If you’re counting down the days to the total solar eclipse (or a partial solar eclipse, depending where you live), you’ll probably want to know exactly how much you’ll see of it based on your location. Which is why you’ll want to check this handy calculator from the US Naval Observatory.

Should you not know your exact longitude and latitude, no worries. Click on “need US location?” and type in your zip code and it will tell you exactly when it starts, when it ends, and how much of it (“obscuration”) you’ll get.

Solar Eclipse Calculator: Finding out when it will happen in your city

So in Brooklyn, it looks like we’ll be starting around 6:10 P.M., with a roughly 90% eclipse peaking at 7:25 P.M.

If you’re more of a visual learner, this NASA map details the exact path of the April 8 solar eclipse, as seen up top.

Just don’t forget to have your solar eclipse glasses ready, even if you’ll only see a partial eclipse.

More great tips on the solar eclipse:
5 expert tips for watching the total solar eclipse with kids
7 easy galaxy-themed treats to make the solar eclipse more fun
Here’s how to get solar eclipse glasses for free.
Easy solar eclipse party ideas for a once-in-a-lifetime bash

Top image: NASA/Scientific Visualization Studio/Michala Garrison; eclipse calculations by Ernie Wright, NASA Goddard Space Flight Center