Bar to Atmosphere Converter
Pressure · unit-converter
Convert Bar to Atmosphere with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through pascal with fixed definitions (standard atmosphere = 101,325 Pa; torr and mmHg = atm/760; plus industrial/manometer units like kgf/cm², inHg, inH2O, and mmH2O).
About Bar
The bar is 100,000 Pa. It is convenient for industrial and approximate atmospheric pressures (1 bar ≈ 1 atm).
About Atmosphere
The standard atmosphere (atm) is defined as exactly 101,325 Pa. It links legacy chemistry and physics problems to SI.
How to convert bar to atmosphere
1 bar equals 0.9869232667160128 atmosphere in this tool (via pascal):
1 bar = (100000 Pa ÷ 101325 Pa) atm = 0.9869232667160128 atm
Each bar carries 100000 Pa and each atmosphere 101325 Pa, so one bar equals 100000 ÷ 101325 atm.
Let p(bar) be pressure in Bar (bar), and p(atm) in Atmosphere (atm). Then:
p(atm) = p(bar) × (100000 / 101325)
Equivalently, divide by how many bar fit into one atm (Pa per atm divided by Pa per bar):
p(atm) = p(bar) ÷ 1.01325
Examples
Example #1: Convert 1 bar to atmosphere
1 bar = 1 bar × (100000/101325) atm = 0.9869232667 atm
1 bar = 1 bar ÷ 1.01325 = 0.9869232667 atm
1 bar × (100,000/101,325) = 0.986923 atm
Example #2: Convert 10 bar to atmosphere
10 bar = 10 bar × (100000/101325) atm = 9.8692326672 atm
10 bar = 10 bar ÷ 1.01325 = 9.8692326672 atm
10 bar × (100,000/101,325) = 9.869233 atm
Summary
To convert Bar to Atmosphere, multiply the value in bar by (100000 Pa per bar) / (101325 Pa per atm). Equivalently: value_atm = value_bar × (100000 / 101325). Numerically, 1 bar equals 0.9869232667160128 atm.
Relationship context
Both Bar and Atmosphere are converted by fixed multiples of the pascal. Multiplying by (Pa per bar) ÷ (Pa per atm) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| Bar (bar) | Atmosphere (atm) |
|---|---|
| 0.1 | 0.0986923267 |
| 1 | 0.9869232667 |
| 2 | 1.9738465334 |
| 3 | 2.9607698002 |
| 4 | 3.9476930669 |
| 5 | 4.9346163336 |
| 6 | 5.9215396003 |
| 7 | 6.908462867 |
| 8 | 7.8953861337 |
| 9 | 8.8823094004 |
| Bar (bar) | Atmosphere (atm) |
|---|---|
| 10 | 9.8692326672 |
| 20 | 19.7384653343 |
| 30 | 29.6076980015 |
| 40 | 39.4769306686 |
| 50 | 49.3461633358 |
| 60 | 59.215396003 |
| 70 | 69.0846286701 |
| 80 | 78.9538613373 |
| 90 | 88.8230940044 |
| 100 | 98.6923266716 |