Choose your lottery number (or an estimate for it) in the box at the top. Select the checkbox if you are a sophomore. (This includes sophomore-only housing in your search.)
Then, choose the occupancy of the rooms you want to search for and the buildings to include, or exclude, in the search.
The probability bar represents how likely we think it is that you will get this room. This prediction is based on the room's performance in previous years and the lottery number you entered.
A full (green) bar means you have a good shot at getting this room. An empty (red) bar means your chances of getting this room are slim.
But don't trust us (too much). The prediction is based on results from previous years, which aren't necessarily predictive of future results. Some rooms may have few old results, affecting the quality of the prediction. Additionally, renovations of rooms and buildings may affect their desirability.
The actual calculation of the probability is performed by fitting a logistic model to a room's previous lottery numbers. We thank Neil Thakral for this suggestion.
Before the lottery, the availability data is updated based on the online lottery projection every two hours.
During the lottery, data will be updated every 30 seconds, and any changes to availability will be reflected in your result lists right away - no need to refresh the page!
Maybe. We got the information directly from the Lottery website and haven't verified it manually. Also, sometimes rooms change between years, making the past results less meaningful for calculating probability.
If you do find an inaccuracy in the data, we would appreciate it if you reported it to us: just send us an email.
Sure! The project code is on GitHub. Feel free to peruse (and contribute!).