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Ad Spend Calculator

Plan an ad budget from a target cost per acquisition and the conversions you want, or from a CPM and planned impressions. The ad spend calculator also splits it per day and week.

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Plan the budget from

Ad budget
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How to use the Ad Spend Calculator

  1. Choose to plan the budget from a Target CPA or from CPM × impressions.
  2. Enter the target and volume, and the Campaign length in days.
  3. Press Calculate. The total budget appears with the daily and weekly amounts.

How it works

budget from CPA = target cost per acquisition × conversions wanted
budget from CPM = CPM × planned impressions ÷ 1,000
daily budget = budget ÷ days

Examples

  • 400 conversions at a $25 target CPA: $10,000, or $333.33 a day over 30 days.
  • 1,000,000 impressions at an $8 CPM: $8,000.

Setting a realistic target CPA

Start from what a customer is worth. If an average order brings $80 of profit, a CPA above $80 loses money on the first sale. Subscription or repeat businesses can accept a higher CPA if they know the lifetime value of a customer.

Limitations

  • Assumes costs stay steady as you scale. In practice, CPA often rises when budgets grow.
  • Platform fees and creative costs are not included.

Frequently asked questions

How much should I spend on ads?

Work backwards from your goal: conversions needed times the CPA you can afford.

What is CPA?

Cost per acquisition: the ad cost of one sale, sign-up, or other conversion.

How do I split a monthly budget into a daily one?

Divide by the number of days the campaign runs. Most ad platforms ask for a daily budget.

Often used together with Ad Spend Calculator.