All you civically engaged Philly residents out there might want to add this website to your many open tabs: the Sixty-Six Wards turnout tracker.

First rolled out in May for the primaries, the site — built by urban demographer Jonathan Tannen on his blog — relies on voters’ self-reported ward, division, time of day and voter numbers, plus historic turnout data when there’s no voter data, to project how many Philadelphians will hit the polls this Tuesday.

As of 12:30 p.m., 599 voters in 45 wards had shared their voter number, leading Tannen’s projections to put the turnout estimates at 244,736. For context, with about seven hours of voting to go, Philly is already relatively close to its 2014 turnout threshold of just over 380,000.

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