Calculate customer churn rate by dividing customers lost by total customers. Monitor retention health for your subscription business. Numbers never leave your device — every calculation runs locally in your browser.
Calculate Annual Recurring Revenue from subscription revenue, expansion revenue, and churn. Essential for SaaS businesses tracking growth. Numbers never leave your device — every calculation runs locally in your browser.
Calculate Monthly Recurring Revenue from customer count and average revenue per account (ARPA), with monthly, annual, and ARPU readouts. Example: 120 customers at $49 ARPA = $5,880 MRR. Numbers never leave your device — every calculation runs locally in your browser.
Calculate revenue growth rate by comparing current period revenue to previous period. Track your business growth over time. Numbers never leave your device — every calculation runs locally in your browser.
Calculate monthly mortgage payments with amortization schedule. Enter loan amount, interest rate, and term to see total interest paid. Figures never leave your device — every calculation runs locally in your browser.
Calculate monthly car loan payments, total interest, and total cost. Enter loan amount, rate, and term for a complete auto financing picture. Figures never leave your device — every calculation runs locally in your browser.
This tool does logo churn only: customers lost ÷ total customers (defaults 50/1,000 = 5.00% monthly). It also shows retention, 12-month-compounded annualized churn (~46.0% at defaults), average lifetime in months (1 ÷ monthly churn = 20.0 months), and retained count with CSV export. Revenue churn and NRR need revenue inputs this tool lacks.
NRR = (start MRR + expansion − churn − contraction) ÷ start MRR. Example: ($100k + $15k − $8k − $2k) ÷ $100k = 105% — growing without adding a single customer. Best-in-class SaaS runs 110–130%.
SMB SaaS: 3–7% monthly logo churn is typical; enterprise: under 1–2%. Anything above 10% monthly means the bucket leaks faster than sales can fill it — fix onboarding before spending on acquisition.
Average churn blends January signups (settled) with March signups (still onboarding). Cohort curves show whether each signup month retains better than the last — the only view that proves product improvements work.
No. All churn math runs locally in your browser. No customer counts or revenue figures leave your device.
Last updated October 2026