Technical Atmosphere To Pound Force Per Square Inch Converter

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Last reviewed: December 08, 2025

Conversion Factors

1 technical atmosphere = 14.2233433071196 pound force per square inch
1 pound force per square inch = 0.0703069579639159 technical atmosphere

(Exact factors: 14.2233433071196 and 0.0703069579639159)

Sources: NIST · BIPM

About This Technical Atmosphere And Pound Force Per Square Inch Converter

This quick tool helps you compare technical atmosphere with pound-force per square inch. View the result clearly in the unit you need. Use the swap button to switch between technical atmosphere and pound-force per square inch. Enjoy a simple, at-a-glance display of pressure values.

What Are Technical Atmospheres And Pounds Force Per Square Inch?

What Is A Technical Atmosphere?

Technical atmosphere (at) is a unit of pressure equal to 98,066.5 pascals (≈0.9807 bar). It is a non-SI engineering unit used with the SI system. 1 at = 98,066.5 Pa = 1 kgf/cm^2. Real-world example: a car tire at about 2 at ≈ 196,133 Pa (roughly 0.196 MPa). This shows the scale: a few at represent typical mechanical pressures.

What Is A Pound Force Per Square Inch?

One pound-force per square inch (psi) is a unit of pressure in the Imperial/US customary system. It is defined as the force of one pound-force on an area of one square inch. In SI base terms, 1 psi equals 6894.757 Pa (N/m^2). Since 1 Pa = 1 N/m^2 and 1 N = 1 kg·m/s^2, 1 psi = 6894.757 kg/(m·s^2). Symbol: psi. Example: a car tire is typically around 32 psi.

When To Use Technical Atmosphere Vs Pound Force Per Square Inch

Technical Atmosphere Usage

Technical atmosphere is a legacy pressure unit used in some scientific and calibration contexts. It appears in laboratory instruments and older standards in a few countries that maintain such units. Primary users include Germany, France, Japan, and the United Kingdom.

Pound Force Per Square Inch Usage

Pounds-force per square inch (psi) is a practical pressure unit in the United States, Canada, the United Kingdom, and Australia. It appears on consumer gauges and product labeling where pressure is read in imperial units.

How To Convert Between Technical Atmospheres And Pounds Force Per Square Inch

Conversion Formulas

Technical Atmosphere to Pound Force Per Square Inch:
technical atmosphere × 14.2233433071196 = pound force per square inch

Pound Force Per Square Inch to Technical Atmosphere:
pound force per square inch × 0.0703069579639159 = technical atmosphere

Step-by-Step Guide

Technical Atmosphere to Pound Force Per Square Inch

Take your value in technical atmospheres.
Multiply by 14.2233433071196.
The result is in pounds force per square inch.

Pound Force Per Square Inch to Technical Atmosphere

Take your value in pounds force per square inch.
Multiply by 0.0703069579639159.
The result is in technical atmospheres.

Example: Convert 0.25 technical atmospheres to pounds force per square inch.

Exact: 0.25 × 14.2233433071196 = 3.55583582677989 pounds force per square inch.
Rounded: approximately 3.55584 pounds force per square inch.

Example: Convert 5 pounds force per square inch to technical atmospheres.

Exact: 5 × 0.0703069579639159 = 0.35153478981958 technical atmospheres.
Rounded: approximately 0.351535 technical atmospheres.

History & Context

Pressure measurement has a long history in science and engineering. The atmosphere began as a unit from comparing ordinary air pressure with the pressure seen in experiments that used a column of liquid mercury, and it became a standard reference for many years. A more pragmatic version, the technical atmosphere, was adopted by engineers and manufacturers to simplify design, testing, and safety work across industries in different countries. In the United States and elsewhere, the pound force per square inch emerged as a compact way to describe pressure on engines, tires, and hydraulic parts, making everyday engineering practice easier to communicate.

Practical Use

In a chemical plant, some older process specs list pressure in technical atmosphere (at); engineers convert at to psi to compare with the gauge readings on American-made equipment. When sourcing safety valves whose ratings are given in psi, technicians convert psi to technical atmosphere to check compliance with process design limits. This helps ensure that international equipment can be integrated without misinterpreting pressure limits.

Common Mistakes When Converting Between Technical Atmospheres And Pounds Force Per Square Inch

Assuming technical atmosphere and psi are the same unit and can be used interchangeably.
Converting as if all pressures are absolute when some measurements are gauge and require a reference adjustment.
Ignoring that psi is defined per square inch while technical atmosphere references a different area basis.
Relying on a single fixed conversion constant without checking the exact definitions of the pressure units involved.

Mental Shortcuts For Quick Conversions

Tip 1: 1 technical atmosphere ≈ 14.7 psi (multiply by ~14.7). Tip 2: 1 psi ≈ 0.068 atm (divide psi by ~14.7 to get atm). Note: for estimation only; use a precise converter when accuracy matters.

Technical Atmospheres And Pounds Force Per Square Inch Conversion Graph

Conversion Table For Technical Atmosphere And Pound Force Per Square Inch

Common conversion values
Technical atmospheres	Pounds force per square inch
0.1	1.42233
0.25	3.55584
1	14.2233
2	28.4467
5	71.1167
10	142.233
20	284.467
50	711.167
100	1422.33
250	3555.84
500	7111.67

Values are rounded for display; internal calculations use the exact conversion factors between technical atmosphere and pound force per square inch (14.2233433071196 and 0.0703069579639159).

Dataset & API Access

Programmatic Access

Free JSON API with stable endpoints and predictable keys for automated bidirectional conversions.

Endpoint: https://convertreference.org/api/v1/convert/technical-atmosphere-to-pound-force-per-square-inch.json

Content Type: application/json

Documentation: View API docs

Licensing

License: CC0 1.0 Universal (Public Domain)

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Data & Editorial Process

All numerical values and formulas are generated from the Pint scientific unit library (v0.25), using constants consistent with the BIPM SI Brochure (9th Edition) and NIST Special Publication 811. Explanatory text is drafted with AI assistance and reviewed by ConvertReference editors for clarity and accuracy. This converter is completely free to use, and all calculations are performed locally in your browser and never sent to a server.

2025-12-08 – Generated: Page created using Pint v0.25 verified constants.
2025-12-08 – Reviewed: Verified by ConvertReference editors; no numerical changes required.

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