Convert millibars (mbar) to standard atmospheres (atm).
Edit either value. Decimals and scientific notation supported.
No units found. Try a name or symbol.
No units found. Try a name or symbol.
1 mbar ≈ 0.0009869232667 atm
Precision changes displayed rounding, not calculation accuracy.
atm = mbar ÷ 1013.25atm = mbar ÷ 1013.25
Divide the mbar reading by 1013.25.
1 mbar ≈ 0.0009869232667 atm
1 ÷ 1013.25 ≈ 0.0009869232667
1000 mbar ≈ 0.9869232667 atm
1000 ÷ 1013.25 ≈ 0.9869232667
No. Unit conversion preserves the original pressure reference. Converting a gauge reading to absolute pressure additionally requires the applicable atmospheric pressure.
Fixed reference · Millibar to Standard atmosphere
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
| Millibar (mbar) | Standard atmosphere (atm) |
|---|---|
| 0 | 0 |
| 0.1 | 0.00009869232667 |
| 0.5 | 0.0004934616334 |
| 1 | 0.0009869232667 |
| 2 | 0.001973846533 |
| 5 | 0.004934616334 |
| 10 | 0.009869232667 |
| 25 | 0.02467308167 |
| 50 | 0.04934616334 |
| 100 | 0.09869232667 |
| 1000 | 0.9869232667 |
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