Gallons (US liquid) to pecks (UK) conversion calculator above calculates how many pecks (UK) are in 'X' gallons (US liquid) (where 'X' is the number of gallons (US liquid) to convert to pecks (UK)). In order to convert a value from gallons (US liquid) to pecks (UK) (from gal to pk) just type the number of gal to be converted to pk and then click on the 'convert' button.