Just look it up on the UESP. Get the base damage of each weapon and use the table under Smithing.
http://www.uesp.net/wiki/Skyrim:Ancient_Nord#Draugr_Weapons
http://www.uesp.net/wiki/Skyrim:Dragon_Armor#Dragonbone_Weapons
http://www.uesp.net/wiki/Skyrim:Ancient_Nord#Ancient_Nord_Armor
http://www.uesp.net/wiki/Skyrim:Smithing#Item_Quality
Thanks. So let me get this right. If I have 91 smithing that makes weapons/armor legendary, then my Nord Hero Battle Axe will do 31 dmg, as a base, correct? Now if I have 100 One handed and all barbarian perks, how much will it do, how do I figure that out?
Try checking these links out:
http://www.uesp.net/wiki/Skyrim:One-handed
http://www.uesp.net/wiki/Skyrim:Two-handed
By the way, Battle Axes fall into the two-handed category and War Axes fall into the one-handed category.
These are only available after you complete the companions questline and talk to Eorland Grey-Mane. Also, they can only be forged at the Skyforge.