Pounds per square inch.
PSI to Technical atmospheres Converter — psi to at
Convert PSI (psi) to Technical atmosphere (at) using the exact conversion factor (1 psi = 0.070306958 technical atmosphere). See the formula, worked examples, conversion table, history, and common uses.
PSI 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 6894.757293 / 98066.5.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting PSI to Technical atmospheres
PSI 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. PSI is most often used for tire pressure specifications in the us.
Formula
technical atmospheres = psi × 0.0703069579639
This factor comes from each unit's defined relationship to the category's base unit: 1 psi equals 6894.75729317 base units, and 1 technical atmosphere equals 98066.5 base units, so dividing one by the other gives the direct psi-to-technical atmosphere factor of 0.0703069579639.
Simple example
1 psi × 0.07030695796 = 0.070306958 at
1 psi = 0.070306958 technical atmospheres.
Real-world example
100 psi × 0.07030695796 = 7.030695796 at
100 psi = 7.030695796 technical atmospheres.
Conversion table
| PSI (psi) | Technical atmosphere (at) |
|---|---|
| 1 psi | 0.070306958 at |
| 10 psi | 0.7030695796 at |
| 50 psi | 3.515347898 at |
| 100 psi | 7.030695796 at |
| 500 psi | 35.15347898 at |
| 1,000 psi | 70.30695796 at |
Reverse conversion: Technical atmosphere to PSI
0.070306958 at × 14.22334331 = 1.000000001 psi
0.070306958 technical atmospheres = 1.000000001 psi.
psi = technical atmospheres × 14.2233433071
For a page dedicated to this direction, see Technical atmosphere to PSI.
Understanding the PSI
PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.
Where it's used: United States (standard pressure unit for tires, tools, and plumbing)
Uses of the PSI today
- Tire pressure specifications in the US
- Hydraulic and pneumatic system ratings
- Plumbing, compressed-air tools, and industrial equipment ratings
History of the PSI
PSI is a derived unit from the pound-force and the inch, both themselves standardized through English and later international agreements rather than invented as a pressure unit from scratch.
It became the default pressure unit in US engineering as pound-force and inch-based measurement dominated American industry through the 19th and 20th centuries, and it remains in everyday use for tires and tools even as most other measurements in the US context stay imperial.
Historical origin. PSI 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.
PSI — sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units — Documents conversion factors for psi and other US customary pressure units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many technical atmospheres are in 1 psi?
1 psi equals 0.070306958 technical atmospheres, using the exact defined conversion factor rather than an estimate.
How do I convert psi to technical atmosphere?
Multiply the psi value by 0.07030695796. The converter above does this instantly to whatever precision you set.
How do I convert technical atmosphere back to psi?
Use the reverse factor: 1 technical atmosphere equals 14.22334331 psi. You can also use the swap control in the converter above to flip the direction instantly.
What is a psi?
PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.
What is a technical atmosphere?
Technical atmosphere (at) is a unit of engineering.
Is the psi to technical atmosphere conversion exact?
Yes. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. 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 psi still used today?
United States (standard pressure unit for tires, tools, and plumbing)
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.