Where do you stand?
Answer a few short questions. This page works out your state's deadline and shows you where that leaves you - using the same statute text that's on the state pages, just applied to your dates instead of you doing the arithmetic yourself. It asks about the specific conditions that change the answer in your state, but no calculator can ask about everything a court might consider - read the caveats it shows you.
The day you returned keys or the landlord could re-enter - not the day you signed the lease.
Michigan gives you 7 days from this date to mail back a written objection.
Why this stays free and doesn't ask you to sign up
This tool counts days and shows you the statute text that applies to the number it lands on, using the dates you enter. It doesn't estimate what you're owed in dollars, and it doesn't tell you what to do next - what to make of the result, and whether to rely on it, is a call for you or a lawyer to make. What it does do is save you the arithmetic and surface the specific conditions and exceptions we know about, so you can check whether any of them change your answer before you act on it.
If you want to put what you find here in front of your landlord, thefree documentation tool builds a dated photographic record, and everystate page links straight to the statute itself.