算我一个。

You usually drop this phrase at the end of a conversation. Someone proposes a lunch spot or a weekend trip. You simply say, 算我一个！ It functions as a complete sentence. You don't need to add fancy grammar. It is like raising your hand in a group chat. It works perfectly in person or over text. Just make sure the 'plan' is already clear before you say it.

Use it whenever a group is forming for something fun. If friends are ordering milk tea, say it. If colleagues are going for a quick walk, say it. It’s great for social bonding. It works well in casual office settings too. If a boss asks who wants to volunteer for a fun project, this shows initiative. It’s the verbal equivalent of a 'plus one' RSVP.

Don't use this for very serious or somber events. You wouldn't say 算我一个 for a funeral or a high-stakes medical procedure. That would feel a bit too 'casual' or 'excited.' Also, avoid using it if the invitation wasn't open. If two people are discussing a private date, jumping in with this phrase would be awkward. It’s for group activities, not for crashing private moments. Don't use it if you are the one organizing—you are already in!

Chinese culture highly values 'togetherness' or 热闹 (rènao). Being part of the group is important. By saying 算我一个, you are showing you are a 'team player.' It reflects a communal spirit. In the past, this might have been used when splitting a bill or sharing a harvest. Today, it’s the heartbeat of social life in cities like Beijing or Shanghai. It’s how you stay connected in a fast-paced world.

You might hear 加我一个 (jiā wǒ yī gè), which means 'add me.' They are almost identical. If you want to be more emphatic, you can say 一定要算我一个！ This means 'You MUST count me in!' If you are talking about a pair, you could technically say 算我们两个, but that’s less common. Stick to the classic version for maximum impact. It’s short, sweet, and gets you invited to the next hotpot dinner.