How the count works
The counter searches X for the account's posts, or the hashtag's, between two exact times, and counts the results by UTC day. Search finds older posts than an account's timeline does, which stops after its most recent few hundred posts. For a longer window, a different time zone, or more than about 200 posts, run the same count from code with our guide to counting tweets.
For one account's lifetime total and its average posts a day, the account age checker reads the post count on the profile. To see how a very busy account posts, read our 30-day count of how often Elon Musk tweets.