Atmosphere to Bar Converter
Pressure · unit-converter
Convert Atmosphere to Bar 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 Atmosphere
The standard atmosphere (atm) is defined as exactly 101,325 Pa. It links legacy chemistry and physics problems to SI.
About Bar
The bar is 100,000 Pa. It is convenient for industrial and approximate atmospheric pressures (1 bar ≈ 1 atm).
How to convert atmosphere to bar
1 atmosphere equals 1.01325 bar in this tool (via pascal):
1 atm = (101325 Pa ÷ 100000 Pa) bar = 1.01325 bar
Each atmosphere carries 101325 Pa and each bar 100000 Pa, so one atm equals 101325 ÷ 100000 bar.
Let p(atm) be pressure in Atmosphere (atm), and p(bar) in Bar (bar). Then:
p(bar) = p(atm) × (101325 / 100000)
Equivalently, divide by how many atm fit into one bar (Pa per bar divided by Pa per atm):
p(bar) = p(atm) ÷ 0.9869232667160128
Examples
Example #1: Convert 1 atm to bar
1 atm = 1 atm × (101325/100000) bar = 1.01325 bar
1 atm = 1 atm ÷ 0.9869232667160128 = 1.01325 bar
1 atm × (101,325/100,000) = 1.013250 bar
Example #2: Convert 10 atm to bar
10 atm = 10 atm × (101325/100000) bar = 10.1325 bar
10 atm = 10 atm ÷ 0.9869232667160128 = 10.1325 bar
10 atm × (101,325/100,000) = 10.132500 bar
Summary
To convert Atmosphere to Bar, multiply the value in atm by (101325 Pa per atm) / (100000 Pa per bar). Equivalently: value_bar = value_atm × (101325 / 100000). Numerically, 1 atm equals 1.01325 bar.
Relationship context
Both Atmosphere and Bar are converted by fixed multiples of the pascal. Multiplying by (Pa per atm) ÷ (Pa per bar) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| Atmosphere (atm) | Bar (bar) |
|---|---|
| 0.1 | 0.101325 |
| 1 | 1.01325 |
| 2 | 2.0265 |
| 3 | 3.03975 |
| 4 | 4.053 |
| 5 | 5.06625 |
| 6 | 6.0795 |
| 7 | 7.09275 |
| 8 | 8.106 |
| 9 | 9.11925 |
| Atmosphere (atm) | Bar (bar) |
|---|---|
| 10 | 10.1325 |
| 20 | 20.265 |
| 30 | 30.3975 |
| 40 | 40.53 |
| 50 | 50.6625 |
| 60 | 60.795 |
| 70 | 70.9275 |
| 80 | 81.06 |
| 90 | 91.1925 |
| 100 | 101.325 |