Viewability Rate (Viewability) Calculator
Measure the percentage of served ad impressions that actually appeared in the user's viewable screen area.
Calculate Viewability Rate (Viewability)
Viewability Rate (Viewability) Formulas & Reverse Equations
Use these standard and algebraic reverse formulas in spreadsheets, agency decks, or media plans:
Solve for Viewability
Viewability Rate = (Viewable Ad Impressions ÷ Total Ad Impressions) × 100Solve for Viewable Ad Impressions
Viewable Ad Impressions = (Total Ad Impressions × Viewability Rate) ÷ 100Solve for Total Ad Impressions
Total Ad Impressions = (Viewable Ad Impressions × 100) ÷ Viewability RateUnderstanding Viewability Rate (Viewability)
Viewability Rate separates served ad impressions from seen ad impressions. Because web pages load placements below the fold or in background tabs, tracking Viewability Rate ensures your media budget buys genuine human exposure rather than invisible ad calls.
When to Use Viewability Rate (Viewability)
Use Viewability Rate during programmatic placement audits, publisher QBRs, and pre-bid verification filtering (IAS, DoubleVerify, MOAT).
Industry Benchmarks & Planning Context
IAB and agency benchmarks commonly target a minimum 70% Viewability Rate for display inventory and 75%–85%+ for digital video.
Frequently Asked Questions About Viewability
How is Ad Viewability Rate calculated?
Divide the number of viewable ad impressions by the total number of measured ad impressions served, then multiply by 100: Viewability Rate = (Viewable Ad Impressions ÷ Total Ad Impressions) × 100.
How do I use Viewability Rate to calculate vCPM?
Multiply your total impressions by your Viewability Rate to find Viewable Impressions, or simply divide your served CPM by the Viewability Rate (expressed as a decimal). For example, a $15 CPM at 75% (0.75) viewability equals a $20.00 vCPM.