Atmospheres (technical) to hectopascals conversion calculator above calculates how many hectopascals are in 'X' atmospheres (technical) (where 'X' is the number of atmospheres (technical) to convert to hectopascals). In order to convert a value from atmospheres (technical) to hectopascals (from at to hPa) simply type the number of at to be converted to hPa and then click on the 'convert' button.