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Churn rate calculator SaaS teams trust. How much are you leaking?

A free churn rate calculator SaaS teams use to work out the percentage of customers or revenue they lose over a period. The metric that quietly decides whether your growth compounds or leaks away.

The calculator

Churn rate calculator, live.

Churn rate
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This calculator runs entirely in your browser. Nothing you enter is sent anywhere or stored. It is a quick estimate, not financial advice.

Why it matters

Reading your churn rate right.

Churn is the quietest killer in SaaS, because it works against you every single period while you are busy chasing new business. A high churn rate caps your growth no matter how good your acquisition is, since you are refilling a leaking bucket. This calculator gives you the rate from customers or revenue lost over a period; the interpretation tells you how urgent the leak is.

Measure both logo churn and revenue churn, because they tell different stories. You can lose small customers while keeping big ones, so logo churn looks bad while revenue churn looks fine or the reverse. And always pair churn with its mirror image, net revenue retention, because expansion from existing customers can offset churn entirely and turn a leaking bucket into a growing one.

How to use it

How this churn rate calculator SaaS tool works.

01

Pick customers or revenue

Decide whether you are measuring logo churn (customer count) or revenue churn (MRR). Measure both over time, they tell different stories.

02

Use a consistent period

Monthly is standard for SaaS churn. Be consistent so you can track the trend and annualise carefully if comparing to annual figures.

03

Read churn against retention

Pair the churn rate with net revenue retention. Expansion revenue can offset churn, so the two together give the real picture.

Churn rate = (Lost during period / Total at start of period) x 100
Total at start: customers or MRR at the start of the period.
Lost during period: customers or MRR churned in that period.
Use customers for logo churn or MRR for revenue churn. Both matter.
Common questions

What people ask about the churn rate calculator SaaS.

What is a churn rate calculator?+

A churn rate calculator works out the percentage of customers or revenue you lose over a period by dividing the number lost by the total at the start. It is one of the most important SaaS health checks, because churn works against your growth every period. A churn rate is best read alongside net revenue retention, since expansion revenue from remaining customers can offset the losses and change the overall picture entirely.

How do you calculate churn rate for SaaS?+

Divide the number of customers or the amount of MRR you lost during a period by the total you had at the start of that period, then multiply by 100. For customer or logo churn, count customers. For revenue churn, use MRR. Most SaaS measure churn monthly. Measuring both logo and revenue churn matters, because losing many small customers affects the business differently from losing a few large ones.

What is a good churn rate for SaaS?+

It varies by segment but as a rough guide under 1% monthly is excellent, 1 to 3% is typical for SMB and mid-market SaaS and above 5% monthly is severe, because at that rate you lose nearly half your base in a year. Enterprise SaaS generally has much lower churn than SMB, where customers are smaller and more price-sensitive. The right benchmark depends heavily on who you sell to.

What is the difference between logo churn and revenue churn?+

Logo churn measures the percentage of customers you lose, while revenue churn measures the percentage of MRR you lose. They can diverge sharply: losing many small accounts produces high logo churn but low revenue churn, while losing one large account does the reverse. Tracking both gives a fuller picture, because a SaaS can look healthy on one measure while leaking badly on the other. Revenue churn usually matters more financially.

How is churn related to net revenue retention?+

They are two sides of the same coin. Churn measures what you lose, while net revenue retention measures what happens to your existing customer base overall, after both churn and expansion. A SaaS with 3% monthly churn but strong expansion revenue can still have net revenue retention above 100%, meaning the existing base grows even without new customers. Watching churn alone misses the offsetting power of expansion, so always read them together.

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