CPM, CPC & CTR Calculator
Enter any campaign's spend, impressions and clicks to get CPM, CPC and CTR together, so you can see which one is actually driving your costs.
These three metrics are linked by one equation: CPC equals CPM divided by ten, divided by CTR as a percentage. That relationship matters because it tells you which lever to pull. If your cost per click is rising, either the auction got more expensive or your creative stopped earning clicks, and CPM and CTR separate those two causes immediately.
A rising CPM with a steady CTR means competition, seasonality or audience saturation. Festive periods in India illustrate this plainly: CPMs climb 20 to 60% through the Diwali window and can triple during major sale events, with nothing wrong on your side. A falling CTR with a steady CPM is the opposite, and it is almost always creative fatigue or a mismatch between who you are reaching and what you are saying.
CTR is also the metric most worth treating carefully. A high click-through rate on the wrong audience produces expensive traffic that never converts, which is why chasing CTR for its own sake can make an account worse. The useful reading is CTR alongside conversion rate: both rising means the creative and the offer agree with each other, CTR rising while conversion rate falls means the ad is writing cheques the landing page does not honour.
For reference from accounts I have run: a D2C catalogue campaign held a ₹1.59 average CPC at a 2.02% CTR across a full quarter. That combination is only possible when CPM is reasonable and the creative genuinely earns attention, and it is far more informative than either number quoted alone.
Frequently asked questions
- What is a good CTR for Meta or Google Ads in India?
- For Meta, anything above roughly 1% on cold audiences is respectable and above 2% is strong. Google Search runs much higher because intent is explicit: 3 to 6% is normal and branded campaigns go far beyond that. Compare against your own account history rather than published benchmarks, because category and audience temperature change the figure more than country does.
- Why did my CPM suddenly increase?
- The usual causes are seasonal competition, a narrow audience being shown ads too frequently, a change in placement mix, or a new campaign competing against your own existing ones for the same people. Check frequency first: when it climbs past about 2.5 on a cold audience, you are paying more to reach people who have already decided.
- Is a low CPM good?
- Not by itself. CPM can fall because your ads moved to cheaper placements that convert worse. The metric that matters is cost per conversion. Use CPM to explain changes in CPC, and use cost per acquisition to judge whether the campaign is working.
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