VCR
GeneralVideo Completion Rate
The percentage of video ad views that play through to completion — a key indicator of creative quality and audience attention for video advertising campaigns.
Definition
Video Completion Rate (VCR) measures the percentage of video ad views that play through to full completion, out of all views that started. It is a key indicator of how well a video ad's creative holds audience attention across its full duration, distinct from metrics like reach or impressions that only measure initial exposure.
VCR is especially important for video-specific ad formats (pre-roll, in-stream, social video) where advertisers want to know not just whether a video started playing, but whether the full message — including a closing call-to-action or brand reveal — actually reached the viewer.
Formula
Video Completion Rate = (Number of Completed Views / Total Video Starts) × 100
Some platforms report completion at intermediate quartiles as well:
Quartile Completion Rate (25%/50%/75%) = (Views reaching that quartile / Total Video Starts) × 100
Worked Example
A brand runs a 30-second video ad campaign across a social platform:
| Metric | Value |
|---|---|
| Total video starts | 50,000 |
| Views reaching 25% | 40,000 |
| Views reaching 50% | 30,000 |
| Views reaching 75% | 22,000 |
| Views completing 100% | 15,000 |
| Video Completion Rate | 30% |
VCR = (15,000 / 50,000) × 100 = 30%
The steep drop-off between the 50% and 75% marks (30,000 to 22,000) suggests the middle section of the video is losing viewer attention — a strong signal for the creative team to tighten pacing in that segment. Use the Video Completion Rate calculator to compute VCR and quartile drop-off from your own view data.
Key Things to Know
- Video length has an outsized effect on VCR: Shorter videos consistently achieve higher completion rates than longer ones, so VCR should only be compared across ads of similar length rather than treated as a length-agnostic quality score.
- Quartile analysis pinpoints where viewers drop off: Reviewing completion at 25%, 50%, and 75% milestones (not just the final 100% figure) reveals exactly where in the video attention is lost, guiding specific creative edits.
- VCR and CPV measure different things: CPV tracks cost per qualifying view (often a partial-watch threshold), while VCR tracks how many of those views go the full distance — a campaign can optimize for a low CPV while still having a low completion rate if the message payoff is placed too late.
- Front-loading key messages protects against low VCR: Since many viewers won't reach the end, placing the brand name, offer, and call-to-action early ensures the core message lands even for viewers who drop off before completion.
- VCR should be read alongside engagement rate: A video with strong completion but low post-view engagement (clicks, shares) may be entertaining without being persuasive — both metrics together give a fuller picture of creative effectiveness.
Frequently Asked Questions