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Ad budget from a sales plan calculator

Enter the sales plan in units, the lead-to-sale conversion rate, and the cost per lead. The calculator works out the required number of leads and budget.

Result

Budget required

Leads required

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This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Leads required = sales plan ÷ (conversion rate ÷ 100). Budget required = leads required × cost per lead. The calculation works in two steps: first the sales plan is converted into a lead plan through the funnel conversion rate, then the lead plan into money through the cost per lead.

Both the conversion rate and cost per lead are held constant over the period in this calculation — in practice, as traffic volume purchased grows, cost per lead usually rises, and conversion can either rise or fall depending on the quality of the new traffic.

If lead-to-sale conversion is known separately but the actual cost per lead isn't yet clear, the separate ad budget from a target CAC calculator is more convenient for budget planning — it relies on the final customer cost rather than an intermediate funnel stage.

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