About GrowthCalc

Calculators for the metrics marketers and founders actually run on: ROAS, CAC, LTV, payback, conversion rate, churn and more. Each one takes the numbers you already have and returns a single answer plus a one-line read on what it means, so you can make the call without opening a spreadsheet.

Every calculator uses the standard, widely-accepted formula for its metric, and that formula is shown on the page next to the result. The math runs entirely in your browser, so the answer updates the moment you change a number. Nothing is hidden behind a sign-up, and there is nothing to install.

Some calculators flag a result as healthy or worth watching against a common rule of thumb, like aiming for an LTV to CAC ratio of 3 to 1 or a ROAS above 3.0x. These are conventions, not laws. The right target depends on your margins, your model and your stage, so treat the badge as a starting point and judge the number against your own economics.

The spend, revenue and other figures you type are never sent to us or stored anywhere. Because everything is calculated locally, there is no account, no history and nothing for us to hold on to.

If a result looks wrong or a calculator does not behave as you expect, we would rather know. Tell us through the contact form and we will look into it. Getting the numbers right is the whole point.