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 technical atmosphere?

Technical atmosphere (at) is a unit of pressure.

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.

PSI to Technical atmospheres Converter

Q: 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.

About Converting PSI to Technical atmospheres

PSI and Technical atmosphere both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. 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

35 psi × 0.07030695796 = 2.460743529 at

35 psi = 2.460743529 technical atmospheres.

Conversion table

PSI (psi)	Technical atmosphere (at)
1 psi	0.070306958 at
5 psi	0.3515347898 at
10 psi	0.7030695796 at
25 psi	1.757673949 at
50 psi	3.515347898 at
100 psi	7.030695796 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.

PSI to Technical atmospheres Converter — psi to at

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