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PlanB Digital

Free tool

Ad ROI Calculator

Plug in your budget, cost per click and conversion rates to see the leads, customers and profit your ads could bring in, before you spend a cent.

Start from a typical channel

Estimated monthly profit after ad spend

$6,000

Every $1 in ads returns $5.00 in revenue.

Clicks
1,111
Leads
50
Customers
13
Cost per lead
$60
Cost per customer
$240
Revenue
$15,000
ROAS
5.00x
ROI
200%
Break-even cost per customer
$720

Estimates only. Real results depend on targeting, creative, landing page and follow-up.

How to forecast ad results

Every paid campaign follows the same funnel: budget buys clicks, clicks become leads, and leads become customers. Small changes at each step multiply, which is why a better landing page often beats a bigger budget.

The formulas behind the calculator

  • Clicks = budget ÷ cost per click
  • Leads = clicks × conversion rate
  • Customers = leads × lead-to-customer rate
  • ROAS = revenue ÷ ad spend
  • Profit = revenue × margin − ad spend

Start with conservative numbers, run a test budget, then replace the estimates with your real data. If the cost per customer is above the break-even figure, fix conversion before scaling spend.

FAQs

What is a good ROAS?

It depends on your margins. A business with 60% gross margin breaks even at about 1.7x ROAS, so many aim for 3x or more. Use the break-even figure in the calculator for your own numbers.

What is the difference between ROAS and ROI?

ROAS is revenue divided by ad spend. ROI also accounts for your margin, so it shows the actual profit after the cost of the product or service and the ads.

What's a typical cost per click?

Google Search averages a few dollars per click, while Facebook and Instagram are often around one dollar. Competitive industries like legal or home services can be much higher.

How can I improve my results?

The biggest levers are usually landing page conversion rate and lead follow-up. Raising either one improves every number below it without spending more on ads.

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