Ångström is not an SI unit
input_unit and output_unit can be set to atomic or si, however setting it to si does not change the length unit to the si unit meter, but instead to the non-si unit Ångström.
input_unit and output_unit can be set to atomic or si, however setting it to si does not change the length unit to the si unit meter, but instead to the non-si unit Ångström.