TikTok hashtag reach estimator

A planning estimate, not a measurement. The number that matters is unique reach, and it is always lower than the impressions add up to.

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Posts in the campaign Every post carrying the hashtag. Average views per post Use the median if one post is an outlier. Creators involved More creators means less overlap. Audience overlap (%) How much of each audience has already seen another post.

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Impressions

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Estimated unique reach

Overlap is the number this rests on and the one nobody can know without measuring. Treat the result as a range, not a figure — if you need the real one, pull the posts and count the distinct accounts.

Why impressions and reach are different numbers

Adding up the views on every post in a campaign gives you impressions, and impressions double-count. The same person scrolls past three posts in a campaign and is counted three times, which is how a campaign that reached forty thousand people gets reported as reaching a hundred and twenty thousand.

Unique reach discounts for that. The discount is the overlap between the audiences, and it goes down as you spread a campaign over more creators — four creators in different niches overlap far less than four in the same one. Thirty to forty per cent is a reasonable default for a single-niche campaign; ten to fifteen for a deliberately spread one.

If the difference matters commercially, estimate it once and then measure it. Pull the posts carrying the hashtag, pull the accounts that engaged with each, and count the distinct ones. That is a real number, and it is the thing this calculator is guessing at.

What overlap should I use?

Thirty to forty per cent for creators in one niche, ten to fifteen for a campaign spread across unrelated audiences. If the creators share followers heavily — the same scene, the same city — it can be above fifty.

Why is views the input rather than followers?

Because TikTok distribution is not follower-driven. A post from a small account can outreach a post from a large one, so follower count predicts reach badly here in a way it does not on other platforms.

Can I measure this properly instead?

Yes, and you should if it matters. Pull every post carrying the hashtag and the accounts that engaged with each, then count the distinct accounts. That is what our hashtag and comments endpoints are for.

Doing this at volume?

These are calculators. The API behind them returns TikTok profiles, videos, comments, followers, sounds and hashtags as typed JSON — billed per result delivered, from $0.50 per thousand, with no subscription. New accounts get free credits to try it.

Start free — no card See the TikTok API