Power Attack and Overhand Chop Question

[Troy Loney]

I need some help figuring this out.
I am 3rd level fighter with 20 strength using Great Sword.
I need to know my total damage bonus if I do a full power attack WITH overhand chop.
2d6+?
Herolab doesn't have overhand chop so I can't just add it and click on it to use in play.

[idilippy]

You would do double your strength bonus for overhand chop, then add the Power attack damage to it. In your specific case you would do 2d6+13 damage with a power attack.