Product-Market Fit Calculator
Run the Sean Ellis 40% test to gauge product-market fit.
PMF SCORE
45%
Product-market fit!
PMF score = "very disappointed" ÷ total respondents. 40% or more is the widely used product-market-fit threshold (the Sean Ellis test).
What is Product-Market Fit?
The Sean Ellis test gauges product-market fit by asking users how they'd feel if they could no longer use your product. If at least 40% say they'd be very disappointed, you likely have product-market fit.
PMF score = very disappointed ÷ total respondents × 100
How to read your result
- 40% or more 'very disappointed' is the widely used PMF threshold.
- Survey activated users who've experienced the core value, not signups.
- 25–40% means you're close — segment to find who loves it most.
- Below 25% suggests the product or audience needs rethinking.
Frequently asked questions
What is the Sean Ellis test?
A survey that asks users how disappointed they'd be without your product. If 40%+ answer 'very disappointed,' it's considered a strong signal of product-market fit.
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