MRR & ARR Calculator

The heartbeat metric of any subscription business. Enter your paying customers and average price to get your MRR and ARR — plus where you'll be in 12 months at your current growth rate.

Need more than the free basics? Calculating MRR once is easy; tracking it live alongside churn, CAC and the rest is the job. A dashboard tool like Databox pulls these metrics together automatically.

Try Databox →

Affiliate link — we may earn a commission if you sign up, at no cost to you. It never changes our honest take.

MRR, ARR and why growth compounds

MRR is your predictable monthly subscription revenue; ARR is simply MRR × 12. The reason SaaS founders obsess over it is compounding: steady monthly growth on a recurring base snowballs — 8% a month is roughly 2.5x in a year. This simple version assumes no churn; in reality, retention is half the battle, so track churn alongside MRR.

Frequently asked questions

What is MRR?

Monthly recurring revenue — the predictable subscription income you earn each month. It's the core metric for any subscription or SaaS business.

What's the difference between MRR and ARR?

ARR (annual recurring revenue) is just MRR multiplied by 12. MRR is the monthly view; ARR the annual one.

Does this account for churn?

No — it's a simple projection assuming you keep customers. Real growth depends on retention too, so track churn alongside MRR in a tool like Databox.

This tool is free and runs entirely in your browser. The link above is an affiliate link: we may earn a commission if you sign up, at no extra cost to you, and it never changes our honest take.