How to calculate max damage.

Im trying to finish my guide called "The science of a pure" and i need help. How do i calculate my max damage with a weapon. Lets say i have 67 strength and im using a rune 2 hand. I tried to google this but found nothing. Thanks dudes.

 

I don't know the formula but here's a calculator. http://www.tip.it/runescape/?page=max_hit_calc.htm

 

Calculator helps. Thanks man. Im looking for the formula aswell.

 

While Jagex have never officially released it, the RS Wiki has a forumula on there Maximum melee hit page.

 

Thanks. Im trying to make an all in one runescape calculator with flash. I calculated 66str str potion ammy of str and rune stats and got 198 which is dead on. Btw since you both helped you will get the guide and the All in one TipMeBuilder for free. Shoot me a pm.