Free tool

Free churn rate calculator

Calculate customer + revenue churn

Enter the start-of-period counts and what changed during the month (or quarter, or year). You'll get customer churn, gross revenue churn, and net revenue churn.

accts
accts
$
$
Revenue lost from customers who cancelled or downgraded.
$
Revenue gained from existing customers expanding.
Net revenue churn
1.08%
Customer churn: 2.40% · Gross rev. churn: 2.83%
Customer churn = customers lost / customers at start
Gross revenue churn = MRR lost / MRR at start
Net revenue churn = (MRR lost − expansion) / MRR at start
Auto-track this on your real Stripe + HubSpot data. atSpark calculates customer, gross, and net churn — broken down by segment, plan, and cohort. Try atSpark
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Customer vs revenue churn — which matters?

Both. Customer churn tells you how many logos you're losing. Revenue churn tells you how much money you're losing. If you lose 10 small customers and gain 2 big ones, customer churn looks bad and revenue churn looks great. The reverse is also possible. Track both.

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What does a 1pt improvement actually mean?

At the inputs above, dropping net churn from 1.08% to 0.08% means roughly ~$2,400/mo of MRR retained — which compounds. Over 12 months that's ~$30k of recovered ARR. Over a 3-year contract life, multiply by retention math.

Cohorts that retain > 100% net (i.e. expansion exceeds churn) are the gold standard. That's why best-in-class SaaS aims for negative net churn — and why expansion revenue is so valuable.

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