Product-Market Fit (PMF) Score Calculator

Measure your product-market fit using Sean Ellis test, NPS, retention, referrals, and use case coverage. Get a composite score and recommendations.

How essential is your product? (Survey: "How disappointed if couldn't use?")

NPS = % Promoters - % Detractors

Users still active after 30 days

Users who refer others (monthly)

What % of key user needs does your product address?

PMF Score = (Must-Have × 35%) + (NPS × 15%) + (Retention × 25%) + (Referral × 10%) + (Use Cases × 15%)
Must-have: 7.5 (75%), NPS: 45, Retention: 85%, Referral: 15%, Use Cases: 80% = PMF: (75×0.35)+(72.5×0.15)+(85×0.25)+(75×0.1)+(80×0.15) = 26.25+10.88+21.25+7.5+12 = 77.9 = Good PMF!

What is a good PMF score?

Scores: 80-100 = Excellent (product-led growth ready), 60-79 = Good (scalable business), 40-59 = Average (needs improvement), <40 = Poor (reassess product/market). Survey says >40% "very disappointed" = strong PMF.

How do I measure Product-Market Fit?

Primary method: Sean Ellis test ("How disappointed if couldn't use?") - >40% 'very disappointed' = strong PMF. Secondary: NPS >50, retention >85%/month, organic referral rate >10%, expansion revenue >20%. Combine all for composite score.

What if my PMF score is low?

Improvement paths: Deepen core value (better retention), Narrow target market (stronger fit), Expand use cases (address more needs), Improve onboarding (faster time-to-value), Fix critical bugs/churn drivers. Many products find PMF in iteration 2-3.

How often should I measure PMF?

Measure quarterly for early stage, semi-annually for growth stage. Run Sean Ellis survey with at least 100 responses for statistical significance. Track trends - PMF should improve over time. A declining score signals market changes.