Assemblyman Zohran Mamdani’s strong performance in New York City’s Democratic mayoral primary last Tuesday turned him into a national figure overnight, as his upstart campaign overtook that of the longtime front-runner, former Gov. Andrew Cuomo. But it was not enough to make him the official nominee.

That victory is likely to come on Tuesday.

Since Mr. Mamdani received less than 50 percent of the vote in the first round of counting, a runoff was triggered under New York City’s relatively new ranked-choice voting system. The system allows voters to rank up to five candidates in order of preference. Now, the candidates with the least first-choice support will be eliminated, round by round, and their votes redistributed to voters’ next choices.

The Board of Elections will release the ranked-choice results on Tuesday, one week after the primary. Here’s what to know:

When will the results be available?

The ranked-choice voting results are slated to be released online at noon, according to a news release from the Board of Elections.

What will they include?

The Board of Elections said it would report the tally of all the ballots that were counted during the city’s nine days of in-person early voting and on Primary Day, as well as mail-in ballots received and processed by Primary Day.

The board plans to release updated numbers weekly on Tuesdays until all ballots are counted and final results certified. The final results will include absentee ballots.

There were 11 candidates in the race. With an estimated 93 percent of the vote counted last Tuesday, Mr. Mamdani had the support of 43.5 percent of the city’s Democratic primary voters, leading Mr. Cuomo by about seven percentage points.