HP can not be converted into CC.
HP can only be converted into KW (kilowatts).
depending on the different manufacturers a 1000 cc car can have widely different HP e.g. Suzuki swift 1000 cc - charade 1000 cc and charade Turbo 1000 cc etc.
HP is dependent on alot of things. and 2 exactly same cars with same engine can have different HP depending on the level of mods.
a simple things like adding straight through exhaust, and CAI can make upto 20 KW difference between the same spec cars.
Hopefully I have helped you 