What is the likelihood of winning a typical online sweepstakes?

The likelihood of winning an online sweepstakes depends on how many entries one has, and how many total entries are in the sweepstakes. For example, if there are 100 total entries, and one has 5 entries into the sweepstakes, that person has a 5% chance of winning the prize. As with any contest, the more entries one has, and the smaller the total number of entries is, the better one's chances are.