British thermal units (59 °F) to watt hours conversion calculator above calculates how many watt hours are in 'X' British thermal units (59 °F) (where 'X' is the number of British thermal units (59 °F) to convert to watt hours). In order to convert a value from British thermal units (59 °F) to watt hours type the number of British thermal units (59 °F) to be converted to Wh and then click on the 'convert' button.