Monthly Recurring Revenue (MRR) is the predictable monthly revenue generated from all active subscriptions. It equals the number of paying customers multiplied by the average revenue per account (ARPA). MRR is the primary health metric for subscription businesses.

Annual Recurring Revenue (ARR) is MRR multiplied by 12. It represents the annualized value of your subscription base, assuming no growth or churn, and is the figure most commonly cited in funding rounds and valuations.

Average Revenue Per Account (ARPA) is total MRR divided by the number of active customers. It tells you how much revenue each customer generates on average per month. Rising ARPA usually indicates successful upselling or pricing power.

How does the growth projection work?

Each month, new customers are added based on the net growth rate you specify (gross new customers minus churned customers, expressed as a percentage of the current base). ARPA is held constant. The table shows cumulative MRR and ARR at each month.

What is a good MRR growth rate?

Early-stage SaaS companies often target 10–20% month-over-month growth. At scale, 5–10% monthly growth is considered strong. Sustainable long-term growth depends heavily on churn: even 15% monthly growth is eroded by high churn rates.

Does this tool store any data?

No data is sent to any server. All calculations run entirely in your browser using JavaScript.

MRR Calculator

Name: MRR Calculator
Availability: InStock
Author: Nham Vu

Enter your customer count and average revenue per account to instantly calculate MRR, ARR, ARPA, and 12-month growth projections.

Revenue Inputs

Active Paying Customers

Avg. Revenue Per Account (ARPA) / month

Currency

Growth Projection (optional)

Monthly Net Customer Growth

Net new customers added each month as % of current base.

Monthly Churn Rate

% of customers lost each month.

Enter customer count and ARPA to see your MRR.

MRR

—

per month

ARR

—

annualized

ARPA

—

per account

Current Snapshot

Active Customers	—
ARPA (monthly)	—
MRR	—
ARR (MRR × 12)	—
Net Monthly Growth Rate	—

12-Month Projection

Month	Customers	MRR	ARR	Growth

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Summary

Enter your customer count and average revenue per account to instantly calculate MRR, ARR, ARPA, and 12-month growth projections.

How it works

Enter the number of active paying customers.
Enter the average revenue per account (ARPA) in your currency.
Optionally set a monthly customer growth rate and churn rate.
Click Calculate to see MRR, ARR, and a 12-month projection table.
Adjust inputs to model different growth scenarios.

Use cases

Tracking MRR as a core SaaS health metric.
Projecting annual recurring revenue for investor decks.
Modeling the impact of churn on long-term revenue.
Comparing revenue scenarios at different growth rates.
Calculating ARPA to benchmark against industry averages.
Planning headcount and burn rate against projected MRR.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu