MRR & ARR Calculator
Turn customers and average revenue into recurring revenue. Enter your customer count and monthly ARPA to get MRR and ARR instantly — the two numbers every SaaS conversation runs on.
Customer Acquisition Cost (CAC)
How much you spend, on average, to win one new customer.
Customer Lifetime Value (LTV)
The total gross profit you earn from an average customer before they churn.
LTV : CAC Ratio
The single most-watched SaaS efficiency number. 3:1 is the healthy benchmark.
MRR & ARR
Monthly and annual recurring revenue from your customer base.
Churn Rate
The percentage of customers you lose in a period — and the lifetime it implies.
Customer Retention Rate
The percentage of customers you kept, excluding new ones you added.
SaaS Valuation
A revenue-multiple estimate. Faster growth earns a higher multiple.
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What Is Monthly Recurring Revenue (MRR)?
Monthly recurring revenue is the predictable subscription revenue a SaaS business earns every month. It is the metric that makes recurring-revenue companies valuable: unlike one-time sales, MRR carries forward, so each month starts from the base the last one built. Track MRR and you are tracking the health of the business itself — how fast it is growing, and whether that growth is real or leaking out through churn.
MRR only counts revenue that repeats. Setup fees, one-time charges, and unpredictable usage overages are excluded on purpose, because the whole point of MRR is to measure the stable, recurring base you can forecast and build on.
How to Calculate MRR and ARR
The MRR formula is simple: multiply your number of active customers by your average revenue per account (ARPA). Annual recurring revenue (ARR) is just that number times twelve.
250 customers at $50/month ARPA gives $12,500 MRR and $150,000 ARR. Simple — but only if you normalise annual plans to monthly (divide a yearly contract by 12) and exclude one-off fees.
The Four Components of MRR
Total MRR is a net of four moving parts. Tracking them separately shows whether growth is healthy or just masking churn:
| Component | What it is |
|---|---|
| New MRR | Revenue from new customers won this period |
| Expansion MRR | Upgrades and upsells from existing customers |
| Contraction MRR | Downgrades from existing customers |
| Churned MRR | Revenue lost to cancellations |
Net new MRR = New + Expansion − Contraction − Churned. When expansion alone outpaces contraction and churn, you have net negative revenue churn — the strongest growth signal in SaaS.
MRR vs ARR: What's the Difference?
MRR and ARR measure the same recurring revenue over different windows. MRR is the monthly run-rate you watch for momentum; ARR is that figure annualised for the conversations that happen in yearly terms. Founders manage the business on MRR and net new MRR month to month, then report ARR to investors, because valuation and funding rounds are almost always framed in annual recurring revenue.
What Is a Good MRR Growth Rate?
There is no single benchmark, but context helps. Early-stage SaaS chasing venture scale often targets double-digit month-over-month MRR growth; a bootstrapped, profitable subscription business might be delighted with steady single-digit growth and low churn. What matters more than the headline number is net new MRR: growth that survives after churn and contraction are subtracted. A company adding lots of new MRR while bleeding churned MRR is running to stand still.
How to Increase MRR
Three levers grow MRR, and they map to the components above:
- Add new customers. More paying customers at the same ARPA lifts New MRR directly.
- Grow expansion MRR. Upsells, higher tiers, and seat expansion raise ARPA on customers you already have — the cheapest MRR you can add.
- Cut churned MRR. Every dollar you stop losing to cancellations flows straight to the bottom of the net-new equation. Retention is usually the highest-leverage lever.
Why ARR Drives Valuation
Investors value SaaS on ARR because it's predictable and compounding. A company at $150k ARR growing 80% year over year is worth far more than a static one at the same ARR. See what a multiple looks like in the SaaS valuation calculator, pair MRR growth with low churn to keep the run-rate climbing, and tie every metric together in the SaaS metrics hub.
Common MRR Mistakes to Avoid
The most common MRR calculation errors all inflate the number: booking an annual contract as a single month of MRR instead of dividing it across twelve, counting one-time setup or onboarding fees as recurring, and including usage overages that won't repeat. Keep MRR to genuinely recurring, normalised subscription revenue and the figure stays honest — and comparable month to month.
Built and tested by Alston Antony — 500+ SaaS tools reviewed, 15,000-member founder community. Free, private founder math.
Frequently Asked Questions
How do you calculate MRR?
The simplest MRR calculation is customers × average revenue per account per month (ARPA). If you have 250 customers paying an average of $50/month, MRR = $12,500. For a fuller picture, MRR also breaks into new, expansion, contraction, and churned MRR — but customers × ARPA is the right starting number.
How do you calculate ARR from MRR?
ARR = MRR × 12. Annual recurring revenue is just monthly recurring revenue annualised. $12,500 MRR is $150,000 ARR. Investors typically value SaaS on ARR, so most funding and valuation conversations happen in ARR terms.
What is the difference between MRR and ARR?
They measure the same recurring revenue over different windows. MRR is the monthly run-rate; ARR is that figure annualised (MRR × 12). Use MRR to track month-to-month momentum and net new MRR; use ARR for valuation, board decks, and funding conversations, where the annual number is the convention.
Should annual plans be counted in MRR?
Yes, normalised to a monthly figure. Divide an annual contract by 12 and add it to MRR. Do not book the whole annual payment as one month of MRR — that spikes the number artificially. The goal of MRR is a smooth, comparable monthly run-rate.
What is the difference between MRR and revenue?
MRR counts only recurring subscription revenue, normalised monthly. It excludes one-time fees, setup charges, and usage overages that do not repeat predictably. That is the point — MRR measures the predictable, recurring base that makes SaaS valuable.
Does this MRR calculator handle upgrades, downgrades, and churn?
The calculator returns your baseline MRR (customers × ARPA) and annualises it to ARR. To track the moving parts, split total MRR into new, expansion, contraction, and churned MRR yourself — net new MRR = new + expansion − contraction − churned. That breakdown is what shows whether growth is healthy or masking churn.
Can I use this for non-SaaS subscriptions?
Yes. Any subscription business — a membership, a newsletter, a service retainer — has monthly recurring revenue. As long as revenue repeats on a predictable schedule, customers × ARPA gives you MRR the same way it does for SaaS.
Is this MRR calculator free?
Yes — free, no signup, no limits. It runs entirely in your browser and stores nothing.