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Atmospheres (atm) Pressure Converter

Result

Calculated result Ready Change any value to calculate instantly.
↗ Conversion

Atmospheres (atm) Pressure Converter Convert pressure in standard atmospheres (atm) to other common pressure units — pascals, kilopascals, bar, pounds per square inch and millimetres of mercury. One standard atmosphere equals 101,325 Pa. Enter a value in — convert units quickly and accurately.

Formula

1 atm = 101325 Pa = 101.325 kPa = 1.01325 bar
  • Standard atmosphere is an absolute pressure. Convert to Pa, kPa, bar, psi and Torr.
  • The main inputs are Value, From unit, To unit. Enter them in the units and format shown in the calculator.
  • For unit conversions, the calculator applies the conversion relationship shown above and keeps source and target units consistent with the selected options.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Atmospheres (atm) Pressure

Inputs
  • Value: 1
  • From unit: meter (m)
  • To unit: decimeter (dm)

Example inputs: Atmospheric pressure (atm) = 1. Calculated result: Pascals (Pa): 101325 | Kilopascals (kPa): 101.325 | Bar: 1.01325 | PSI: 14.69594878 | Torr: 760.

Sample result: Calculating…

Frequently asked questions

What does the Atmospheres (atm) Pressure calculate?

The calculator uses standard conversion factors. Temperature conversions use exact scale formulas.

Which values should I enter?

Enter Value, From unit, To unit using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: 1 atm = 101325 Pa = 101.325 kPa = 1.01325 bar.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026