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Advertising Budget Calculator

Work backwards from a conversion target to the budget you need.

Marketing Tools Reviews Free · no sign-up

Budget required

—

Clicks needed—
Cost per conversion—
Projected ROAS—

Quick Tool Overview

The Advertising Budget Calculator works backwards from a conversion target, using your conversion rate and cost per click to say how many clicks you need and what that budget has to be.

What it does
Calculates the ad budget a conversion target requires
You give it
Target conversions, conversion rate, cost per click, optional order value
You get back
Clicks needed, required budget, cost per conversion and projected ROAS
Best for
Setting a budget you can actually justify to someone
Marketing Tools Free, unlimited use No sign-up Runs in your browser

About the Advertising Budget Calculator

Most ad budgets are set by picking a round number and hoping. Working backwards from the outcome is more defensible: decide how many conversions you need, then let the maths say what that costs.

Enter your conversion target, the landing page conversion rate you realistically expect, and your average cost per click. The calculator works out how many clicks that target requires, what those clicks cost, and therefore what the budget has to be — along with the resulting cost per conversion.

Add a value per conversion and it checks the plan against itself, showing projected revenue, profit and ROAS so you can see whether the budget you just calculated is one worth spending at all.

Key features of the Advertising Budget Calculator

Works backwards from the goal

Starts with the outcome you need, not a round number.

Sanity check built in

Add order value and it shows whether the budget is worth spending.

Daily budget included

Set a campaign length and the daily spend is worked out too.

Formula shown

Every step is written out with your own numbers in it.

How to use the Advertising Budget Calculator

  1. 1

    Set your conversion target

    How many sales, leads or signups the campaign needs to deliver.

  2. 2

    Enter your conversion rate

    Use your own historical rate rather than an optimistic guess.

  3. 3

    Enter average cost per click

    From your ad platform, or a keyword planner estimate for a new campaign.

  4. 4

    Add value per conversion

    Optional — it shows whether the budget is actually worth spending.

Frequently asked questions

Clicks needed = Target conversions ÷ Conversion rate. Budget = Clicks needed × Cost per click. Wanting 50 conversions at a 2.5% conversion rate needs 2,000 clicks, which at 1.80 per click means a 3,600 budget.

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