Fluid drams to gallons (US dry) converter above calculates how many gallons (US dry) are in 'X' fluid drams (where 'X' is the number of fluid drams to convert to gallons (US dry)). In order to convert a value from fluid drams to gallons (US dry) (from fl dr to gal) simply type the number of fl dr to be converted to gal and then click on the 'convert' button.