Impression Share Calculator
Measure Your Ad Visibility
Instantly calculate your Google Ads impression share, lost IS (rank), and lost IS (budget). Understand your true ad visibility and find optimization opportunities.
What is the Impression Share Calculator?
A critical PPC metric tool that measures what percentage of eligible ad impressions your campaign actually received. Enter your impressions and eligible impressions (or use lost IS data) — we calculate impression share, lost impression share due to rank, and lost impression share due to budget.
Impression share reveals how much of the available ad inventory you're capturing. Low impression share means you're leaving traffic (and revenue) on the table. Identify whether budget or ad rank is your bottleneck and optimize accordingly.
Everything you need to track ad visibility
From search IS to lost impression reasons — complete PPC visibility analytics.
Search Impression Share
Percentage of eligible search impressions your ads received. Core metric for Google Ads performance.
Lost IS (Rank)
Percentage of impressions lost because your ad rank was too low. Fix with better keywords, bids, or quality score.
Lost IS (Budget)
Percentage of impressions lost because your daily budget was exhausted. Increase budget to capture more traffic.
Top Impression Share
Percentage of impressions showing in top positions (above organic results). Higher = better visibility.
Absolute Top IS
Percentage of impressions showing as the very first ad. The most valuable position.
Opportunity Calculator
See how many additional impressions you could capture by fixing rank or budget issues.
How the Impression Share Calculator works
Two inputs → complete visibility analysis.
Enter Your Impressions
Actual impressions your ads received
Enter Eligible Impressions
Total available impressions
Add Lost IS Data (Optional)
From Google Ads dashboard
Get Full Analysis
IS %, lost to rank/budget, opportunity
Low impression share = leaving money on the table
Here's why tracking impression share is essential for PPC success.
Every impression you don't get is a potential customer going to a competitor. Low IS = revenue leakage.
Lost to rank? Improve quality score or bids. Lost to budget? Increase daily spend. Know exactly what to fix.
Show leadership that increasing budget by X% could capture Y additional impressions and Z additional revenue.
Impression share reveals your share of voice in the auction. Low IS means competitors are outbidding you.
If lost to rank is high, work on quality score (cheaper than raising bids). If lost to budget, increase spend.
Impression share insights for every PPC role
From in-house managers to agency specialists — actionable ad visibility data.
PPC Managers & Specialists
- Track campaign visibility trends
- Identify budget vs rank constraints
- Optimize bids and quality score
- Report impression share to stakeholders
- Set impression share targets
Digital Marketing Agencies
- Demonstrate client account health
- Identify upsell opportunities (budget increases)
- Prove optimization impact
- Benchmark across client portfolios
- Win renewals with visibility gains
Ecommerce & DTC Brands
- Maximize product ad visibility
- Capture more shopping traffic
- Allocate budget to high-IS campaigns
- Beat competitors in auctions
- Scale profitable campaigns confidently
Marketing Directors & VPs
- Measure overall paid search health
- Justify PPC budget allocation
- Compare performance across channels
- Set team impression share KPIs
- Optimize marketing mix
Built on Google Ads standard metrics
Same impression share formulas used by Google Ads and PPC experts — completely free.
Impression share formula
Your Impressions ÷ Eligible Impressions × 100 = Impression Share %. Google Ads standard.
Lost IS breakdown
Lost IS (Rank) = Ad rank too low. Lost IS (Budget) = Budget exhausted. Our calculator uses both.
No data storage
All calculations run locally in your browser. Your campaign data never leaves your device.
SEOScaleUp vs. spreadsheets & paid PPC tools
Free, sophisticated, and private — no subscription required.
| Feature | SEOScaleUp ✓ | Manual Spreadsheet | Paid PPC Tool |
|---|---|---|---|
| Search impression share calculation | ✓ | ~ | ✓ |
| Lost IS (Rank) breakdown | ✓ | ✗ | ✓ |
| Lost IS (Budget) breakdown | ✓ | ✗ | ✓ |
| Top impression share calculation | ✓ | ✗ | ✓ |
| Absolute top impression share | ✓ | ✗ | ✓ |
| Opportunity/impression calculator | ✓ | ~ | ✓ |
| Export IS report | ✓ | ✓ | ✓ |
| No signup / private | ✓ | ✓ | ✗ |
| Monthly price | $0 | $0 | $29-199 |
Impression share questions answered
Everything about IS metrics, optimization, and Google Ads visibility.
Know your true ad visibility in seconds
Join 500,000+ PPC professionals who use SEOScaleUp to calculate impression share. No signup, no fees, complete privacy.