SaaS Metrics Calculator

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Calculate MRR, ARR, customer LTV and average lifetime from your customer count, ARPU and monthly churn rate. Free dashboard math for SaaS founders.

$
Average monthly revenue per user.
%
Share of customers lost each month.
/mo
Monthly recurring revenue –
Annual recurring revenue –
Customer LTV –
Avg customer lifetime –
Net new customers / month –
MRR = customers × ARPU. LTV = ARPU ÷ monthly churn. Average lifetime = 1 ÷ monthly churn. Set churn above zero to see LTV.

About SaaS Metrics Calculator

The SaaS metrics calculator turns three inputs — customer count, ARPU (average monthly revenue per user) and monthly churn rate — into the dashboard numbers every subscription business tracks: MRR, ARR, customer lifetime value and average customer lifetime. Add your new customers per month to see net new growth after churn.

The formulas are the standard ones investors expect: MRR = customers × ARPU, ARR = MRR × 12, LTV = ARPU ÷ monthly churn and average lifetime = 1 ÷ monthly churn. The calculator also comments on your churn: under 2% per month is excellent, while above 5% is high and erodes LTV quickly.

It is a free sanity-check for founders preparing a pitch, pricing a plan change or stress-testing what a churn improvement would do to lifetime value — no spreadsheet required, and nothing you type leaves your browser.

How to use SaaS Metrics Calculator

  1. Enter your number of customers.
  2. Enter the ARPU — average monthly revenue per user.
  3. Set the monthly churn rate (must be above zero to compute LTV and lifetime).
  4. Optionally add new customers per month to see net new growth.
  5. Read the MRR, ARR, customer LTV, average lifetime and net new customers.

Frequently asked questions

LTV = ARPU ÷ monthly churn rate. With $50 ARPU and 2.5% monthly churn, LTV is $2,000. The same churn figure also gives the average lifetime: 1 ÷ 0.025 = 40 months.

Under 2% per month is excellent and typical of sticky products; 3–5% is common for SMB-focused tools; above 5% is high — at that level LTV and average lifetime shrink very quickly.

MRR is your monthly recurring revenue — customers times ARPU. ARR simply annualizes it (MRR × 12) and is the headline figure used in fundraising and valuation conversations.

It is monthly signups minus monthly churned customers. If you add 100 customers but churn removes 60, net new growth is 40 — the number that actually moves MRR upward.

LTV and average lifetime divide by the churn rate, so zero churn implies an infinite customer lifetime. Enter your real monthly churn, even if small, to get meaningful figures.
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