How do I convert psi to atmospheres?

To convert psi to atmospheres, enter your value above. Our converter supports all common pressure units including PSI, bar, pascals, and atmospheres.

How accurate are these pressure conversions?

Our conversions are accurate to at least 6 decimal places using precise conversion factors. This level of accuracy is suitable for scientific, industrial, and engineering applications.

PSI to Atmosphere Converter

Convert PSI to Atmospheres instantly

From

psi

Result

0atm

Atmosphere

Conversion Formula

Atmosphere = PSI × 0.068046

Where:

psi = PSI
atm = Atmosphere

What is a PSI?

The psi (psi) is a unit of pressure in the imperial system of measurement.

What is a Atmosphere?

The atmosphere (atm) is a unit of pressure in the scientific system of measurement.

How to Convert PSI to Atmosphere

Convert psi to atmospheres instantly

Quick Reference:

1 psi = 0.068046 atm
1 atm = 14.695943 psi

Common PSI to Atmosphere Conversions

1 psi
= 0.07 atm

5 psi
= 0.34 atm

10 psi
= 0.68 atm

25 psi
= 1.70 atm

50 psi
= 3.40 atm

100 psi
= 6.80 atm

Conversion Reference Table

PSI (psi)	Atmosphere (atm)
1	0.068
2	0.1361
3	0.2041
4	0.2722
5	0.3402
10	0.6805
15	1.0207
20	1.3609
25	1.7011
50	3.4023
75	5.1034
100	6.8046
250	17.0115
500	34.023
1,000	68.046

Quick reference table showing common psi to atmospheres conversions.

Real-World Pressure Conversions

🚗

Tire Pressure

Car tires are typically inflated to 30-35 PSI (2.0-2.4 bar). Proper tire pressure improves fuel efficiency and safety. Converting between PSI, bar, and kPa for international vehicles.

🌤️

Weather and Meteorology

Barometric pressure is measured in millibars (mb) or hectopascals (hPa). Standard pressure is 1013.25 mb. High pressure (>1020 mb) brings clear weather, low pressure (<1000 mb) brings storms.

🤿

Scuba Diving

Underwater pressure increases by 1 atmosphere (14.7 PSI) every 33 feet of depth. Dive computers and tanks use bar or PSI. Understanding pressure is critical for diver safety.

❄️

HVAC and Refrigeration

Air conditioning systems use PSI or bar for refrigerant pressure. Proper pressure ensures efficient cooling. Low pressure indicates leaks, high pressure suggests system problems.

🏥

Medical Applications

Blood pressure is measured in mmHg (millimeters of mercury). Normal blood pressure is around 120/80 mmHg. Medical gas cylinders also use PSI or bar.

🏭

Industrial Processes

Manufacturing uses various pressure units for hydraulics (PSI), pneumatics (bar), and vacuum systems (torr or Pa). Accurate pressure control ensures product quality.

Pressure Conversion FAQs

Common Conversion Mistakes

⚠Confusing the direction of conversion — always check whether you are converting from PSI to Atmosphere or vice versa.
⚠Rounding too early in multi-step calculations. Keep full precision until the final result.
⚠Using outdated or approximate conversion factors. Our converter uses values traceable to international measurement standards.

Sources & Standards

Conversion factors on this page are based on definitions from the International Bureau of Weights and Measures (BIPM) and the National Institute of Standards and Technology (NIST). All factors are accurate to at least 6 decimal places.

Last updated: November 27, 2025