Churn & NRR Calculator

Free churn and net revenue retention calculator for SaaS founders. Enter one period of revenue movement to get NRR, GRR, revenue and logo churn, the SaaS quick ratio, average customer lifetime, and the LTV impact of cutting churn. No signup.

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Run this in your agent

The same method runs as the free AAJ agent skill Lifecycle & Retention, so a coding agent can do this work with your own data. Install it with npx skills add sarojkjha/aaj-marketing-skills --skill lifecycle-and-retention.

How the calculator works

Enter the revenue you started the period with, the expansion, contraction and churned revenue during it, and the customer counts. The calculator returns net and gross revenue retention, revenue and logo churn, the SaaS quick ratio, the average customer lifetime implied by your churn rate, and how much of that lifetime value changes when churn falls. Everything runs in your browser.

Frequently asked questions

What is net revenue retention (NRR)?

NRR is the revenue you keep from your existing customers over a period, after expansion, downgrades, and cancellations — expressed as a percentage of where you started. Above 100% means your installed base grows on its own, before any new logos; below 100% means it shrinks and new sales have to run just to stand still. It's also called net dollar retention (NDR).

NRR vs GRR — what's the difference?

Gross revenue retention (GRR) counts only what you lose — contraction and churn — so it can never exceed 100% and shows how leaky the base is. NRR adds expansion back in, so it can exceed 100% when upsell outweighs churn. GRR tells you how well you hold what you sold; NRR tells you whether the base grows itself. Read them together: high NRR alone can mask heavy churn hidden under a few big expansions.

What's a good NRR, GRR, and quick ratio?

Two published reference points, both annual. SaaS Capital's 2026 survey puts the median at 103% NRR and 91% GRR for bootstrapped private B2B SaaS companies between $3M and $20M ARR. Bessemer's State of the Cloud 2023 sets 100% NRR as good, 110% as better and 120% as best for a typical Series B or C enterprise software company. Retention runs lower for SMB-focused products and higher for enterprise, so read yours against your own segment and your own trend. The quick ratio is dollars added per dollar lost: above 1 you are adding more than you lose. There is no published threshold for it that we can trace to a primary source, so the tool reports the ratio without a verdict.

How does churn affect LTV?

Lifetime value is proportional to one divided by your churn rate, so retention is usually the highest-leverage input to LTV — often more than pricing or acquisition. Halving churn roughly doubles average customer lifetime and LTV. The impact slider in the tool shows this directly: pick a lower churn target and watch lifetime and LTV move. For the full LTV:CAC and payback picture, pair it with the Unit Economics Calculator.

Should I use monthly or annual figures?

Use whichever matches how you bill and review. Monthly is right for month-to-month or usage-based products; annual suits annual-contract businesses and smooths out lumpy movement. Keep every field on the same basis — don't mix a monthly churn number with annual revenue. The tool converts the resulting lifetime into months either way, so the outputs stay comparable.

Does this tool send my numbers anywhere?

No. Everything is calculated in your browser. Your figures aren't sent to a server, saved to an account, or shared — close the tab and they're gone. It's a private way to check sensitive revenue metrics before you take them to a board deck or a fundraise.