Standard atmospheres to Millibars
Convert standard atmospheres (atm) to millibars (mbar). Live results, batch values, CSV export, formula and examples. Free, no sign-up.
Runs on your device · no data upload
Up to 500 values. Calculations stay on this device. Decimal point: dot. Results use floating-point arithmetic and the selected display precision.
Results
1 values converted
| row | input | from | result | to | error |
|---|---|---|---|---|---|
| 1 | 1 | atm | 1013.25 | mbar | — |
Pressure units describe absolute quantities. Gauge-to-absolute pressure requires a separate atmospheric-pressure input.
Raw response
[
{
"row": 1,
"input": 1,
"from": "atm",
"result": "1013.25",
"to": "mbar"
}
]How to convert standard atmospheres to millibars
Enter one value or paste one value per line. Change precision, swap units, then copy or export the results. Invalid values are reported individually.
result = (value × 101325 + 0 − 0) ÷ 100
Pressure units describe absolute quantities. Gauge-to-absolute pressure requires a separate atmospheric-pressure input.
| Standard atmospheres (atm) | Millibars (mbar) |
|---|---|
| 0 | 0 |
| 1 | 1013.25 |
| 10 | 10132.5 |
| 100 | 101325 |
Reference: NIST unit conversion factors. Decimal and binary storage prefixes are distinct; rounded display values do not change the underlying calculation.