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