Facebook ads can be a growth engine for ecommerce brands. But they can also be a fast way to burn through budget if the numbers don't stack up for your business. The tricky part is that most people don't check the math before they start spending.

Stirling's free Facebook Ads ROI Calculator fixes that — and it takes half a minute to use.

Two numbers, one clear answer

You don't need to understand cost-per-click or click-through rates to use this tool. You just enter your average customer value and the monthly budget you're considering, and it does the rest. It runs your numbers against real Facebook advertising benchmarks — actual cost-per-lead data, real conversion rates, current average costs — and tells you straight: yes, Facebook ads make sense for your business, or no, they don't.

No sign-up. No sales call. No spreadsheet required.

Why this saves you money

The most expensive way to find out if Facebook ads will work for you is to just start spending and see what happens. A lot of store owners have been there — months of testing, thousands of dollars, and a frustrating conclusion that "Facebook ads don't work." Sometimes that's true. But often the problem was simply that the budget was too low, or the customer value wasn't high enough to make the numbers work. This calculator tells you that upfront.

It also gives you projected results — estimated leads, customers, and return — based on conservative, realistic data. So if the answer is yes, you'll have a clear sense of what to expect when you get started.

If Facebook ads are on your radar for this year, this is a 30-second check that's well worth doing. Find it at trystirling.com/tools/facebook-ads-roi-calculator.