The Eight Numbers That Matter.

Eight numbers tell you almost everything about a SaaS company at a glance: MRR, ARR, growth rate, gross revenue retention, net dollar retention, gross churn, logo churn, and ARPU. This calculator turns five inputs into all eight, with top-quartile benchmarks from public SaaS data. The output is the same set of numbers an investor would compute from your data room, which is also a reasonable thing to know about your own business.

MRR is monthly recurring revenue from active subscriptions. ARR is MRR × 12. Growth rate is the month-over-month percentage change in MRR (annualized when reporting to investors). Gross revenue retention is the percent of starting MRR retained from the same cohort, before any expansion. Net dollar retention includes expansion and is the single most-cited efficiency metric per Bessemer's State of the Cloud. Gross churn is the percentage of starting MRR lost. Logo churn is the percentage of starting accounts lost. ARPU is MRR divided by active accounts.

Top-quartile thresholds for SaaS companies at typical scale, drawn from OpenView SaaS Benchmarks and the KeyBanc SaaS Survey: NDR over 120% (top decile public SaaS), 100%+ is healthy at private scale. Gross churn under 1% per month is enterprise-grade; 1-2% per month is mid-market healthy; over 3% per month signals product fit problems. Growth rate 15-20% MoM at sub-$1M ARR, settling to 8-12% at $1-10M ARR for top-quartile companies.

NDR above 100% means your existing customer base is growing in revenue even before you add a single new customer. NDR over 120% effectively gives you a second growth motor on top of new-logo acquisition: it's why public SaaS companies with high NDR (Snowflake, Datadog, MongoDB) trade at multiples 2-3x their peers per Tomasz Tunguz's analyses. If NDR is red, fix packaging and the expansion motion before optimizing new-logo CAC.

Monthly once you have at least 50 paying accounts. Weekly during fundraising. Pair with the SaaS Metrics Dashboard for color-coded benchmark scoring, the Unit Economics Calculator for the per-customer view, and the Cohort Analysis Tool when month-over-month aggregates start lying about your real retention.