SaaS
MRR Calculator
Calculate normalized monthly recurring revenue from customers and average monthly revenue.
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Recurring Revenue and Retention Calculators
Reconcile recurring revenue scale, churn, expansion, retention, and the growth-profitability balance.
Reviewed 2026-06-18 · CalcPilot Editorial Team
Decision brief
How these metrics work together
Recurring-revenue metrics are reliable only when contracts, discounts, usage, currency, reactivations, and one-time revenue follow a written policy. Reconcile the opening base to the closing base before interpreting growth.
Interactive tools
Calculators in this decision system
SaaS
ARR Calculator
Annualize monthly recurring revenue for a subscription business.
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Average Revenue Per User Calculator
Calculate recurring revenue per active customer or account for a consistent period.
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SaaS Churn Rate Calculator
Calculate the percentage of starting SaaS customers lost during a period.
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Gross Revenue Retention Calculator
Calculate recurring revenue retained before expansion from an opening customer cohort.
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Net Revenue Retention Calculator
Calculate recurring revenue retained after expansion, contraction, and churn.
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SaaS Quick Ratio Calculator
Compare new and expansion MRR with contraction and churned MRR.
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SaaS Rule of 40 Calculator
Combine recurring-revenue growth and profit margin into the SaaS Rule of 40 score.
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Revenue Growth Calculator
Calculate the percentage change in revenue between two comparable periods.
Calculate nowNormalize the recurring base
MRR converts active recurring contracts to a monthly amount. ARR is normally twelve times MRR. Exclude setup, hardware, and other one-time revenue unless the metric policy explicitly defines a separate recurring treatment.
Document discounts, pauses, usage revenue, foreign currency, and contract changes. A metric can move because the policy changed even when customer economics did not.
Reconcile every movement
Opening MRR plus new, expansion, and reactivation MRR minus contraction and churn should equal closing MRR. This bridge catches classification errors and turns the top-line metric into an operating model.
Customer churn and revenue churn answer different questions. Losing a few large accounts can produce modest logo churn and severe revenue churn, while strong expansion can lift NRR above 100% despite customer losses.
Judge the quality of growth
High growth with weak retention requires continual replacement and usually higher acquisition spend. Review cohort retention, gross margin, payback, and cash burn alongside MRR growth.
The Rule of 40 frames growth and a chosen profit margin, but its components and stage matter. Use it as a comparison lens, not a substitute for the revenue bridge and cash plan.
Deep dives
Editorial guides for this topic
SaaS Metrics Guide: MRR, ARR, Churn, NRR, and Rule of 40
Understand the core SaaS metrics, how they connect, and the definition choices that make recurring-revenue reporting reliable.
Read the guide →Customer Acquisition Cost: A Practical CAC Measurement Guide
Build a consistent CAC calculation, understand blended and channel CAC, and connect acquisition cost to lifetime value and payback.
Read the guide →Common questions
Frequently asked questions
Is ARR always MRR multiplied by twelve?
That is the common run-rate definition, but the MRR policy must first normalize contracts consistently and exclude non-recurring revenue.
What revenue belongs in NRR?
Use recurring revenue from the opening customer cohort, plus expansion and minus contraction and churn. Exclude revenue from newly acquired customers.
Why track both customer churn and revenue churn?
Customer churn measures lost accounts; revenue churn measures lost recurring value. Account sizes differ, so the two can tell very different stories.
Does strong growth offset weak retention?
Only temporarily in many models. Weak retention raises replacement cost and limits compounding. Compare growth with cohort retention, margin, acquisition payback, and cash.
Editorial scope: This page connects related formulas; it does not replace professional financial, tax, legal, or accounting advice. Review our calculation methodology and editorial standards.