Hectopascal to Bar Converter
Pressure · unit-converter
Convert Hectopascal 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 Hectopascal
The hectopascal (hPa) equals 100 Pa. Meteorologists use hPa for surface charts; 1 hPa equals 1 millibar.
About Bar
The bar is 100,000 Pa. It is convenient for industrial and approximate atmospheric pressures (1 bar ≈ 1 atm).
How to convert hectopascal (hpa) to bar
1 hectopascal equals 0.001 bar in this tool (via pascal):
1 hpa = (100 Pa ÷ 100000 Pa) bar = 0.001 bar
Each hectopascal carries 100 Pa and each bar 100000 Pa, so one hpa equals 100 ÷ 100000 bar.
Let p(hpa) be pressure in Hectopascal (hpa), and p(bar) in Bar (bar). Then:
p(bar) = p(hpa) × (100 / 100000)
Equivalently, divide by how many hpa fit into one bar (Pa per bar divided by Pa per hpa):
p(bar) = p(hpa) ÷ 1000
Examples
Example #1: Convert 1 hpa to bar
1 hpa = 1 hpa × (100/100000) bar = 0.001 bar
1 hpa = 1 hpa ÷ 1000 = 0.001 bar
1 hpa × (100/100,000) = 0.001000 bar
Example #2: Convert 10 hpa to bar
10 hpa = 10 hpa × (100/100000) bar = 0.01 bar
10 hpa = 10 hpa ÷ 1000 = 0.01 bar
10 hpa × (100/100,000) = 0.010000 bar
Summary
To convert Hectopascal to Bar, multiply the value in hpa by (100 Pa per hpa) / (100000 Pa per bar). Equivalently: value_bar = value_hpa × (100 / 100000). Numerically, 1 hpa equals 0.001 bar.
Relationship context
Both Hectopascal and Bar are converted by fixed multiples of the pascal. Multiplying by (Pa per hpa) ÷ (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
| Hectopascal (hpa) | Bar (bar) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Hectopascal (hpa) | Bar (bar) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |