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CPM Calculator - Calculate Cost Per Thousand Impressions

Calculate CPM, or cost per thousand impressions, from advertising spend and impressions. Add an optional planned budget to estimate impressions at the same CPM.

Ad Spend, Impressions and Planned Budget

Use the same impression definition and reporting scope throughout. CPM describes cost per thousand impressions, not unique reach or guaranteed attention.

Enter the cost associated with the same impression total.
Enter total ad impressions from the same campaign, placement or reporting scope as the cost.
Project impression volume under a constant-CPM planning scenario. This is not a reach forecast.
CPM-
Cost per Impression-
Impressions per $1,000 Spent-
Projected Impressions at Planned Budget-
Additional Impressions vs Current Volume-
Planning Note-

Example: $5.00 CPM

Advertising cost: $2,500

Impressions: 500,000

CPM: $5.00

Cost per impression: $0.0050

Impressions per $1,000 spent: 200,000

Planned budget: $4,000

Projected impressions at same CPM: 800,000

Additional impressions: 300,000

The sample inputs shown here match the default calculator values so the example can be reproduced directly.

CPM Calculator Formulas

CPM = (Advertising Cost / Impressions) x 1,000Cost per Impression = Advertising Cost / ImpressionsProjected Impressions = (Planned Budget / CPM) x 1,000

Input Checklist

Same scope: Match ad spend and impressions to one campaign, placement, network or reporting segment.Same period: Do not mix spend and impressions from different date ranges.Same impression definition: Standard impressions, viewable impressions and unique reach are different measures.

Add This CPM Calculator to Your Website

Embed this free calculator on a marketing, PPC or analytics resource page. The ?embed=1 view keeps the calculator focused and supports responsive iframe resizing.

Embedding requirement: Keep the SolveIndex attribution and source link visible and unchanged.
  
Marketing - Google Ads & PPC
Understand CPM before comparing impression costs
Read the detailed guide for CPM meaning, formula logic, vCPM, reach and frequency, benchmark caveats, CPC relationships and budget planning.
Read the CPM Calculator guideBrowse all guides
CPM Calculator Frequently Asked Questions
It means the selected advertising scope cost an average of $5 for every 1,000 recorded impressions.
No. CPM uses impressions under the relevant reporting definition. Viewable CPM focuses on viewable impressions and can use a different denominator and bidding model.
Not necessarily. Cheap impressions can be valuable for reach, but performance still depends on audience quality, CTR, conversion rate, CPA, ROAS and the actual business goal.
You can calculate it, but interpretation changes by network and ad format. Compare like with like and keep impression definitions consistent.
Treat it as a constant-CPM scenario. Real inventory, targeting, frequency, competition, bids and seasonality can change the price of impressions as spend changes.
Use the closest metric for the decision you are making instead of combining every advertising ratio into one number.
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CPM Calculator Disclaimer: Results are planning estimates based on the inputs and definitions you provide. Advertising auctions, attribution, conversion lag, demand, competition, measurement settings and business costs can change actual performance. Use current account data and professional judgment for material budget decisions.