SaaS Churn Calculator

How to use

1. Enter starting customers, new customers, and churned customers for the month.
2. (Optional) Add starting MRR, new MRR, and churned MRR to see revenue churn and simple NRR.
3. See results update live below the form. Click the button to generate a shareable image.

What the results mean

• Monthly churn – % of customers lost this month (lost / start).
• Retention – % of customers retained this month (1 − churn).
• Annualized churn (approx.) – churn projected over 12 months (1 − (1 − monthlyChurn)^12).
• Net growth rate – overall customer growth ((end − start) / start).
• Gross revenue churn – % of MRR lost from downgrades/cancellations (churnedMRR / startingMRR).
• Simple NRR – quick view of revenue retention (endMRR / startingMRR) — ignores expansion/contraction breakdowns.

Churn quality scale

• 0–1% — 🚀 World-class retention
• >1–3% — 🟢 Healthy
• >3–5% — 🟡 Needs attention
• >5–8% — 🟠 High risk
• >8% — 🔴 Critical

Tips to reduce churn

• Tighten onboarding: one clear “aha” path and lifecycle emails.
• Proactive support: catch at-risk users before they leave.
• Improve product fit: remove friction that blocks activation.
• Price fairly: align tiers with value; avoid confusion.
• Communicate value: regular product updates and usage nudges.

Why founders use this churn calculator

• Fast, no-login calculator built for B2B SaaS.
• Clear formulas and definitions.
• Optional revenue view for MRR churn and NRR.
• Works on mobile. Copy results with one click.

FAQ

• What is a good churn rate for B2B SaaS?
  Lower than 3% monthly is generally healthy. <1% is excellent for established products.
• Should I look at customer churn or revenue churn?
  Both. Customer churn shows user loss; revenue churn shows $$ impact. High-ticket SaaS should track revenue churn closely.
• Why is annualized churn “approximate”?
  It compounds the current month’s churn over 12 months. Real churn moves over time—use it as a directional estimate.
• What’s the difference between gross and net revenue churn?
  Gross counts only lost MRR. Net subtracts losses but adds expansion—so strong upsell can offset churn.
• How often should I calculate churn?
  Monthly is standard. Track weekly activation/retention as leading indicators.
• Do you store my data?
  No. Calculations run in your browser.