SaaS MRR Calculator

Calculate MRR, ARR, net growth, and months to target. Factor in churn and new customer acquisition.

Last updated: June 1, 2026

Number of Customers

Avg Revenue/Customer ($)

Monthly Churn (%)

New Customers/Month

Target MRR ($)

MRR

$5,000

ARR

$60,000

Net MRR Growth

$250

5.0% monthly

Months to Target

120+

What is SaaS MRR Calculator?

A SaaS MRR (Monthly Recurring Revenue) calculator tracks the key financial metric for subscription businesses. MRR is the predictable revenue your business generates each month from active subscriptions. This tool calculates MRR, ARR (Annual Recurring Revenue = MRR × 12), net MRR growth (accounting for new customers, expansions, contractions, and churn), and projects future MRR based on current growth rates. For SaaS businesses, MRR growth rate is often more important than absolute revenue because it predicts future scale.

How It Works

Enter your current number of customers and average revenue per user (ARPU) to calculate base MRR. Then input monthly new customers, expansion revenue, and churn rate to see net MRR movement. The tool calculates: Net New MRR = New MRR + Expansion MRR - Churn MRR - Contraction MRR. It projects future MRR at current growth rates and shows how many months until you reach target MRR milestones. The quick ratio (new + expansion) / (churn + contraction) indicates growth efficiency — above 4 is excellent.

Common Use Cases

•Tracking monthly SaaS business health through MRR and growth rate trends
•Forecasting future revenue for financial planning, hiring, and fundraising
•Understanding the impact of churn rate on long-term revenue trajectory
•Calculating the MRR milestone timeline for board reporting and investor updates
•Modeling the revenue impact of pricing changes or new plan tier introductions
•Evaluating the quick ratio to determine if growth is sustainable or churn-driven decay