SaaS Metrics Calculator

Compute MRR, ARR, churn, NRR, LTV, CAC and payback in one place.

Customers (this month)

Starting customers

New customers

Churned customers

ARPU ($/mo)

MRR movements ($)

Starting MRR

New MRR

Expansion MRR

Contraction MRR

Churned MRR

Unit economics inputs

Marketing spend ($)

Sales spend ($)

Gross margin (%)

Headline metrics

Ending MRR

$24,100

ARR

$289,200

Net new MRR

$4,100

Ending customers

232

Retention

Customer churn

4.0%

Gross rev churn

5.5%

Net rev churn

-0.5%

NRR

100.5%

GRR

94.5%

Quick ratio

4.73

Unit economics

CAC

$300

LTV

$1,980

LTV : CAC

6.60x

Payback (months)

3.8

Verdict

NRR: Healthy — you grow even without new logos.
LTV : CAC: Strong unit economics.
Payback: Top-quartile SaaS payback (< 12 mo).
Quick ratio: Adding revenue 4x faster than losing it.

About this tool

Enter your monthly customer movements and MRR breakdown (new, expansion, contraction, churn) along with marketing/sales spend, and instantly see all the core SaaS metrics: MRR, ARR, churn, GRR, NRR, quick ratio, LTV, CAC, LTV:CAC and payback period — with a plain-English verdict on each.