How it works
What this calculadora actually does
Most Business tools bury the calculation. Churn Rate calculadora shows it. Punch in your figures, read the working, share the URL if you need a second opinion.
Boards want one number on the slide; this gets you there before the meeting. Have MRR or headcount numbers in a single place — then model the numbers and the rest of this page explains what the answer means.
Work out monthly and annualised customer churn and revenue churn, plus the implied average customer lifetime.
Following the method end to end
Here's what happens when you plug real numbers in.
Work out monthly and annualised customer churn and revenue churn, plus the implied average customer lifetime.
Moments this tool earns its keep
Churn Rate calculadora is aimed at people arriving with questions like these:
- "Churn rate formula"
- "Revenue churn vs customer churn"
- "Negative churn"
- "What is churn rate"
- "How to calculate churn rate"
- "Churn rate example"
Where the number stops being useful
Every tool has an edge where it stops being the right answer. Churn Rate calculadora is no exception:
- For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
- For very large or very small extremes the rounding error outgrows the useful precision.
- When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
- When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.
Mistakes we see over and over
Every time you model the numbers for a new scenario, one of these creeps in — it's worth knowing them ahead of time.
- Assuming the UK and US versions of the same unit are interchangeable — they're not.
- Typing a comma where the tool expects a dot (or vice versa).
- Rounding early — particularly painful in percentages and compound growth.
- Ignoring the time window: a 'per year' answer makes no sense with a monthly input.
- Treating the answer as private: screenshots are fine, but the URL always reruns cleanly.
The sources behind the numbers
Where the maths needs an external authority, we cross-check against:
- Bessemer Venture Partners
- ProfitWell
Works well alongside
If this question keeps coming up for you, the same cluster of tools usually comes next:
- SaaS MRR calculadora — Work out Monthly Recurring Revenue — new, expansion, contraction and churned — plus net new MRR and MRR growth rate.
- Customer LTV calculadora — Estimate customer lifetime value from ARPU, gross margin and monthly churn — and benchmark against CAC.
- Customer Acquisition Cost (CAC) calculadora — Work out blended and paid CAC from marketing spend and new customers, with CAC-to-LTV ratio interpretation.
- SaaS ARR calculadora — Turn MRR into ARR (× 12) and project end-of-year ARR with expansion minus churn — the metric VC boards care about.
How we keep this accurate
Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.
Found an out-of-date number on Churn Rate calculadora or anywhere else in the Business toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.