TenorOpsBusiness, Pricing & Revenue Calculators · Retention KPI
Free Churn Percentage Calculator | Customer Retention & Lost Revenue
Calculate your customer churn rate percentage, net customers lost, retention rate, and monthly revenue impact.
Enter Values
Customer Churn Inputs
Your Results
Churn & Retention
Step-by-step guide
How to Use the Churn Rate Calculator
- 1Enter Starting Customers
Provide the number of active customers at the start of the period.
- 2Enter New Customers Acquired
Input how many new customers joined during the period.
- 3Enter Ending Customers
Input how many active customers remained at the end of the period to see Churn Rate % and Customers Churned.
Formula & methodology
How Customer Churn Rate Is Calculated
Customers Churned = (Starting Customers + New Customers Acquired) − Ending Customers Churn Rate (%) = (Customers Churned ÷ Starting Customers) × 100
Worked Example: Starting with 1,000 customers, acquiring 200 new ones, and ending the period with 1,150 means 50 customers churned: 50 ÷ 1,000 × 100 = 5.00% churn rate.
Common questions
Frequently Asked Questions
Why are new customers added before subtracting ending customers?
Because ending customer count includes the new customers you acquired during the period. Subtracting ending count from (Starting + New) isolates how many existing customers left.
What is a good monthly customer churn rate?
For recurring service contracts (lawn care, janitorial, pest control, meal subscriptions), a monthly churn rate under 3%–5% is considered strong.
Can this formula also measure employee turnover?
Yes! You can also use our dedicated Employee Turnover Rate & Replacement Cost Calculator to include recruiting and training replacement costs.
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