Standard atmosphere Converter
Created by: tinycalcs.com/en
Number of supported units: 31
Last update: 2026
The Standard atmosphere Converter supports 31 different pressure units. This makes it possible to convert freely between standard atmospheres [atm], American, metric, and other pressure units. All values are converted in real time and displayed with up to 20 decimal places, ensuring sufficient accuracy.
Conversion of standard atmospheres
In order to convert standard atmospheres [atm] into another printing unit, a conversion value is required. This value can be determined using a conversion table. However, the table is relatively large, confusing, and difficult for inexperienced users to understand. The tool below provides a solution to this problem by allowing the rounded conversion values for standard atmospheres [atm] to be queried directly from the conversion table.
Determine conversion factor
Conversion between standard atmospheres and millibar
A quick and precise conversion between standard atmospheres [atm] and millibar [mbar] is straightforward and requires only multiplication or division by 1,013.25. The conversion from standard atmospheres [atm] to millibar [mbar] is done by multiplying the value in standard atmospheres [atm] by 1,013.25. To reverse the conversion, divide the value in millibar [mbar] by 1,013.25 to obtain standard atmospheres [atm].
- Millibar [mbar] = standard atmospheres [atm] * 1,013.25
- Standard atmospheres [atm] = millibar [mbar] ÷ 1,013.25
Conversion between standard atmospheres and bar
You can easily convert between bar [bar] and standard atmospheres [atm] using the formulas provided below. For accurate results, it is important to follow the correct order of mathematical operations.
- Standard atmospheres [atm] = bar [bar] ÷ 101,325 * 105
- Bar [bar] = standard atmospheres [atm] * 101,325 ÷ 105
Conversion between standard atmospheres and psi
The fastest and easiest way to convert between psi [psi] and standard atmospheres [atm] is to use the converter above. Manual conversions are also possible and can be done using the formulas provided below.
- Standard atmospheres [atm] = psi [psi] ÷ 653,708.37 * 4,535.9237 * 9.80665
- Psi [psi] = standard atmospheres [atm] * 653,708.37 ÷ 4,535.9237 ÷ 9.80665
Conversion between standard atmospheres and pascals
Conversions between standard atmospheres [atm] and pascals [Pa] are straightforward and can be performed with simple math. The required conversion factor is 101,325. To convert a value from standard atmospheres [atm] to pascals [Pa], multiply the number of standard atmospheres [atm] by 101,325. For values in pascals [Pa], divide by 101,325 to get the equivalent in standard atmospheres [atm].
- Pascals [Pa] = standard atmospheres [atm] * 101,325
- Standard atmospheres [atm] = pascals [Pa] ÷ 101,325
Conversion between standard atmospheres and kilograms per square meter
The two formulas below provide an easy way to convert between standard atmospheres [atm] and kilograms per square meter [kg/m²]. To ensure precise conversion results, it is important to follow the correct order of math operations.
- Kilograms per square meter [kg/m²] = standard atmospheres [atm] ÷ 9.80665 * 101,325
- Standard atmospheres [atm] = kilograms per square meter [kg/m²] * 9.80665 ÷ 101,325
Standard atmosphere
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Technical atmospheres
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