psi to atm | Exact Decimal + Formula

1 PSI (Pounds/sq in) = 0.068046 Atmosphere

One atmosphere equals about 14.7 psi (exactly 14.69594878 psi). Real-world use: tire pressures, air compressors, hydraulic systems, and plumbing in the US. This page expresses those values in atmospheres, which is used for scuba decompression tables and engineering reference conditions. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About PSI (Pounds/sq in) and Atmosphere

PSI (Pounds/sq in) (psi)

PSI (pounds per square inch) measures pressure in pounds of force per square inch, about 6,895 pascals.

Where it's used: Tire pressures, air compressors, hydraulic systems, and plumbing in the US.

Atmosphere (atm)

One standard atmosphere is exactly 101,325 pascals, the average sea-level air pressure.

Where it's used: Scuba decompression tables and engineering reference conditions.

Pressure Converter

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Precision

Formula

atm = psi × 0.068045964

To convert PSI (Pounds/sq in) to Atmosphere, use the formula displayed above.

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PSI (Pounds/sq in) to Atmosphere: Quick Reference Table

PSI (Pounds/sq in)	Atmosphere (Decimal)	Fraction	Real-world equivalent
0.001 psi	0.000068 atm	-	fractional unit measurement
0.01 psi	0.00068 atm	-	fractional unit measurement
0.1 psi	0.006805 atm	-	fractional unit measurement
0.5 psi	0.034023 atm	-	fractional unit measurement
1 psi	0.068046 atm	-	fractional unit measurement
2 psi	0.136092 atm	-	fractional unit measurement
5 psi	0.34023 atm	-	fractional unit measurement
10 psi	0.68046 atm	-	fractional unit measurement
25 psi	1.701149 atm	-	standard single unit scale
50 psi	3.402298 atm	-	standard single unit scale
100 psi	6.804596 atm	-	standard single unit scale
250 psi	17.011491 atm	-	multiple unit increments
500 psi	34.022982 atm	-	multiple unit increments
1000 psi	68.045964 atm	-	multiple unit increments

psi to atm Formula and Examples

Direct Formula atm = psi × 0.068045964

Inverse Formula psi = atm × 14.695949

Mental Math Shortcut

Divide the value by roughly 14.7 to quickly estimate the converted result.

Common PSI (Pounds/sq in) to Atmosphere Calculations

5 psi = 0.34023 atm
10 psi = 0.68046 atm
50 psi = 3.402298 atm
100 psi = 6.804596 atm
500 psi = 34.022982 atm

Precision & Practical Use

For example, 10 psi = 0.68046 atm — roughly fractional unit measurement.

Tire pressures are specified to 1 psi or 0.1 bar; scuba and HVAC work also use whole units. The extra decimals here are for engineering precision.

Related Specialist Pressure Calculators & Niche Tools

Pressure represents force acting over a unit of area. Standard pressure scales like PSI, bar, kilopascals (kPa), and atmospheres (atm) are utilized in HVAC, hydraulics, automotive tire inflation, and pneumatic tool operations.

Converting pressure ratings accurately is essential for equipment safety. For instance, European machinery gauges often use bar, whereas American compressors use PSI, necessitating quick conversions to prevent system over-pressurization. Our pressure calculators help technicians easily convert between scales, ensuring pressure vessels, hydraulic lines, and automotive tires are maintained at the correct operational levels.

PSI/Bar/kPa Converter Convert pressure units.

How to Convert PSI (Pounds/sq in) to Atmosphere

How many atmospheres are in one psi (pounds/sq in)?

One PSI (Pounds/sq in) (psi) equals 0.068046 Atmosphere (atm). To convert psi (pounds/sq in)s to atmospheres, multiply the psi (pounds/sq in) value by 0.068046.

How do I convert PSI (Pounds/sq in) to Atmosphere?

Multiply your psi (pounds/sq in) value by 0.068046 to get the result in Atmosphere: atm = psi × 0.068046. For example, 5 psi = 0.34023 atm.

What is the formula for converting psi to atm?

The conversion formula is atm = psi × 0.068046. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for psi to atm?