Retargeting only works if you can actually hit your audience often enough to convert. This calculator plugs in your audience size, target frequency, and CPM/CPC ranges to tell you what budget you need.
Works for Facebook, Instagram, and web-based retargeting platforms like AdRoll.
Plug in audience size and frequency goals to get a working monthly budget.
Convert click-through expectations into ad-spend forecasts.
Use the same model for Facebook, Instagram, and web retargeting.