LTV:CAC ratio calculator

The health check for growth spend.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18

Monthly revenue per customer

Gross margin

78%

Monthly churn

Cost to acquire

LTV:CAC

2.75:1

Lifetime value

$2,340

With these inputs, LTV:CAC comes to 2.75:1. Lifetime value works out to $2,340.

What moves the number · LTV:CAC

Input	−10%	Now	+10%
Monthly revenue per customer	2.48:1	2.75:1	3.03:1
Gross margin	2.48:1	2.75:1	3.03:1
Monthly churn	3.06:1	2.75:1	2.50:1
Cost to acquire	3.06:1	2.75:1	2.50:1

Whatmakesequal

Save this set of inputs, change something, then save again to compare the outcomes side by side.

The health check for growth spend.

With the defaults above, ltv:cac works out at 2.75:1.