The cpc and cpm calculator works out click-through rate (ctr) and cost per mille (cpm) from the values you supply. Enter clicks, total cost, impressions, and the calculator applies the standard relationship straight away, so you get the answer without working through the algebra yourself.
What Is the CPC and CPM Calculator?
It is built around click-through rate (ctr), cost per mille (cpm), cost per click (cpc), and it works the same way whether you are checking a homework answer, confirming a colleague's figure, or working something out for yourself. Everything runs in your browser, so nothing you enter is uploaded anywhere.
How the CPC and CPM Calculation Works
The steps are applied in order, so an output that depends on another output updates as soon as the underlying figures change.
The relationship between clicks, total cost, impressions and click-through rate (ctr), cost per mille (cpm), cost per click (cpc) is fixed, so the same figures always give the same answer. That makes it a good cross-check: run the numbers a second way and see whether the result agrees.
Getting a Result You Can Trust
Start with a set of figures you are confident about. If one of the clicks or total cost or impressions values looks wrong, the result will be wrong too, because everything downstream is built on top of it. Work through the outputs one at a time and check that each one is the size you would expect before relying on the last figure.
Frequently Asked Questions
What do I need to work out click-through rate (ctr)?
Enter clicks, total cost, impressions. The calculator then works through the relationship and reports click-through rate (ctr), cost per mille (cpm), cost per click (cpc).
What does the cpc and cpm actually calculate?
It takes clicks and total cost and impressions and converts them into click-through rate (ctr), cost per mille (cpm), cost per click (cpc) using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter clicks?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Why does a small change in one value move the answer so much?
That happens when an output depends on a ratio, because dividing by a small number magnifies any change in it. Check the units first, then check whether the value you entered is in the range the relationship was designed for.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.