Does the SaaS metrics calculator store business data?

No. Calculations run locally in the browser and the entered metrics are not sent to a server.

Is the SaaS forecast a financial guarantee?

No. The projection is a simple run-rate estimate that assumes the same net MRR movement repeats for twelve months.

Free browser-based SaaS tool

SaaS Metrics Calculator for MRR, LTV and CAC

Q: What SaaS metrics does this calculator include?

It calculates MRR, ARR, ARPA, net new MRR, MRR growth, net revenue retention, CAC, LTV, CAC payback, LTV to CAC and a simple 12-month run-rate projection.

Enter your recurring revenue, customer movement and acquisition costs. Get clear unit-economics estimates with the formulas and assumptions shown beside the result.

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Transparent formulas

Calculator

See what your SaaS numbers are saying.

Use one consistent monthly reporting period. Blank or zero inputs stay visible as unavailable instead of producing a misleading result.

Monthly inputs

Use the same currency and time window for every value.

Currency

Current subscription base

Current MRRMonthly recurring revenue Paying customersActive paying accounts Gross margin %Used for LTV and payback Monthly customer churn %Logo churn, not revenue churn

This month’s MRR movement

New MRRFrom new customers Expansion MRRUpgrades and add-ons Contraction MRRDowngrades Churned MRRRevenue lost to cancellations

Acquisition

Sales + marketing spendSame reporting period New customersAcquired in that period

Your metric snapshot

Calculated locally from the values on the left.

MRR—Current recurring revenue

ARR—MRR × 12

ARPA—MRR per paying customer

Net new MRR—New + expansion − losses

MRR growth—Net new MRR ÷ current MRR

NRR—Existing-customer revenue retention

CAC—Spend per new customer

Estimated LTV—Gross-margin adjusted estimate

CAC payback—Estimated months to recover CAC

LTV : CAC—Estimated lifetime value multiple

12-month MRR run rate—Same net MRR change repeated

Plain-English readout

Formulas and assumptions

Useful estimates, not pretend precision.

SaaS metrics depend on consistent definitions and clean billing data. This calculator exposes its simplified formulas so you can spot where your own reporting needs a more detailed cohort model.

This tool is for planning and education. It is not accounting, investment or financial advice, and the 12-month figure is not a forecast guarantee.

MRR, ARR and net new MRR

ARR = MRR × 12. Net new MRR adds new and expansion MRR, then subtracts contraction and churned MRR.

Net revenue retention (NRR)

(Starting MRR + expansion − contraction − churn) ÷ starting MRR. New-customer MRR is excluded because NRR measures the existing customer base.

Customer acquisition cost (CAC)

Sales and marketing spend ÷ new customers. Use spend and customers from the same reporting period.

Estimated customer lifetime value (LTV)

ARPA × gross margin ÷ monthly customer churn rate. This simplified estimate assumes churn remains stable and does not model cohorts, expansion or discounting.

CAC payback and 12-month run rate

CAC payback divides CAC by monthly gross-margin revenue per customer. The run-rate projection repeats the same entered net new MRR for 12 months without compounding or seasonality.

What SaaS metrics does this calculator include?

MRR, ARR, ARPA, net new MRR, MRR growth, NRR, CAC, LTV, CAC payback, LTV to CAC and a simple 12-month MRR run rate.

Does this calculator store my business data?

No. The calculation runs locally in your browser and does not send your entered metrics to a server.

Is the 12-month result a financial guarantee?

No. It is a simple planning estimate that repeats the same net MRR change for twelve months.

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