Tons (register) to tons (freight) conversion calculator above calculates how many tons (freight) are in 'X' tons (register) (where 'X' is the number of tons (register) to convert to tons (freight)). In order to convert a value from tons (register) to tons (freight) (from RT to FT) just type the number of RT to be converted to FT and then click on the 'convert' button.