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MRR / ARR Forecast Calculator
Project 12 months of MRR and ARR from current revenue, gross-new MRR, churn, and expansion. The single most-used founder model.
Free · no signup required · runs entirely in your browser
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Net MRR change per month = gross new MRR + (expansion % − churn %) × prior MRR. Forecasts assume the inputs hold constant; pressure-test by halving gross new and doubling churn to model a bad quarter.
End-of-horizon MRR$135,211
End-of-horizon ARR (mo 12)$1,622,536
Compounded growth / month8.64%
Total growth (12 mo)170.4%
Verdict
Fast
8-15%/month doubles ARR roughly every 6-9 months. Sustainable only with disciplined hiring; this is where most VC-track companies aim.