Is there a way to know how much damage minions deal?

Unlike other active skills if I hover my mouse over the skill a tooltip appears with detailed information including damage, summoning skills do not show damage in the tooltip.

Is there a way to know in the game? Or is there a tool/website that can calculate it?

EDIT:

I'm asking this question specifically for my necromancer build and the summoning skills I use are raise zombies, spectres, skeletons, and animate guardian.

Solution 1:

Basic HP and damage of minions are determined by gem level and then multiplied by the sum of all bonuses (from passive skills, from support gems, and from equipment mods). Basic stats have no effect on minions.

As far as I'm aware there's no calculator for this - PoB gets close but doesn't cover everything.