Quarts (US liquid) to deciliters conversion calculator above calculates how many deciliters are in 'X' quarts (US liquid) (where 'X' is the number of quarts (US liquid) to convert to deciliters). In order to convert a value from quarts (US liquid) to deciliters (from qt to dL) just type the number of qt to be converted to dL and then click on the 'convert' button.