Ad Campaign Calculator
Free Ad Campaign Calculator, turn spend and clicks into CPM, CPC, CPA and ROAS
Enter what you already know about a campaign, the spend, impressions, clicks, conversions and revenue, and get every metric that matters worked out consistently: CPM, click-through rate, cost per click, conversion rate, cost per acquisition, ROAS, profit and ROI. Then read the plain-language funnel summary underneath, which points at the step that is leaking and tells you whether each sale earns more than it costs. Nothing is uploaded and nothing is stored; the maths runs entirely in your browser.
- 100% free
- No sign-up
- Nothing uploaded
- Runs in your browser
Every paid channel speaks the same handful of metrics, and almost everyone quotes them a little wrong. CPM is priced per thousand impressions while CPC is priced per single click, so they are off by a factor of a thousand and easy to transpose. Cost per acquisition and conversion rate measure the same step from opposite ends, so people cite both and contradict themselves. ROAS is a ratio and ROI is a percentage of the very same two numbers, and they get used interchangeably in the same meeting. The result is that a campaign gets judged on whichever metric happens to look good, the definitions drift between reports, and a channel that quietly loses money on every sale keeps running because nobody put the cost per conversion next to the revenue per conversion. Working it out by hand is not hard, it is just fiddly and error-prone: a dozen divisions, each with a denominator that might be zero, done under time pressure in a spreadsheet that someone will copy wrong next week. This tool fixes the definitions in one place. Enter the raw counts once and every metric is computed the same way every time, so the numbers in your report agree with each other. Then, instead of leaving you to interpret a grid of ratios, it reads the funnel back to you and names the step that is holding the campaign back. The page is free and public; you only sign in to copy the summary out.
What it does, and why it's built this way
What the campaign metrics actually mean
The metrics describe one funnel, from an ad being shown to money coming back, and each one measures a single step of it. CPM, cost per thousand impressions, is what you pay to be seen, and it is priced per thousand because a single impression is worth a fraction of a penny. CTR, the click-through rate, is the share of people who saw the ad and clicked it, which measures whether the creative and targeting are earning attention. CPC, cost per click, is what each of those clicks costs you, and it falls as your CTR rises for a given CPM. Conversion rate is the share of clicks that turn into a sale, a lead or a sign-up, which measures the landing page and the offer rather than the ad. CPA, cost per acquisition, is the spend divided by those conversions, the true price of a customer. And when you add revenue, ROAS tells you how many units of revenue each unit of spend brought back, while ROI states the same relationship as a profit percentage. This tool computes all of them from the same counts, so you can see the whole funnel at once instead of one metric in isolation.
The funnel read is the point, not the grid
A grid of eight ratios is not an answer, it is homework. The genuinely useful question is which step is costing you, and that is exactly what a table of numbers hides. So under the metrics this tool writes the funnel back in plain language, drawn from the same figures. If your click-through rate is healthy but your conversion rate is weak, it says so and points you at the landing page rather than the ad, because that is where the traffic is leaking. If the reverse is true, it points at the creative and targeting instead. Most importantly, when you enter revenue it puts the cost per conversion next to the revenue per conversion and states the one thing that decides whether to keep spending: whether each sale earns back more than it cost to win. A campaign can post a proud-looking click-through rate and still lose money on every order, and that sentence is the one a grid of metrics will never say out loud. Because the words are generated from the same counts as the numbers, the read can never disagree with the figures above it.
Private, instant, and free to use
The calculator runs entirely in your browser. The spend, clicks and revenue you type are used to do arithmetic on your own machine and are never sent to a server, never logged and never stored against your account, which matters because campaign numbers are commercially sensitive and there is no reason for a calculator to keep them. Everything recomputes as you type, so you can try a what-if, halve the CPC or double the conversion rate, and watch the profit move in real time. The whole page and its guidance are free and public, because the point of these tools is to be the resource marketers actually open, not a gated demo. The one action that asks for a free account is copying the summary out, the same soft sign-in the rest of the platform uses, and it exists only to keep a free public tool from being scripted against at scale. Read the page, run as many campaigns through it as you like, and sign in once when you want to take a clean summary with you.
How to use it
- 1
Enter your spend
Start with the amount spent on the campaign and choose your currency. Spend on its own does not produce a metric, but every cost figure, CPM, CPC and CPA, is divided out of it, so it is the number everything else leans on.
- 2
Add the counts you have
Fill in impressions, clicks and conversions from your ad platform. You do not need all of them: enter impressions and clicks and you get CPM, CTR and CPC; add conversions and you also get conversion rate and CPA. Each metric appears as soon as it has the two numbers it needs.
- 3
Add revenue to see profit
If you know the revenue the campaign produced, enter it. That unlocks ROAS, ROI, the profit figure and, most useful of all, the per-sale margin read that compares what a conversion costs with what it is worth.
- 4
Read the funnel and copy the summary
Look at the plain-language notes under the grid: they name the leaking step and tell you whether the campaign is profitable. When the picture is clear, sign in once and copy a tidy summary of every input and metric to paste into a report or a message.
Common mistakes
Confusing CPM with CPC
CPM is the cost of a thousand impressions and CPC is the cost of one click, so they sit a thousandfold apart. Quoting a CPM where a CPC belongs makes a campaign look a thousand times cheaper than it is. This tool labels each one and computes it from the right count, so the two can never be swapped by accident.
Judging a campaign on ROAS alone
ROAS compares revenue to ad spend and ignores the cost of the product, fulfilment and everything else. A ROAS above one can still lose money once real costs are in. Read the per-sale margin note this tool shows and, where you can, enter revenue net of cost of goods so the profit figure reflects actual margin, not just top-line revenue.
Optimising the ad when the landing page is the problem
A strong click-through rate feeding a weak conversion rate means the ad is doing its job and the page is not. Pouring more budget or creative effort into the ad will not fix a page that does not convert. Let the funnel read point you at the weaker step, then work on that step rather than the one that is already healthy.
Reading metrics with no conversions recorded
If conversion tracking is not firing, the platform reports clicks but zero conversions, and CPA and ROAS become meaningless or infinite. Before drawing any conclusion from a campaign with no conversions, confirm the tracking is working. This tool refuses to invent a cost per acquisition out of zero conversions and says so plainly.
Frequently asked questions
- Which metrics can I calculate with this tool?
- From spend and impressions you get CPM and, with clicks, CTR and CPC. Adding conversions gives you conversion rate and CPA. Adding revenue gives you ROAS, ROI, total profit and the revenue per conversion. You do not need every field: each metric appears as soon as the two numbers it depends on are present, so a half-filled form still produces everything it can.
- What is a good ROAS or CPA?
- There is no universal number, because it depends entirely on your margins. A business with a fifty per cent gross margin needs a very different ROAS from one selling at a ten per cent margin to break even. That is why this tool focuses on your own figures rather than industry averages: enter your revenue and it shows whether each sale earns back more than it cost you, which is the only benchmark that actually decides whether the campaign is working.
- Is my campaign data kept private?
- Yes. Every calculation runs in your browser on your own device. The spend, clicks, conversions and revenue you enter are never sent to a server, never logged and never stored against your account. Campaign numbers are commercially sensitive, and a calculator has no reason to keep them, so it does not. You can close the tab and nothing about your campaign remains anywhere.
- How is CPC related to CPM and CTR?
- They are three views of the same auction. CPC, your cost per click, equals CPM divided by ten, divided by your click-through rate as a percentage. In practice that means for a fixed CPM, a higher click-through rate buys you cheaper clicks, because you are getting more clicks out of the same thousand impressions. This tool computes all three from your raw counts, so you can see exactly how a change in one moves the others.
- Does the ROI here include the cost of the product?
- Only if you tell it to. The ROI and profit figures are simply revenue minus spend, so they treat the ad spend as the only cost. If you want them to reflect true margin, enter revenue that is already net of your cost of goods and fulfilment, or read them alongside the per-sale margin note and subtract your product cost yourself. The tool is explicit that its profit is revenue minus ad spend, so you are never misled about what it includes.
- Is the calculator free?
- Yes. The tool, the page and all of its guidance are free, with no cap on how many campaigns you run through it. A free account is needed only to copy the summary out, which keeps a free public tool from being scripted against at scale. Reading the page and using the calculator on screen needs no account at all.
Need this done properly, at scale?
The tool handles the one-off. When it's a system you're building, that's the paid version of the job, and we do that too.
SEO Services