Setting a paid budget by gut feel leads to under-spending on what works or pouring money into what does not. This calculator works from your acquisition target back through your conversion rates to the budget you actually need, so your spend is sized to your goal.
Enter your target, your cost per click or lead, and your conversion rates, and it shows the budget required and how sensitive it is to your funnel performance. It turns budgeting from a guess into a plan you can defend.