Cubic yards to gallons (US liquid) conversion calculator shown above calculates how many gallons (US liquid) are in 'X' cubic yards (where 'X' is the number of cubic yards to convert to gallons (US liquid)). In order to convert a value from cubic yards to gallons (US liquid) (from cu yd to gal) just type the number of cu yd to be converted to gal and then click on the 'convert' button.