This pressure converter translates standard atmospheres to pascals and kilopascals using the exact 1 atm = 101325 Pa definition.
Conversion
atm to Pascals Conversion
Convert standard atmospheres to pascals and kilopascals using 1 atm = 101325 Pa.
Calculator
About this calculator
Formula notes
pascals = atm x 101325; kilopascals = pascals / 1000; atmospheres = pascals / 101325.
Worked examples
- Example: 2.5 atm equals 253312.5 Pa, about 253.31 kPa.
- 0.75 atm equals 75993.75 Pa, or about 75.99 kPa.
How to use it
- Enter a nonnegative pressure.
- Choose whether you measured in atmospheres or pascals.
- Read atmospheres, pascals, and kilopascals.
Frequently asked questions
What is the exact conversion used?
1 standard atmosphere equals exactly 101325 pascals, which is also 101.325 kPa.
Can I convert from pascals back to atmospheres?
Yes. Select Pa as the input unit and the calculator returns atmospheres.
Limits and interpretation
- The tool uses the exact standard-atmosphere definition, so results are deterministic given the input.
- It converts only between atmospheres, pascals, and kilopascals; other pressure units belong in the full pressure converter.