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Standard atmospheres to Bars Converter

1 atm = 1.01325 bar

1 standard atmosphere equals 1.01325 bars. To convert standard atmospheres to bars, multiply the standard atmosphere value by 1.01325. For quick reference: 1 atm = 1.01325 bar, 5 atm = 5.06625 bar, 10 atm = 10.1325 bar, 100 atm = 101.325 bar.

1.01325
FormulaBars = Standard atmospheres × 1.01325
Quick

How to convert standard atmospheres to bars

  1. Take your value

    Start with your value in standard atmospheres.

  2. Multiply by 1.01325

    Multiply the standard atmosphere value by 1.01325. This is the exact conversion factor from standard atmospheres to bars.

  3. Read the result

    The product is your value in bars. For example, 5 atm × 1.01325 = 5.06625 bar.

Conversion formula

The exact factor from standard atmospheres to bars is 1.01325.

Bars = Standard atmospheres × 1.01325

Standard atmospheres to Bars conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from standard atmospheres to bars
Standard atmospheres (atm)Bars (bar)
0.001 atm0.0010133 bar
0.01 atm0.010133 bar
0.1 atm0.10133 bar
0.5 atm0.50663 bar
1 atm1.0133 bar
1.5 atm1.5199 bar
2 atm2.0265 bar
2.5 atm2.5331 bar
3 atm3.0398 bar
4 atm4.053 bar
5 atm5.0663 bar
6 atm6.0795 bar
7 atm7.0928 bar
8 atm8.106 bar
9 atm9.1192 bar
10 atm10.133 bar
14 atm14.186 bar
15 atm15.199 bar
20 atm20.265 bar
25 atm25.331 bar
30 atm30.398 bar
32 atm32.424 bar
35 atm35.464 bar
40 atm40.53 bar
50 atm50.663 bar
60 atm60.795 bar
75 atm75.994 bar
80 atm81.06 bar
100 atm101.33 bar
101.325 atm102.67 bar
150 atm151.99 bar
200 atm202.65 bar
250 atm253.31 bar
300 atm303.98 bar
400 atm405.3 bar
500 atm506.63 bar
760 atm770.07 bar
1000 atm1013.3 bar
1013.25 atm1026.7 bar
2000 atm2026.5 bar
5000 atm5066.3 bar
10000 atm10133 bar
14.7 atm14.895 bar
50000 atm50663 bar
100000 atm101325 bar
101325 atm102668 bar
200000 atm202650 bar
500000 atm506625 bar
1000000 atm1013250 bar
10000000 atm10132500 bar

Real-world reference

Earth's mean sea-level pressure is approximately 1 atm. Pressure doubles roughly every 10 m of seawater. In bars, that gives you: 1 atm = 1.01325 bar, 10 atm = 10.1325 bar, 100 atm = 101.325 bar.

Frequently asked questions

How many bars are in 1 standard atmosphere?
1 standard atmosphere equals 1.01325 bars.
How do I convert standard atmospheres to bars?
Multiply the standard atmosphere value by 1.01325. So x atm × 1.01325 = the equivalent in bar.
What is 5 standard atmospheres in bars?
5 standard atmospheres equals 5.06625 bars.
What is 10 standard atmospheres in bars?
10 standard atmospheres equals 10.1325 bars.
What is 100 standard atmospheres in bars?
100 standard atmospheres equals 101.325 bars.
How do I convert back from bars to standard atmospheres?
Multiply the bar value by 0.986923. For example, 1 bar = 0.986923 atm.
Is the standard atmosphere bigger than the bar?
Yes. 1 standard atmosphere is larger than 1 bar — specifically 1.01325 times larger.
Are these conversion factors exact?
Yes. The factor of 1.01325 is derived directly from the SI definitions of standard atmosphere and bar.

About the standard atmosphere and the bar

The standard atmosphere

The standard atmosphere (atm) is defined as exactly 101,325 Pa. It is the conventional reference for chemistry (gas-law calculations), aviation altimetry, and historic engineering. Despite the name, it is not the actual atmospheric pressure at any single place — that varies daily.

The bar

The bar equals exactly 100,000 pascals — close to but not equal to standard atmospheric pressure (1 atm = 1.01325 bar). It is the working unit for compressed-air systems, pneumatic tools, dive computers, and weather pressure outside North America.

Related converters

Bars to Standard atmospheres
bar → atm
Pascals to Kilopascals
Pa → kPa
Pascals to Bars
Pa → bar
Pascals to Standard atmospheres
Pa → atm
Pascals to Pounds per square inch
Pa → psi
Pascals to Millimeters of mercury
Pa → mmHg

Sources