Free marketing calculators

Every one of these runs entirely in your browser. Nothing you type is sent anywhere or saved, which means you can put real client numbers into them without thinking twice.

They exist because the same four questions come up in almost every account I audit: is this campaign actually profitable once margin is accounted for, what is the most we can pay for a customer, how much do we need to spend to hit the target, and why has the cost per click moved. Those are arithmetic questions with exact answers, and guessing at them is how budgets get set badly.

Which calculator answers which question

Start with the ROAS calculator if you already have spend and revenue and want to know whether the account is genuinely profitable. The figure that decides it is not your ROAS but your break-even ROAS, which comes from gross margin: at 40% margin you need 2.5x simply to break even, and at 20% you need 5x. A 4x return is excellent for the first business and a loss for the second, which is why comparing your ROAS against someone else's is meaningless without knowing their margin.

Use the break-even CPA calculator before setting any bid or target. It works backwards from gross profit per order to the most you can pay for a customer, then for a lead, then for a click. Those outputs are ceilings rather than targets: a sustainable target usually sits at 50 to 70% of break-even, leaving room for returns, payment fees and the cost of fulfilling the order.

The ad budget calculator answers the question most businesses get backwards. Rather than picking a budget that sounds affordable and accepting whatever it buys, it starts from the number of leads or sales you need and tells you what that costs at your conversion rate and click price. It also exposes how much leverage sits in the landing page, because doubling conversion rate halves the budget required for the same result.

Reach for the CPM, CPC and CTR calculator when costs move and you need to know why. Those three metrics are linked, so seeing them together separates a more expensive auction from creative that has stopped earning clicks. Rising CPM with steady CTR is competition or seasonality; falling CTR with steady CPM is usually creative fatigue.

Finally, the UTM builder is for attribution. Without tagged links, traffic from WhatsApp, email and an Instagram bio lands in GA4 as direct, and the channel that produced the sale gets no credit. Keep everything lowercase, keep the vocabulary consistent, and never tag internal links between your own pages, which restarts the session and destroys the original source.

A note on what these cannot tell you

Each calculator answers an arithmetic question exactly. None of them tells you whether your conversion tracking is honest, and that is the assumption underneath every output here. If a form open is being counted as a lead, or a Pixel is running without server-side events behind it, the inputs are wrong and so is every number that follows. Check the measurement first, then use these.