Atmosphere (atm)
Convert Atmosphere to Other Units
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About the Atmosphere
Unit Details
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Reference Chart
Atmosphere Reference Chart - Pressure Conversions
Interactive conversion chart showing pressure unit relationships. Compare 8 common units with precise calculations.
| Unit | Symbol | Equivalent to 1 atm |
|---|---|---|
| AtmosphereBase Unit | atm | 1 |
| Attopascal | aPa | 9.869E-24 |
| Bar | bar | 0.986923 |
| Centimeter Mercury (0°C) | cmHg | 0.013158 |
| Centimeter Water (4°C) | cmH2O | 9.678E-4 |
| Centipascal | cPa | 9.869E-8 |
| Decipascal | dPa | 9.869E-7 |
| Dekapascal | daPa | 9.869E-5 |
Quick Reference
About Pressure
Convert between different units of pressure
Conversion Accuracy
All conversions use official conversion factors and are calculated with maximum precision to ensure professional-grade accuracy.
Comparison Table
Atmosphere Comparison Table
Compare Atmosphere values with 6 other pressure units. Quick reference for common conversion values.
| Atmosphere (atm) | Attopascal (aPa) | Bar (bar) | Centimeter Mercury (0°C) (cmHg) | Centimeter Water (4°C) (cmH2O) | Centipascal (cPa) | Decipascal (dPa) |
|---|---|---|---|---|---|---|
| 1 | 1.013E23 | 1.01325 | 76.000027 | 1,033.255856 | 1.013E7 | 1.013E6 |
| 5 | 5.066E23 | 5.06625 | 380.000137 | 5,166.279282 | 5.066E7 | 5.066E6 |
| 10 | 1.013E24 | 10.1325 | 760.000274 | 10,332.558564 | 1.013E8 | 1.013E7 |
| 25 | 2.533E24 | 25.331249 | 1,900.000684 | 25,831.396409 | 2.533E8 | 2.533E7 |
| 50 | 5.066E24 | 50.662498 | 3,800.001368 | 51,662.792818 | 5.066E8 | 5.066E7 |
| 100 | 1.013E25 | 101.324997 | 7,600.002736 | 103,325.585637 | 1.013E9 | 1.013E8 |
How to Use This Table
Find the value in Atmosphere in the first column, then read across to see the equivalent values in other pressure units.
Precision Note
All conversions are calculated using precise conversion factors with locale-appropriate number formatting for optimal readability.
About the Atmosphere
The Atmosphere (atm) is a unit of pressure measurement. Use our converter above to convert Atmosphere to any other pressure unit instantly