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Standard atmosphere to Millibar (atm → mbar)

Convert standard atmosphere to millibar instantly. The conversion factor below is exact by international definition.

Realtime·pressure·metric
Exact
atm
× 1,013.25
mbar
1,013.25
Precision [auto]
6

📐atm to mbar formulaExact

mbar = atm × 1013.25
Inverse: atm = mbar × 0.000986923267

Worked example: 1 atm = 1013.25 mbar

ℹ️About these units

Standard atmosphere (atm)
Source: 1 atm = 101 325 Pa exact (BIPM).
Millibar (mbar)

📊Reference table: atm → mbar

Standard atmosphere (atm)Millibar (mbar)
11,013.25
22,026.5
55,066.25
1010,132.5
1515,198.75
2020,265
2525,331.25
5050,662.5
100101,325
250253,312.5
500506,625
750759,937.5
1,0001,013,250

Want a downloadable CSV? Append ?format=csv to the API /api/v1/table endpoint.

🔁Reverse & related

Reverse: mbar → atmatm → baratm → Paatm → kPaatm → MPaatm → hPaatm → psiatm → ksiatm → Torr

🔌API & widget

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