Decaliters to gallons (UK) conversion calculator shown above calculates how many gallons (UK) are in 'X' decaliters (where 'X' is the number of decaliters to convert to gallons (UK)). In order to convert a value from decaliters to gallons (UK) (from daL to gal) type the number of daL to be converted to gal and then click on the 'convert' button.