Estimate your results
Start with a daily budget and how you pay. Add your conversion rate and what a conversion is worth to see your cost per conversion, return on ad spend and the most you can afford per click.
Estimate per month · 30.4 days
Clicks
Conversions
Cost per conversion
Return on ad spend
Ad spend
Impressions
Revenue from conversions
Break-even cost per click
Time to reach your target
Rules from OpenAI: minimum budgets, daily budgets, pricing basics. Estimates assume the campaign spends its full budget.
For planning, not a forecast. OpenAI’s auction decides what you pay and how often your ads show.
What the calculator assumes
- Your campaign spends its full budget. Campaigns can underspend when bids aren’t competitive or targeting is narrow. Ads Manager’s bid-strength guidance flags bids that may limit delivery.
- A month is 30.4 days, a year divided by 12. Daily budgets are averages over a budget week that runs Sunday to Saturday, so one day can spend up to twice the budget, and a week never more than seven times it.
- OpenAI’s minimums are built in. Each billing currency has a minimum daily budget per campaign, such as 25 USD, 15 EUR or 725 INR. Pick your currency and the calculator warns you when a budget is below it. The full table is on our availability tracker.
- You supply the cost per click or per 1,000 impressions. OpenAI sets actual costs in a relevance-weighted, second-price auction, so swap the starting figure for Ads Manager’s average CPC or CPM once you have data.
- Conversions come from clicks. Conversion-optimized campaigns bill per click or per impression, never per conversion, so pick the matching option. With impression billing, OpenAI can also count conversions that follow a view; this calculator leaves those out.
- No invented benchmarks. We haven’t found official figures for click-through rate, conversion rate or CPM, so those fields start empty.
- Ad spend only. Our fees are separate: see pricing.
How the numbers are worked out
Every figure in the calculator shows its working underneath. These are the formulas behind them.
| Figure | Formula |
|---|---|
| Ad spend | Daily budget × 30.4 |
| Clicks, paying per click | Daily budget ÷ cost per click × 30.4 |
| Impressions | Daily budget ÷ CPM × 1,000 × 30.4 |
| Clicks, paying per impression | Impressions × click-through rate |
| Conversions | Clicks × conversion rate |
| Cost per conversion | Ad spend ÷ conversions |
| Revenue | Conversions × value per conversion |
| Return on ad spend | Revenue ÷ ad spend |
| Break-even cost per click | Value per conversion × conversion rate. Pay more per click and ad spend outruns revenue. |
| Break-even CPM | Value per conversion × conversion rate × click-through rate × 1,000 |
| Time to your target | Target conversions ÷ conversions per day |
A worked example
Say a sale is worth $100 to you and 3% of the people who click go on to buy. Your break-even cost per click is $3: $100 × 3%.
That’s the bottom of the $3–5 range OpenAI suggests for starting maximum bids. If clicks cost $5, you’d need a 5% conversion rate, or orders worth about $167, to break even. Open this example in the calculator.
Illustrative numbers, not benchmarks.
Where to find your inputs
- Conversion rate and value go together. Use purchases with average order value, or leads with what a lead is worth. Your analytics has the rate; paid traffic is the closest match.
- Value per conversion. For leads, multiply your close rate by your average deal value. Enter gross margin instead of revenue if you want to break even on profit.
- Cost per click. Start near OpenAI’s suggested $3–5 maximum bid, then use the average CPC from Ads Manager once your ads run.
- CPM and click-through rate. Ads Manager reports both. Until you have your own, estimates in per-impression mode are guesses.
Checking whether ChatGPT Ads are available where your business is based? See the availability tracker.
Sources
- Ads in ChatGPT: the basics, OpenAI Help Center: billing, the auction, suggested bids and reporting. Checked 27 September 2026.
- Create campaigns, OpenAI Help Center: the minimum daily budget for each billing currency and the Sunday-to-Saturday budget week. Checked 27 September 2026.
- Daily budgets, OpenAI Help Center: pacing and the fixed-bid budget rule. Checked 27 September 2026.
- Conversion-optimized campaigns, OpenAI Help Center: billing options and view-through conversions. Checked 27 September 2026.