How is TikTok completion rate calculated?

Average watch time divided by video length, times 100. Rewatches can exceed 100%. A missing or zero length has no rate.

What if length is missing or zero?

A missing or zero denominator is unmeasured. This page prints an em dash — never a fabricated 0, 0%, or $0.00 rate.

Is this a live campaign figure?

No. The figure is computed in this browser from the numbers you typed. A live TrueWave campaign also names the cycle, the counted platforms, and the age of the scrape.

How should a brand use this when briefing creators?

Ask for average watch time and the cut length on the same post you will count delivery.

Tools › Measure

TikTok completion rate calculator

Last changed 2026-09-15

Retention is average watch time over cut length, not a vibe.

Average watch time (seconds)

From the post analytics. Rewatches count.

Video length (seconds)

The cut length. A missing or zero length has no rate.

Target completion percent

Optional. Used only for the watch-time needed line.

Completion rate

—

Average watch time / video length × 100.

Watch time to hit 50% · —

Counted

The numbers you type on this page

Window

The reporting window you name

Age

Planning estimate — not a live platform pull

Method

How the number is made

Completion rate = average watch time / video length × 100. Rewatches can exceed 100%. A missing or zero length has no rate.

A missing or zero denominator is an em dash, never a fabricated zero.

FAQ

Questions this page answers

How is TikTok completion rate calculated?: Average watch time divided by video length, times 100. Rewatches can exceed 100%. A missing or zero length has no rate.
What if length is missing or zero?: A missing or zero denominator is unmeasured. This page prints an em dash — never a fabricated 0, 0%, or $0.00 rate.
Is this a live campaign figure?: No. The figure is computed in this browser from the numbers you typed. A live TrueWave campaign also names the cycle, the counted platforms, and the age of the scrape.
How should a brand use this when briefing creators?: Ask for average watch time and the cut length on the same post you will count delivery.

Also

Other campaign tools

TikTok follower growth calculator
Project the date a creator hits a hiring threshold.
Instagram Reels engagement rate calculator
Reels engagement is actions over Reel views.
Creator campaign CPM calculator — views, spend, window
CPM is campaign spend over observed views. Zero views is not a rate.
All creator-campaign tools

Run it as a measured campaign

TrueWave operates human creator campaigns: scripts, measured views, spend and CPM. Write if you want that run for a brand.

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Questions this page answers

How is TikTok completion rate calculated?: Average watch time divided by video length, times 100. Rewatches can exceed 100%. A missing or zero length has no rate.
What if length is missing or zero?: A missing or zero denominator is unmeasured. This page prints an em dash — never a fabricated 0, 0%, or $0.00 rate.
Is this a live campaign figure?: No. The figure is computed in this browser from the numbers you typed. A live TrueWave campaign also names the cycle, the counted platforms, and the age of the scrape.
How should a brand use this when briefing creators?: Ask for average watch time and the cut length on the same post you will count delivery.