HMS Calcutta was the East Indiaman Warley, converted to a Royal Navy 56-gun fourth rate. This ship of the line served for a time as an armed transport. She also transported convicts to Australia in a voyage that became a circumnavigation of the world. The French 74-gun Magnanime captured Calcutta in 1805. In 1809, after she ran aground during the Battle of the Basque Roads and her crew had abandoned her, a British boarding party burned her.

East Indiaman was a general name for any sailing ship operating under charter or licence to any of the East India trading companies of the major European trading powers of the 17th through the 19th centuries. The term is used to refer to vessels belonging to the Austrian, Danish, Dutch, English, French, Portuguese or Swedish companies.