About this calculator
The Facebook Ads Cost Calculator estimates key campaign metrics — like clicks, leads, and cost per lead — from your monthly ad spend, cost per click, and conversion rate.
How are the estimates calculated?
Estimated clicks come from dividing ad spend by cost per click, and estimated leads come from multiplying those clicks by your lead conversion rate. From there, cost per lead is simply ad spend divided by the number of leads generated.
Why estimate ad costs in advance?
Facebook's actual ad auction pricing varies constantly based on audience targeting, competition, industry, and campaign objective, so real costs will differ from any estimate. Still, projecting these numbers ahead of time helps with setting a realistic monthly budget and figuring out roughly how much spend is needed to hit a lead generation target, before you start refining based on real campaign data.