Monetisation Metrics Explained: CPC, CTR, RPM and eCPM (2026)

Amol Ghemud
Monetisation Metrics Explained: CPC, CTR, RPM and eCPM (2026)
Published: December 10, 2025

Contributors: Amol Ghemud
Published: December 10, 2025

Summary

Monetisation metrics are 5 numbers measuring the same revenue from different angles: CPC per click, CTR per impression, CPM per 1,000 impressions bought, RPM per 1,000 page views and eCPM per 1,000 ad impressions. This guide gives Google’s published formula for each, then runs 1 month through the chain: 100,000 page views and 300,000 ad impressions at a 1% ad CTR and a Rs 10 CPC give Rs 30,000, a Rs 300 page RPM and a Rs 100 eCPM.

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Monetisation metrics are the numbers that decide what your traffic is worth: CPC, CPM, CTR, RPM and eCPM. They measure the same money from different angles, and publishers lose revenue by treating them as interchangeable.

This guide gives the formula Google publishes for each metric and runs 1 month of numbers through all 5, so you can watch a Rs 10 click become a Rs 300 page RPM. Every formula links to the help page it came from.

What Are Monetisation Metrics? CPC, CTR, RPM and eCPM Defined

CPC is what you earn each time a user clicks an ad. CTR is the share of impressions that led to a click. RPM is estimated revenue per 1,000 page views. eCPM is revenue per 1,000 ad impressions. CPC and CTR describe individual ads, while RPM and eCPM roll everything up to the page or the ad slot.

The difference that trips people up is the denominator. CTR and eCPM count ad impressions; RPM counts page views. One page view carries several ad impressions, so the 2 numbers never match.

CPC, CPM, CTR, RPM and eCPM: definitions and formulas as published in Google AdSense Help and Google Ad Manager Help (checked September 2026)
Metric	What it measures	Formula Google publishes	Where you see it	What moves it
CPC (cost per click)	What you earn when a reader clicks an ad	No formula: the advertiser sets it in the auction	AdSense	Advertiser demand, topic, country
CPM (cost per mille)	What an advertiser pays per 1,000 impressions	"the cost per 1000 impressions"	AdSense and Ad Manager	Buy type and inventory quality
CTR (clickthrough rate)	The share of impressions that led to a click	Ad CTR = Clicks / Ad impressions; Page CTR = Clicks / Page views	AdSense	Placement, format, ad relevance
RPM (revenue per mille)	Estimated revenue per 1,000 page views	(Estimated earnings / Number of page views) x 1000	AdSense	CPC, CTR and ads per page combined
eCPM (effective CPM)	Revenue per 1,000 ad impressions	Revenue / impressions x 1000	Ad Manager and Ad Exchange	The mix of CPC and CPM demand won

CPC and CTR: What a Click Pays and How Often Clicks Happen

AdSense defines CPC as “the amount you earn each time a user clicks on your ad” and CTR as “the percentage of impressions that led to a click”. You move CTR through layout and placement. CPC is decided somewhere you cannot reach.

CPC Is Set by the Advertiser, Not by You

Google is direct: “The CPC for any ad is determined by the advertiser”, and some will pay more per click than others. Behind that sits an auction, where advertisers “bid to show in your ad spaces in a real-time auction” and the highest paying ad wins the slot. Your lever is the audience you bring to that auction.

Ad CTR and Page CTR Are 2 Different Numbers

AdSense reports both, and mixing them up makes benchmarks meaningless. Ad CTR is clicks divided by ad impressions: 5 clicks on 1,000 ad impressions is a 0.5% ad CTR. Page CTR is clicks divided by page views: 2 clicks across 250 page views is 0.8%. Both examples are Google’s own. An impression, meanwhile, counts for each ad request where at least 1 ad has begun to download.

RPM in Digital Marketing: Revenue Per 1,000 Page Views

RPM tells you what 1,000 page views are worth. AdSense gives the formula as (Estimated earnings / Number of page views) x 1000. It is the metric to quote when you compare 2 months or 2 sites, because it already contains CPC, CTR and ads per page.

The Formula, With Google’s Own Example

Google’s worked case: $0.15 from 25 page views gives a page RPM of ($0.15 / 25) x 1000, or $6.00. The same structure on impressions makes $180 from 45,000 ad impressions a $4.00 ad RPM. We recomputed both against the published figures.

RPM Is a Rate, Not a Payout

Google states plainly that RPM “doesn’t represent how much you’ve actually earned”. A Rs 300 page RPM is a rate per 1,000 page views, not a Rs 300 payment. Our guide to website ad RPM vs sessions walks through the 3 RPM figures AdSense and GA4 show for the same month.

eCPM vs RPM: What the Difference Actually Means

eCPM is revenue per 1,000 ad impressions; AdSense RPM is revenue per 1,000 page views. Ad Manager defines eCPM as “revenue per one thousand impressions”, revenue divided by impressions times 1,000. Put 3 ad slots on a page and RPM reads roughly 3 times eCPM.

Why eCPM Exists at All

Some ads pay per click, others per impression. Google pays “based on user clicks on ads or on ad impressions, depending on the type of ad”. eCPM converts both into 1 rate per 1,000 impressions, the only honest way to rank a CPC-heavy unit against a CPM-heavy one. CPM alone is just “the cost per 1000 impressions” an advertiser agreed to pay.

Ad Manager Gives You 3 eCPM Denominators

In Ad Manager the number shifts with where in the delivery chain you measure it. Google lists 3 denominators and notes that the further down the chain it sits, the higher the figure.

Ad requests eCPM: revenue / ad requests x 1000, the most conservative.
Matched request eCPM: revenue / responses served x 1000.
Impressions eCPM: revenue / impressions x 1000, the highest.

How CPC, CTR and RPM Connect: 1 Worked Month

The 5 monetisation metrics are 1 chain, not 5 dials. Ad impressions times ad CTR gives clicks, clicks times CPC gives earnings, earnings over page views times 1,000 gives RPM. Here is a personal finance site running that chain for a month.

100,000 page views in the month
3 ad impressions per page view, so 300,000 ad impressions
Ad CTR 1%, so 3,000 clicks
Average CPC Rs 10, so Rs 30,000 in estimated earnings

The rest falls out. Page RPM is (30,000 / 100,000) x 1000 = Rs 300. eCPM, or ad RPM, is (30,000 / 300,000) x 1000 = Rs 100. Page CTR is 3,000 / 100,000 = 3%. That Rs 300 sits inside the Rs 250 to Rs 830 finance band in our guide to AdSense earnings in India (upGrowth estimate, September 2026).

The 50% Lift That Needs No Extra Traffic

Hold everything else still and lift average CPC from Rs 10 to Rs 15, which is what a shift toward higher-demand topics and Tier-1 readers buys. The same 3,000 clicks return Rs 45,000. Page RPM moves to Rs 450, eCPM to Rs 150, page CTR stays at 3%. That is a 50% gain, Rs 15,000 a month, on identical traffic.

What You Keep After Google’s Share

Those figures are gross. Google states publishers “receive 80% of the revenue, after the advertiser platform takes its fee”, and about 68% via Google Ads demand. At 80%, the Rs 30,000 month is Rs 24,000 and the Rs 45,000 month is Rs 36,000. Use the net figure for an AdSense break-even point.

What Moves Your Monetisation Metrics

Google’s earnings page names traffic volume, content type, user location, ad setup and seasonality as what moves your earnings. Only the first needs new visitors. Add session depth and you have 5 levers you can pull on the traffic you already have.

Topic and Advertiser Demand

Google lists content type as a factor, and the auction explains why. More advertisers bidding on finance, insurance or software keywords means higher winning bids and a higher CPC. Lifestyle content draws fewer bidders for the same impression.

Where Your Readers Are

Google names user location as a factor. Advertisers in the US, UK, Canada and Australia bid in stronger auctions, so a reader from those markets is worth more per impression. Tier-2 and Tier-3 traffic still earns well at high session depth, but arrives with a lower CPC.

Ad Formats and Placement

This is the lever you control outright. Auto ads scan a site and “automatically place ads where they’re likely to perform well”, using anchor, vignette, side rail, banner and multiplex units. Each extra unit raises impressions per page view, lifting RPM even when eCPM holds flat. Test on mobile first, using mobile AdSense optimisation principles.

Session Depth

A reader who opens 3 pages generates 3 times the ad impressions of one who bounces, at no extra acquisition cost. Session depth lifts earnings and page RPM together while leaving eCPM untouched, which is why internal linking is a revenue lever.

Seasonality

Google confirms that seasonality affects earnings, and names currency exchange rates too. Advertiser budgets concentrate around Q4 retail, back-to-school and financial year-end, then thin out in early Q1 and mid-year.

Monetisation Metrics: Frequently Asked Questions

What is the difference between eCPM and RPM?

The denominator. Ad Manager defines eCPM as revenue per 1,000 ad impressions, while the RPM AdSense shows is earnings per 1,000 page views. One page view can carry several ad impressions, so RPM reads higher. In our worked month, 100,000 page views carrying 300,000 ad impressions gave a Rs 300 page RPM and a Rs 100 eCPM, exactly 3 times apart.

What is RPM in digital marketing?

RPM means revenue per mille, or revenue per 1,000. AdSense calculates it as estimated earnings divided by page views, multiplied by 1,000. Google is explicit that RPM does not represent what you actually earned; it is a rate for comparing periods or sites. Google’s own example: $0.15 from 25 page views is a $6.00 page RPM.

How are CTR and CPC related?

CTR tells you how often an ad is clicked, CPC tells you what each click pays. Multiply them and you get revenue per impression, which is where eCPM comes from. You control CTR through placement, format and relevance. CPC is set by the advertiser in Google’s auction, so you move it only by changing your audience and topic.

Is a higher CTR always better for ad revenue?

Not on its own. A 4% CTR on Rs 2 clicks earns less than a 1% CTR on Rs 15 clicks at the same impression count. CTR only pays when CPC holds up, which is why RPM is the better scoreboard: it already contains CTR, CPC and ads per page in 1 trackable figure.

What is a good CTR, CPC or RPM for my site?

There is no universal benchmark, because Google names content type, user location, ad setup and seasonality as the drivers. Compare against your own history, not someone else’s screenshot. For Indian publishers we see page RPM of roughly Rs 40 to Rs 830 by topic, and CPC of Rs 4 to Rs 83 (upGrowth estimates, September 2026).

Do monetisation metrics show gross or net revenue?

Gross. Google states publishers receive 80% of the revenue after the advertiser platform takes its fee, and about 68% when advertisers buy display ads through Google Ads. A Rs 30,000 month at a Rs 300 page RPM leaves Rs 24,000 at the 80% share. Use the net figure for break-even planning.

Your Next Move

Pull last month’s AdSense report and write down 4 numbers: page views, ad impressions, clicks and estimated earnings. Every monetisation metric here falls out of those 4, and together they name your weak link.

Model the scenarios with our free marketing calculators, weigh ad revenue against commission income in our guide to AdSense vs affiliate marketing, or book a 30 minute call with upGrowth.

About the Author

Amol Ghemud

Optimizer in Chief

Amol has helped catalyse business growth with his strategic & data-driven methodologies. With a decade of experience in the field of marketing, he has donned multiple hats, from channel optimization, data analytics and creative brand positioning to growth engineering and sales.

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