Calculator for fruit additions?

[eulipion2]

Are there any recipe calculators that will calculate the addition of whole fruits to recipes for the sake of Original Gravity? I know it's really not too important, but for the sake of entering it into competitions, they need to know strength for some reason.

Thanks in advance.

EDIT: This is for meads primarily, but I'm a stickler for note taking, so it'd be nice to have for my beers too.