atm to psi | Exact Decimal + Formula

1 Atmosphere = 14.695949 PSI (Pounds/sq in)

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

About Atmosphere and PSI (Pounds/sq in)

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.

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.

Pressure Converter

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Precision

Formula

psi = atm × 14.695948776

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

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

Atmosphere	PSI (Pounds/sq in) (Decimal)	Fraction	Real-world equivalent
0.001 atm	0.014696 psi	-	fractional unit measurement
0.01 atm	0.146959 psi	-	fractional unit measurement
0.1 atm	1.469595 psi	-	standard single unit scale
0.5 atm	7.347974 psi	-	standard single unit scale
1 atm	14.695949 psi	-	multiple unit increments
2 atm	29.391898 psi	-	multiple unit increments
5 atm	73.479744 psi	-	multiple unit increments
10 atm	146.959488 psi	-	multiple unit increments
25 atm	367.398719 psi	-	multiple unit increments
50 atm	734.797439 psi	-	multiple unit increments
100 atm	1469.594878 psi	-	multiple unit increments
250 atm	3673.987194 psi	-	multiple unit increments
500 atm	7347.974388 psi	-	multiple unit increments
1000 atm	14695.948776 psi	-	multiple unit increments

atm to psi Formula and Examples

Direct Formula psi = atm × 14.695948776

Inverse Formula atm = psi × 0.068046

Mental Math Shortcut

Multiply the value by roughly 14.7 to calculate the equivalent amount in your head.

Common Atmosphere to PSI (Pounds/sq in) Calculations

5 atm = 73.479744 psi
10 atm = 146.959488 psi
50 atm = 734.797439 psi
100 atm = 1469.594878 psi
500 atm = 7347.974388 psi

Precision & Practical Use

For example, 10 atm = 146.959488 psi — roughly multiple unit increments.

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 Atmosphere to PSI (Pounds/sq in)

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

One Atmosphere (atm) equals 14.695949 PSI (Pounds/sq in) (psi). To convert atmospheres to psi (pounds/sq in)s, multiply the atmosphere value by 14.695949.

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

Multiply your atmosphere value by 14.695949 to get the result in PSI (Pounds/sq in): psi = atm × 14.695949. For example, 5 atm = 73.479744 psi.

What is the formula for converting atm to psi?

The conversion formula is psi = atm × 14.695949. 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 atm to psi?