula
technical atmospheres = atmospheres × 1.0332274528
This factor comes from each unit's defined relationship to the category's base unit: 1 atmosphere equals 101325 base units, and 1 technical atmosphere equals 98066.5 base units, so dividing one by the other gives the direct atmosphere-to-technical atmosphere factor of 1.0332274528.
Simple example
1 atm × 1.033227453 = 1.033227453 at
1 atmosphere = 1.033227453 technical atmospheres.
Real-world example
100 atm × 1.033227453 = 103.3227453 at
100 atmospheres = 103.3227453 technical atmospheres.
Conversion table
| Atmosphere (atm) | Technical atmosphere (at) |
|---|---|
| 1 atm | 1.033227453 at |
| 10 atm | 10.33227453 at |
| 50 atm | 51.66137264 at |
| 100 atm | 103.3227453 at |
| 500 atm | 516.6137264 at |
| 1,000 atm | 1,033.227453 at |
Reverse conversion: Technical atmosphere to Atmosphere
1.033227453 at × 0.9678411054 = 1 atm
1.033227453 technical atmospheres = 1 atmospheres.
atmospheres = technical atmospheres × 0.967841105354
For a page dedicated to this direction, see Technical atmosphere to Atmosphere.
Understanding the Atmosphere
Atmosphere (atm) measures pressure. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. It is classified as a non-SI unit accepted for use with the SI.
Where it's used: Widely used internationally in chemistry, meteorology, and diving/aviation contexts alongside the pascal and bar
Uses of the Atmosphere today
- Chemistry (standard conditions are often defined at 1 atm)
- Diving and aviation pressure references
- General reference for everyday atmospheric pressure
Understanding the Technical atmosphere (at)
Technical atmosphere is kilogram-force per square centimeter.
Atmosphere — sources
- BIPM SI Brochure — Standard atmosphere listed among non-SI units with a fixed exact value in pascals.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many technical atmospheres are in 1 atmosphere?
1 atmosphere equals 1.033227453 technical atmospheres, using the exact defined conversion factor rather than an estimate.
How do I convert atmosphere to technical atmosphere?
Multiply the atmosphere value by 1.033227453. The converter above does this instantly to whatever precision you set.
How do I convert technical atmosphere back to atmosphere?
Use the reverse factor: 1 technical atmosphere equals 0.9678411054 atmospheres. You can also use the swap control in the converter above to flip the direction instantly.
What is a atmosphere?
Atmosphere (atm) measures pressure. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. It is classified as a non-SI unit accepted for use with the SI.
What is a technical atmosphere?
Technical atmosphere (at) is a unit of engineering.
Is the atmosphere to technical atmosphere conversion exact?
Yes. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. 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 atmosphere still used today?
Widely used internationally in chemistry, meteorology, and diving/aviation contexts alongside the pascal and bar
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.