Chance to hit help

[Galithar]

Can someone give me the correct formula for chance to hit with advantage?

Example. I'm attacking an AC 16 with a hit bonus of +7. So I hit on a 9 or higher, or 60% of the time. How do I currently calculate my chance to hit with advantage?

[Tanarii]

Advantage chance to hit is 1-(1-hit)^2 or 1-miss^2

So for 60% chance to hit it is 1-(1-.6)^2 or 1-.4^2 or .84 for 84% chance to hit.

[Galithar]

So more simply written 1-(chance to miss)^2 correct?
Just to clarify because that's a few less buttons pressed into the calculator haha

[ad_hoc]

Multiply chance to hit by chance to miss. Then add the chance to hit.

Example:


Chance to hit: 60%
= 40% miss chance

.6 x .4 = .24

60+24=84

[Galithar]

Awesome. Three different methods that all give the same answer haha. Thanks guys.