U-549 had a displacement of  when at the surface and  while submerged. The U-boat had a total length of , a pressure hull length of , a beam of , a height of , and a draught of .
U-549 had a displacement of  when at the surface and  while submerged. The submarine had a total length of , a pressure hull length of , a beam of , a height of , and a draught of .