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Free tool · AI B2B ads
CPC vs CPM Calculator
ChatGPT ads, LinkedIn and most DSPs let you pay per click or per thousand impressions. Enter both prices and your click-through rate to see which is cheaper per click, the CTR where they break even, and what your cost-per-lead target can afford.
- Free, no sign-up
- Runs in your browser
- Checked 19 October 2026
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How it works
How to use the CPC vs CPM Calculator
- Enter the CPM and CPC prices you can buy at, or pick an example to start.
- Enter your real click-through rate for the same audience.
- Read the verdict, the break-even CTR and the max CPC your lead target allows.
| What | How it's worked out |
|---|---|
| Effective CPC on CPM | CPM ÷ (1,000 × CTR) |
| Break-even CTR | CPM ÷ (10 × CPC), in % |
| Highest CPM worth paying | CPC × CTR × 10 |
| Max CPC for target CPL | Target cost per lead × conversion rate |
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How to use the result
- Buy CPC while CTR is unknown. On CPM you carry the risk of a weak ad; on CPC the platform does. Switch an ad group only after its CTR has held above break-even for a few weeks.
- Judge CTR per ad group, not per account. Decision-stage questions often have lower CTR and better companies. Averages hide that.
- Check the lead maths before the bid. If the max CPC is below both prices, the problem is the landing page or the target, not the pricing model.
- Early ChatGPT benchmarks are thin. The one published B2B pilot reported a 0.66% CTR at $5.68 a click. Treat it as a reference point, not a target.
Read next
- CPC or CPM? The break-even CTR that decides itWhen to buy on CPC and when on CPM, with one formula: break-even CTR = CPM ÷ (10 × CPC). Worked examples for ChatGPT ads and LinkedIn, the risk each model shifts to…
- CPC, CPM or conversion bidding: which should B2B use in ChatGPT ads?Which ChatGPT ads objective and bidding fits B2B: views (CPM), clicks (CPC) or conversions (oCPC, oCPM), when to switch, and what you actually pay for.
- How much do ChatGPT ads cost for B2B?ChatGPT ads cost for B2B in 2026: minimum budgets ($25 a day in the US, £15 in the UK), reported CPC and CPM, a published B2B pilot and a budget planner.
- Early benchmarks for B2B AI adsThe early benchmark figures available for B2B AI ads in 2026: ChatGPT ad costs, a published B2B pilot, LinkedIn comparisons and AI traffic data, with caveats.
Questions
Straight answers.
When is CPM cheaper than CPC?
When your click-through rate is above the break-even CTR, which is CPM ÷ (10 × CPC). At a $40 CPM and a $5 CPC the break-even is 0.8%: above it, CPM costs less per click.
Can I buy ChatGPT ads on CPC?
Yes. OpenAI added cost-per-click buying in 2026 alongside CPM. Check which bidding options Ads Manager shows for your campaign objective.
Why does CTR matter so much?
On CPM you pay for every impression, so the cost per click is the CPM divided by how many people click. Halve the CTR and the effective CPC doubles.
Does this work for LinkedIn and display?
Yes. The maths is the same on any platform that sells both CPM and CPC. Only the prices and CTRs change.
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Sources: OpenAI: New ways to buy ChatGPT ads; Windmill Strategy: ChatGPT ads B2B pilot; ClickMinded: LinkedIn Ads benchmarks.
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