Churn Rate Calculator
Measure the percentage of customers you lose.
Results update as you type.
How it works
A churn rate calculator measures how quickly you are losing customers, which for any subscription or recurring-revenue business is often the single most important number to control. You enter how many customers you had at the start of a period and how many you lost during it, and the tool returns both the churn rate and its complement, the retention rate. Churn matters because acquisition is expensive and slow, so a leaky bucket undermines every dollar spent on growth: if you lose customers as fast as you win them, revenue stalls no matter how good your marketing is. Small differences compound dramatically over time, five percent monthly churn quietly loses nearly half your customers over a year, while trimming it to two percent transforms the trajectory of the business. That is why churn is watched so closely by SaaS companies, subscription boxes, membership sites and any business built on repeat revenue. The retention side of the same coin is what powers compounding growth, because customers you keep buy again, refer others and cost nothing more to acquire. Reading churn over time reveals whether product, onboarding, pricing or support is driving people away, and segmenting it shows which customers leave and why. Founders, growth teams, customer success managers and marketers use a churn rate calculator to track the health of their base, model the revenue impact of retention improvements, set targets for customer success efforts, and prove that reducing churn is usually the highest-leverage growth investment available, cheaper and more durable than simply pouring money into acquiring replacements for the customers slipping out the back door.
Churn rate = (customers lost ÷ customers at start) × 100
Churn rate divides the customers lost during a period by the number you had at its start, expressed as a percentage, and retention is simply the mirror image, one hundred percent minus churn. Using the starting count as the denominator measures attrition against the base you were trying to keep. Because it is a rate, it lets a small startup and a large enterprise compare loss fairly. Even a few points of monthly churn compound viciously over a year, which is why the metric commands so much attention in subscription businesses.
Source:Standard SaaS metric (churn rate)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter customers lost and customers at start.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Churn rate updates instantly as you type — no button to press.
Frequently asked questions
What is churn rate?
Churn rate is the percentage of customers who stop doing business with you over a given period, such as a month or a year. It is the direct opposite of retention rate, and together they describe how well you hold on to the customers you have won. For subscription and recurring-revenue businesses, churn is often the metric that determines whether the company grows or stagnates, because losing customers quietly cancels out the gains from acquiring new ones.
What is a good churn rate?
A good churn rate depends heavily on your business model and customer type. Many established SaaS companies aim for low single-digit monthly churn, while annual churn benchmarks differ by segment, with enterprise customers typically churning far less than consumer or small-business ones. Rather than fixate on a universal number, track your own churn over time and against close competitors, and treat any sustained decline as a meaningful win, since even small improvements compound.
How is churn rate different from retention rate?
They are two sides of the same measurement. Churn rate is the share of customers you lost in a period, while retention rate is the share you kept, so the two add up to one hundred percent. If churn is five percent, retention is ninety-five percent. Teams often lead with whichever framing suits the conversation, emphasising retention when celebrating loyalty and churn when diagnosing problems, but both come from the same underlying numbers.
How can I reduce churn?
Improve onboarding so customers reach value quickly, since early confusion is a leading cause of cancellation. Monitor engagement to spot at-risk customers before they leave and reach out proactively, strengthen support, and close product gaps that drive frustration. Aligning pricing with value, rewarding loyalty, and gathering exit feedback to fix recurring reasons for leaving all help. Because retained customers compound in value, even modest churn reductions can dramatically improve long-term revenue.
Why does churn matter so much?
Churn matters because its effects compound. A business losing a few percent of customers every month must run ever faster on acquisition just to stand still, and high churn caps how large the company can grow regardless of marketing spend. Retained customers, by contrast, buy repeatedly, refer others and require no fresh acquisition cost, so lowering churn lifts lifetime value across the entire base. For recurring-revenue models, controlling churn is often more valuable than accelerating acquisition.