Churn Rate Calculator
Monthly and annual churn plus retention.
Enter your values
Enter the customers at start you are working with.
Enter the customers lost you are working with.
Enter the mrr at start in $.
Enter the mrr lost in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Monthly churn
- 4.5%
- Annual churn
- 42.5%
- Revenue churn
- 4.29%
- Average lifetime
- 22.2 months
Quick answer
Churn rate is the share of customers lost in a period relative to those you started with.
Churn = lost ÷ starting customers × 100
At a glance
| What it does | Monthly and annual churn plus retention. |
|---|---|
| Category | Business |
| Inputs needed | Customers at start, Customers lost, MRR at start, MRR lost |
| Main output | Monthly churn |
| Formula | Churn = lost ÷ starting customers × 100 |
| Cost | Free — no sign-up, no download |
How to use the Churn Rate Calculator
- 1Enter customers at the start of the month.
- 2Enter how many cancelled.
- 3Add MRR figures for revenue churn.
Inputs explained
- Customers at start
- Enter the customers at start you are working with.
- Customers lost
- Enter the customers lost you are working with.
- MRR at start($)
- Enter the mrr at start in $.
- MRR lost($)
- Enter the mrr lost in $.
Worked example
Using the values the calculator loads with:
Inputs
- Customers at start1400
- Customers lost63
- MRR at start42000 $
- MRR lost1800 $
Results
- Monthly churn4.5%
- Annual churn42.5%
- Revenue churn4.29%
- Average lifetime22.2 months
Frequently asked questions
What is good SaaS churn?
Under 1% monthly for enterprise, under 5% for SMB.
Why track revenue churn?
Losing one big account can matter more than ten small ones.
What do I need to enter into the Churn Rate Calculator?
Just 4 values: customers at start, customers lost, mrr at start, mrr lost. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Churn Rate Calculator work out the answer?
Churn rate is the share of customers lost in a period relative to those you started with. It applies the formula Churn = lost ÷ starting customers × 100 and shows the working so you can check each step by hand.
Is the Churn Rate Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.