18 Pascals to Standard Atmospheres

18 Pa ≈ 0.00017765 atm

Calculation: atm = 18 Pa × 9.86923 × 10⁻⁶ ≈ 0.00017765 atm

Pascal to Standard Atmosphere Converter

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How much pressure is 18 Pa?

0.003 psi (0.018 kPa) is comparable to a laboratory vacuum, such as inside a glass bell jar.

What does 18 Pa look like?

Illustration of a vacuum bell jar
0.003 psi (0.018 kPa) is comparable to a laboratory vacuum, such as inside a glass bell jar.

How to Convert Pascal to Standard Atmosphere

1 pascal = 9.86923 × 10-6 standard atmospheres exact

Standard Atmosphere = Pascal × 9.86923 × 10-6

Example: 18 Pa × 9.86923 × 10-6 = 0.00017765 atm

Reverse Conversion

To convert standard atmospheres back to pascals:

  • Remember, 1 standard atmosphere equals 101325 pascals.
  • To convert 0.00017765 atm to Pa, multiply 0.00017765 x 101325, resulting in 18 Pa.

exact This conversion factor is exact by international definition.

18 Pa is also equal to:

  • 0.018 kPa
  • 0.00018 bar
  • 0.0026107 psi
About these units

Pascal: SI derived unit of pressure equal to one newton per square meter (N/m²).

Standard atmosphere: Standard unit of atmospheric pressure defined as exactly 101,325 pascals.

Frequently Asked Questions

How much is 18 pascals in standard atmospheres?

18 pascals equals 0.00017765 standard atmospheres. This is calculated by multiplying 18 by the conversion factor 9.86923 × 10⁻⁶.

What does 18 pascals look like in standard atmospheres?

18 pascals (0.00017765 standard atmospheres) is very low pressure — a gentle breeze creates about 1-10 Pa.

How do you calculate 18 pascals to standard atmospheres?

Multiply 18 by the conversion factor 9.86923 × 10⁻⁶. The calculation is 18 × 9.86923 × 10⁻⁶ = 0.00017765 standard atmospheres. This factor is defined by international measurement standards.

Share This Calculation

18 pascals = 0.000177646 standard atmospheres
18 pascals = 0.000177646 standard atmospheres — conversion chart

Nearby Conversions

8 pascals7.895 × 10⁻⁵ standard atmospheres 9 pascals8.882 × 10⁻⁵ standard atmospheres 10 pascals9.869 × 10⁻⁵ standard atmospheres 11 pascals0.0001086 standard atmospheres 12 pascals0.0001184 standard atmospheres 13 pascals0.0001283 standard atmospheres 14 pascals0.0001382 standard atmospheres 15 pascals0.000148 standard atmospheres 16 pascals0.0001579 standard atmospheres 17 pascals0.0001678 standard atmospheres 19 pascals0.0001875 standard atmospheres 20 pascals0.0001974 standard atmospheres 21 pascals0.0002073 standard atmospheres 22 pascals0.0002171 standard atmospheres 23 pascals0.000227 standard atmospheres 24 pascals0.0002369 standard atmospheres 25 pascals0.0002467 standard atmospheres 26 pascals0.0002566 standard atmospheres 27 pascals0.0002665 standard atmospheres 28 pascals0.0002763 standard atmospheres

For general conversions between pascals and standard atmospheres, see the pascals to standard atmospheres converter.

Also convert Pascals to:

Conversion factors verified against NIST, BIPM, ISO 80000-4 1 atm = 101 325 Pa by definition (BIPM). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.