B-Roll Ratio Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 28, 2026B-Roll Ratio Calculator
Wondering if your edit has enough visual variety? This calculator checks your B-roll coverage against a commonly cited healthy range.
B-Roll Percentage = ((Total Runtime - A-Roll Time) / Total Runtime) x 100
Example
A 10-minute video with 7 minutes of main A-roll footage:
B-Roll Time = 180 seconds → 30.0% B-roll - Healthy B-roll balance
Why B-Roll Matters in Edited Content
B-roll (supplementary cutaway footage) breaks up talking-head monotony and covers jump cuts in edited interviews, giving viewers something visually engaging to look at while the primary audio narration or interview continues underneath.
The Commonly Cited Healthy Range
A commonly cited healthy range for many video styles is roughly 20-50% B-roll coverage, though this varies significantly by genre and format - a documentary interview segment might lean toward the higher end, while a straightforward talking-head vlog might use much less.