Admux

Tool · as of 10 Nov 2026

AI ads budget calculator

Pick a channel and pricing model, enter your budget and your own CPM or CPC assumption, and see estimated impressions and clicks, the channel’s minimum and how much a single day can bill. No provider publishes a rate card, so the calculator never invents a price.

Facts verified Assumptions and sources

Estimate your reach

ChatGPT ads offers: Views (CPM), Clicks (CPC), Conversions (oCPC or oCPM); never billed per conversion. (OpenAI Help Center, verified 10 Nov 2026) For the Conversions objective, pick CPC (oCPC) or CPM (oCPM) to match how it bills.

Prefilled with $5, the top of OpenAI’s suggested $3–$5 starting maximum CPC bid. That is a bid suggestion, not an average price. Change it to your own assumption. (OpenAI Help Center, verified 10 Nov 2026)

No provider publishes an average CTR. Add your own to turn clicks into impressions.

Estimate for ChatGPT ads

Average daily budget
USD 71.43
Estimated impressions
Add a CTR to estimate
Estimated clicks
100

Meets the minimum. A 7-day ChatGPT ads campaign needs at least USD 175 at the USD 25 daily minimum. (OpenAI Help Center, verified 10 Nov 2026)

Daily spend ceiling. At USD 71.43 a day, a single day can bill up to USD 142.86, and any 7-day period up to USD 500. The daily budget is an average over 7 days: one day can bill up to 2×, and a 7-day period no more than 7× the daily budget. (OpenAI Help Center, verified 10 Nov 2026)

Estimates from your own assumptions, not a forecast. The auction sets the price you pay, so results aren’t guaranteed, and neither is placement in AI answers.

How the numbers work

Estimated impressions = budget ÷ CPM × 1,000. Estimated clicks = budget ÷ CPC. With a CTR assumption, clicks = impressions × CTR, or impressions = clicks ÷ CTR.

Minimums and spend ceilings come from each provider’s own documentation, listed below with the date we last read them. Prices are auction-set, so treat the output as a planning range for your own assumptions, not a forecast.

Nothing here is guaranteed. The auction sets the price you pay, delivery depends on demand, and no channel guarantees that your ad appears in an AI answer.

Assumptions and sources

Every rule the calculator applies, from the provider’s own pages. Verified 10 Nov 2026.

ChatGPT ads (OpenAI)

Minimum daily budget (self-serve)
USD 25 per day (varies by currency, e.g. EUR 15, GBP 15, CAD 25, AUD 25, JPY 2,500, INR 725)[1]
Daily budget behaviour
Average per day over 7 days; up to 2× on one day; no more than 7× over the 7-day period (Sunday–Saturday week)[2]
Campaign objectives and pricing
Views (CPM), Clicks (CPC), Conversions (oCPC or oCPM); never billed per conversion[1]
Recommended starting CPC bid
$3–$5 USD max CPC to start (a recommendation, not a reported average price)[3]
How price is set
Auction; the final winning auction bid sets the price paid[4]
Advertising Terms on minimums
Access doesn't guarantee inventory, delivery or 'any minimum spend or performance'[5]

Gravity

Minimum spend
No minimum; start with any daily budget. A payment method is required before a campaign can launch.[6]
Daily budget
Average daily budget in dollars; spend on one UTC day can reach 110%, then serving stops until the next day.[7]
Buying / pricing model
CPM (per 1,000 impressions), or CPA where the account allows it. No click (CPC) billing for new campaigns.[8]
Click billing
Not offered; billing_model cpm (cpc accepted only for older campaigns).[9]
Objective: CPA eligibility
Pay per attributed conversion; requires $5,000 lifetime spend or Gravity unlock.[7]

Google AI Mode and AI Overviews

Buying / pricing model
Same auction as Search; CPC or conversion-based bidding; no extra charge to participate.[10]
Daily spending limit
2x the average daily budget for most campaigns[11]
Monthly spending limit
30.4x the average daily budget for most campaigns[11]

Google minimum budget

Google publishes no minimum budget for ads in AI Overviews and AI Mode, so the calculator shows no minimum check for Google.

Questions advertisers ask

How does the calculator estimate impressions and clicks?

Estimated impressions are your budget divided by your CPM, times 1,000. Estimated clicks are your budget divided by your CPC. If you also enter a CTR, clicks are derived from impressions (or impressions from clicks). Every price and rate is your own assumption.

Why is there no default CPM or CPC?

No provider publishes a rate card. OpenAI, Gravity and Google sell these placements in auctions, and the price you pay depends on who else is bidding. A default “average” would be invented, so you enter your own figure.

Where does the $5 ChatGPT CPC come from?

From OpenAI’s Help Center. Prefilled with $5, the top of OpenAI’s suggested $3–$5 starting maximum CPC bid. That is a bid suggestion, not an average price. Change it to your own assumption.

What is the minimum budget for each channel?

ChatGPT ads have a minimum daily budget of USD 25 (other currencies differ), so a 7-day campaign needs at least USD 175. Gravity says there is no minimum. Google publishes no minimum budget.

Can a channel spend more than my daily budget in one day?

Yes, within limits. OpenAI treats the ChatGPT daily budget as a 7-day average: one day can bill up to 2×. Gravity can reach 110% on one UTC day. For most campaigns Google can bill up to 2× the average daily budget on a day, and no more than 30.4× in a month.

Are the results guaranteed?

No. They are arithmetic on your assumptions. The auction sets the price you pay, delivery depends on demand and competition, and no channel guarantees placement in AI answers.

Sources

Provider documentation

  1. Creating campaigns for ChatGPT Ads | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
  2. Billing & Payment | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
  3. Ads in ChatGPT: The Basics | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
  4. Bidding strategies and how pricing works in ChatGPT Ads | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
  5. Advertising Terms | OpenAIOpenAI · checked 10 Nov 2026
  6. AI Advertising FAQ | GravityGravity · checked 10 Nov 2026
  7. Campaigns - Gravity docsGravity docs · checked 10 Nov 2026
  8. Overview - Gravity docsGravity docs · checked 10 Nov 2026
  9. Campaigns (API reference) - Gravity docsGravity docs · checked 10 Nov 2026
  10. About ads in AI-powered experiences in Google Search - Google Ads HelpGoogle Ads Help · checked 10 Nov 2026
  11. About spending limits - Google Ads HelpGoogle Ads Help · checked 10 Nov 2026

Third-party CPM reports (ChatGPT)

Press reports from the managed beta and partner offers. They are not OpenAI figures and the calculator does not use them as defaults.

  1. Trending Topics: $60 CPMtrendingtopics.eu · published 16 Feb 2026
  2. PPC Land: $60 CPM (fixed during pilot)ppc.land · published 13 Apr 2026
  3. Digiday: $60 at launch → as low as $25; $25–$45 rangedigiday.com · published 17 Apr 2026
  4. Digiday: as low as $15 (Ad Age, via Digiday)digiday.com · published 17 Apr 2026
  5. Adweek: $15–$60 CPM (StackAdapt pilot)adweek.com · about 20 Apr 2026 (no dateline)
ChatGPT ads pricing tracker ChatGPT ads: all facts Gravity: all facts Google AI Mode ads: all facts AI ad networks compared