CPM means Cost Per Mille (cost per 1,000 impressions). It’s calculated as (Ad Spend / Impressions) × 1,000.

Is CPM the same as RPM?

No. CPM is an advertiser metric (spend per 1,000 impressions). RPM is a creator/publisher metric (revenue per 1,000 pageviews or impressions), after the platform’s share and other factors.

No. This tool runs locally. Share links store only the numbers in the URL query.

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CPM Calculator (Cost Per Mille)

Calculate CPM from ad spend and impressions, or reverse-calc budget/impressions. Local-only.

Input

Choose what to calculate. Leave the target field blank.

Calculate

Ad spend

Impressions

CPM (per 1,000 impressions)

Formula: CPM = (Spend ÷ Impressions) × 1,000. Use this to compare campaigns or estimate budget needs.

Result

CPM

—

Spend

—

Impressions

—

Cost per 1 impression

—

Quick compare

Value

Meaning

CPM

—

$/1,000 impressions

CPI

—

$/1 impression

Enter values and calculate.

Tips

CPM is great for comparing awareness campaigns.
Creators often track RPM (revenue), not CPM (spend).
If CPM jumps, check targeting, placement, seasonality, and competition.

Related tools

Disclaimer: This tool provides mathematical estimates. Actual ad costs and reported impressions may vary by platform, attribution rules, fraud filtering, and reporting delays.

How to use

1) Choose a mode

Select whether you want to calculate CPM, spend, or impressions.

2) Enter the other two

Fill in the known values and leave the target as-is.

3) Compare campaigns

Use CPM to compare awareness costs across platforms or dates.

What this tool does

CPM (Cost Per Mille) measures how much you pay for 1,000 ad impressions. It’s commonly used in display/video advertising to benchmark reach cost.

If you’re a creator/publisher, you’ll often see RPM (Revenue Per Mille), which reflects what you earn per 1,000 pageviews/impressions after the platform share.

FAQ

Can CPM be used to measure ROI? + What’s a “good” CPM? + Is my data uploaded? +