You need know atk of your weapon with 0 talics and how much atk yours buffs give Exemple: leon bow 55 3966 +0 if you got all 25% atk amulets/rings = 100% Adventurer class buff give 15% + 40% atk potion +10%atk of superior armor(5 parts) + 20% atk leon ability give = 185% atk bonus 3966 x 1,85(to calculate, take the total percentage, and changes 2 times to the left side and put the comma) =7337 add weapon +0 damage = 11303 total damage of bow leon 55 if wanna know how much atk get with +3,+4,+5 talics you need do this. +5 talics keen = 80% atk bonus 3966 x 0,80 = 3172 (the amount increases with the talics, you should only add to the damage already'd take with the weapon +0 and not multiply with their elemental, potions etc ...) 11303 total damage of weapon with no upgrade + 3172 thats 5 talic give = 14475 total damage I see many players making mistakes in calculating when atk the player would have with certain weapons. this tutorial was to help not make mistakes when they buy weapons, or even trade with other players. if you know how much atk your buff give and damage of weapon +0, you can do this to know atk of all weapons. if someone use this method and give a different result, please put it here because this method worked for every time that i calculated. Sorry for bad english, i using a translator.