Pecks (US dry) to tons (register) conversion calculator shown above calculates how many tons (register) are in 'X' pecks (US dry) (where 'X' is the number of pecks (US dry) to convert to tons (register)). In order to convert a value from pecks (US dry) to tons (register) (from pk to RT) simply type the number of pk to be converted to RT and then click on the 'convert' button.