PRESSURE CONVERSION
Standard atmosphere to Millibar.
Convert standard atmosphere (atm) to millibar (mbar), with the math explained.
1 atm = 1,013.25 mbar
THE MATH, MADE SIMPLE
How to convert standard atmosphere to millibar
Multiply your standard atmosphere value by 1,013.25 to get the equivalent in millibar. Both units are normalized through the pascal.
mbar = atm × 1,013.2510 atm = 10,132.5 mbar
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
atm to mbar conversion table
| Standard atmosphere (atm) | Millibar (mbar) |
|---|---|
| 1 atm | 1,013.25 mbar |
| 2 atm | 2,026.5 mbar |
| 5 atm | 5,066.25 mbar |
| 10 atm | 10,132.5 mbar |
| 20 atm | 20,265 mbar |
| 50 atm | 50,662.5 mbar |
| 100 atm | 101,325 mbar |
| 500 atm | 506,625 mbar |
| 1,000 atm | 1,013,250 mbar |
About the standard atmosphere
The standard atmosphere (atm) is a unit of pressure. One standard atmosphere equals 101,325 pascal (base unit) in this calculator.
All standard atmosphere conversionsAbout the millibar
The millibar (mbar) is a unit of pressure. One millibar equals 100 pascal (base unit) in this calculator.
All millibar conversionsCommon questions
What is 1 atm in mbar?
One standard atmosphere equals 1,013.25 mbar. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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