How do I convert Pa to atm?

Use the formula shown above or enter a value to see Pa converted to atm instantly.

What is the formula for Pa to atm?

The converter calculates atm by applying the category-specific conversion factor for Pressure.

When should I use Pa vs atm?

Pa and atm are both part of the Pressure category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Pressure Conversion Cheat Sheet

Convert Pa to atm

Use the live converter below to translate between Pascal (Pa) and Atmosphere (atm). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

Pa → atm

Pascal

Atmosphere

atm

Rounded result (4 decimals max)

Formula

1 Pa = 0 atm

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from atm to Pa.

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Pa to atm quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Pascal (Pa)	Atmosphere (atm)
0.25 Pa	0 atm
0.5 Pa	0 atm
1 Pa	0 atm
2 Pa	0 atm
5 Pa	0 atm
10 Pa	0.0001 atm
25 Pa	0.0002 atm
100 Pa	0.001 atm

atm back to Pa

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Atmosphere (atm)	Pascal (Pa)
0.25 atm	25,331.25 Pa
0.5 atm	50,662.5 Pa
1 atm	101,325 Pa
2 atm	202,650 Pa
5 atm	506,625 Pa
10 atm	1,013,250 Pa
25 atm	2,533,125 Pa
100 atm	10,132,500 Pa

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