Before you put money into Pinterest ads it helps to know what the budget can realistically buy. This calculator works both ways. Give it a daily budget and a number of days to see impressions, clicks, conversions and cost per acquisition, or give it a conversion target to see the total and daily budget you would need.
Ad prices on Pinterest vary a lot by country, audience, season and how good the creative is, so the calculator does not pretend to know your costs. The CPM, CPC and conversion rate in the form are example assumptions only. Replace them with numbers from your own Ads Manager reports, or from a small test campaign, before trusting the result.
How the ad cost math works
Total spend = daily budget × days. Impressions = spend ÷ CPM × 1,000. Clicks = spend ÷ CPC. Conversions = clicks × conversion rate. Cost per acquisition (CPA) = spend ÷ conversions. Return on ad spend (ROAS) = conversions × order value ÷ spend.
CPM and CPC together imply a click-through rate: CTR = CPM ÷ (CPC × 10). If that implied CTR looks unrealistic for your past pins, one of the two cost assumptions is off, and the calculator warns you.
Lowering your cost per result
On Pinterest, the creative does a lot of the work. A promoted pin with a clear benefit in the title, readable text at phone size and a matching landing page usually earns a better click rate, which lowers the cost of each click and sale. Test several designs at once with the pin variations generator and check them with the mobile preview.
Compare the CPA here with your profit per order, not your revenue. If CPA is higher than the profit on a sale, the campaign loses money even when ROAS looks positive. The Pinterest ROI calculator helps you compare paid and organic results.