Hectopascal to Standard atmosphere Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert hectopascals [hPa] to standard atmospheres [atm] or standard atmospheres [atm] to hectopascals [hPa]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert hectopascals to standard atmospheres
There are two simple ways to convert hectopascals [hPa] to standard atmospheres [atm]. In the first calculation method, the value in hectopascals [hPa] is divided by 1,013.25. The second method multiplies the value in hectopascals [hPa] by the rounded conversion factor of 9.869 * 10-4.
- Standard atmospheres [atm] = hectopascals [hPa] ÷ 1,013.25
- Standard atmospheres [atm] ≈ hectopascals [hPa] * 9.869 * 10-4
The calculation method with a rounded conversion value is more suitable for rough conversions from hectopascals [hPa] to standard atmospheres [atm], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert standard atmospheres to hectopascals
Converting standard atmospheres [atm] to hectopascals [hPa] is easy and can be done in two ways. The first method involves multiplication, whereby the value in standard atmospheres [atm] is multiplied by 1,013.25. The second variant is a division. Here, the value in standard atmospheres [atm] is divided by the rounded conversion factor of 9.869 * 10-4.
- Hectopascals [hPa] = standard atmospheres [atm] * 1,013.25
- Hectopascals [hPa] ≈ standard atmospheres [atm] ÷ (9.869 * 10-4)
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from standard atmospheres [atm] to hectopascals [hPa] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
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Inches of mercury
Bar
Inches of mercury
Decapascals
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Hectopascals
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