Business

Instant, private, and free

Calculatrice: LTV/CAC.

Utilisez Calculatrice: LTV/CAC pour obtenir un résultat clair et pratique à partir de vos données.

On-device calculationNo signup
01

Set your values

Results update as you type.

LTV: $3,200.00

LTV

$3,200.00
LTV/CAC Ratio: 4.00x

LTV/CAC Ratio

4.00x
CAC Payback: 8.3 months

CAC Payback

8.3 months

FAQs

What is a healthy LTV:CAC ratio?

Many SaaS teams target at least 3:1, but the ideal ratio depends on growth stage, margin profile, and payback constraints.

Cite this calculator

Canonical URL: https://mathify.one/fr/business/ltv-cac

Cite as: Mathify. (2026). Calculatrice: LTV/CAC. https://mathify.one/fr/business/ltv-cac

Use Cases

Evaluate SaaS unit economics

Assess the financial health of your SaaS business by calculating LTV, LTV:CAC ratio, and payback period to inform pricing, marketing spend, and retention strategies.

Example: A startup with $50 ARPU, 70% margin, 4% churn, and $300 CAC can see if their LTV:CAC is above 3.

Compare customer segments

Use the calculator to compare LTV and payback across different customer segments or pricing tiers to identify the most profitable acquisition channels.

Example: Compare enterprise vs. SMB segments by entering different ARPU and churn values.

Frequently Asked Questions

How is LTV calculated in this calculator?
LTV is calculated as (ARPU × gross margin) ÷ monthly churn rate. For example, with $100 ARPU, 80% margin, and 5% churn, LTV = ($100 × 0.80) ÷ 0.05 = $1,600.
What does the LTV:CAC ratio indicate?
The LTV:CAC ratio compares the lifetime value of a customer to the cost of acquiring them. A ratio above 3 is generally considered healthy for SaaS, meaning the customer's value is at least three times the acquisition cost.
How is the CAC payback period calculated?
The CAC payback period is calculated by dividing the customer acquisition cost (CAC) by the monthly gross margin contribution (ARPU × margin). It shows how many months it takes to recover the acquisition cost.

Tips & Common Mistakes

Tips

  • Ensure your churn rate is monthly and consistent with the period used for ARPU to get accurate LTV.
  • Use gross margin (not net) to reflect the true contribution margin available to cover acquisition costs.
  • Regularly recalculate as your churn and pricing change to keep your unit economics up to date.
  • Aim for an LTV:CAC ratio of at least 3:1, but also consider payback period to manage cash flow.

Common Mistakes to Avoid

  • Using annual churn instead of monthly churn, which can understate LTV significantly.
  • Forgetting to multiply ARPU by gross margin, leading to an overestimated LTV.
  • Ignoring the payback period and focusing only on LTV:CAC, which can mask cash flow issues.

Last updated: August 13, 2026