British thermal units (59 °F) to joules converter on this page calculates how many joules are in 'X' British thermal units (59 °F) (where 'X' is the number of British thermal units (59 °F) to convert to joules). In order to convert a value from British thermal units (59 °F) to joules type the number of British thermal units (59 °F) to be converted to J and then click on the 'convert' button.