If you're using target CPA or target ROAS smart bidding strategies, Google provides interesting simulations like the one below:
However, those simulations are missing a couple of key insights:
TrueClicks will provide you with 1 and 2 by default and if you enter your profit margin and variable cost per conversion per bid strategy, we'll calculate the profit-maximizing target ROAS or CPA for you.
So the bid simulator above gets enriched to an actionable table like the one below: