Ad Budget Calculator
Work backwards from the result you want. Enter your target, your conversion rate and your cost per click to see the monthly budget it actually requires.
Most budget decisions get made the wrong way round: a number is chosen because it sounds affordable, and the results are whatever that number happens to buy. Working backwards is more useful. Decide how many leads or sales you need, then let your conversion rate and cost per click tell you what that costs.
The conversion rate in this calculation is the one that surprises people. Doubling it halves the budget required for exactly the same outcome, which is why landing page work usually returns more than bid tuning. If you do not know your real conversion rate, measure it before committing to a budget; assuming an optimistic figure produces a plan that under-delivers from day one.
There is also a floor below which a budget cannot work regardless of arithmetic. Both Meta and Google need a certain volume of conversions before their algorithms exit the learning phase, broadly 30 to 50 per week per campaign. If the budget this calculator produces would deliver only a handful of conversions a month, spreading it across several campaigns guarantees that none of them learns. Consolidate into one campaign, or start on the platform where intent is highest so each rupee does more.
City matters too. The same target costs materially more in Mumbai or Bangalore than in Belgaum, because the auctions are crowded with funded bidders willing to pay above their own break-even. Run the numbers with a local cost per click rather than a national average, and if the resulting budget is out of reach, narrow the geography rather than accepting a spend too thin to escape the learning phase.
Frequently asked questions
- How much should a small business spend on Google or Meta Ads per month?
- Enough to produce roughly 30 conversions a month, which is the point at which the platforms have enough data to optimise. In practice that means about ₹30,000 to ₹50,000 a month for local services in a smaller city, and ₹60,000 to ₹1,00,000 for e-commerce in a metro. Below those levels, the account spends most of its life in the learning phase.
- Should I split my budget between Meta and Google?
- Not at the start. Splitting a modest budget across two platforms usually leaves both short of the conversion volume they need. Start where the intent is: Google Search if people already search for what you sell, Meta if you need to create the demand. Add the second platform once the first is profitable and documented.
- Does a bigger budget lower my cost per lead?
- Sometimes, briefly, because more conversion data helps the algorithm. Beyond a point it reverses: you exhaust the cheapest audiences and start paying more for each additional lead. Watch cost per lead as you scale, and step up in increments of 20 to 30% rather than doubling spend overnight.
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