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Churn Rate Calculator — Customer, Gross MRR, Net MRR

Free churn-rate calculator. Three flavours: customer churn, gross MRR churn, and net MRR churn (with expansion offset). Net < 0% is the holy-grail "negative churn".

Churn Rate Calculator (Customer + MRR)

Customer churn

3.00%

Gross MRR churn

3.50%

Net MRR churn

2.30%

For SMB SaaS, monthly churn <5% is good, <2% is excellent. Net MRR churn < 0% = "negative churn" = expansion revenue from existing customers beats cancellations. The best SaaS metric in the world.

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About this tool

Calculate customer, gross MRR and net MRR churn

Enter your starting customers or MRR, what you lost, and any expansion revenue to get the three churn rates SaaS teams actually track — customer churn, gross MRR churn and net MRR churn — plus the retention figures that mirror them.

The formulas

  • Customer churn = customers lost ÷ customers at the start.
  • Gross MRR churn = (MRR lost to cancellations + downgrades) ÷ starting MRR.
  • Net MRR churn = (MRR lost − expansion MRR) ÷ starting MRR. When expansion outweighs losses this goes negative — "negative churn," the holy grail.

Why net churn matters most

Gross churn shows how much you're leaking; net churn shows whether your existing base grows on its own. A business with negative net churn compounds revenue even if it stops adding new customers. Everything is computed in your browser.

How to use the Churn Rate Calculator (Customer + MRR)

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the Churn Rate Calculator (Customer + MRR) above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the Churn Rate Calculator (Customer + MRR).

Is the Churn Rate Calculator (Customer + MRR) free to use?

Yes. The Churn Rate Calculator (Customer + MRR) on 7BusyBoss is completely free — no signup, no paywall, no usage cap.

Do I need to sign up to use the Churn Rate Calculator (Customer + MRR)?

No. The Churn Rate Calculator (Customer + MRR) works instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the Churn Rate Calculator (Customer + MRR) work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the Churn Rate Calculator (Customer + MRR)?

Yes. The Churn Rate Calculator (Customer + MRR) runs entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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