SaaS Metrics Calculator
The seven numbers every SaaS founder should know, in one free tool — CAC, LTV, LTV:CAC, MRR/ARR, churn, retention, and valuation. Each returns an instant result and a plain-English benchmark. No signup, nothing stored.
Seven founder calculators in one. Pick a metric, enter your numbers, and get an instant result with a plain-English benchmark. Everything runs in your browser — nothing is stored or sent anywhere.
Customer Acquisition Cost (CAC)
How much you spend, on average, to win one new customer.
Customer Lifetime Value (LTV)
The total gross profit you earn from an average customer before they churn.
LTV : CAC Ratio
The single most-watched SaaS efficiency number. 3:1 is the healthy benchmark.
MRR & ARR
Monthly and annual recurring revenue from your customer base.
Churn Rate
The percentage of customers you lose in a period — and the lifetime it implies.
Customer Retention Rate
The percentage of customers you kept, excluding new ones you added.
SaaS Valuation
A revenue-multiple estimate. Faster growth earns a higher multiple.
🔒 100% client-side. Your numbers never leave this page.
Every calculator, explained in depth
Each metric has its own guide with the formula, worked examples, and benchmarks. Use the tabs above for a quick calc, or open a dedicated page to go deeper.
How These Metrics Fit Together
SaaS metrics aren't a list — they're a chain. Churn sets your average customer lifetime, which drives LTV. LTV measured against CAC tells you whether acquisition is profitable — the 3:1 ratio is the benchmark. Your customer base produces MRR, which annualises to ARR, and ARR times a growth-adjusted multiple gives your valuation.
That chain is why retention is the highest-leverage number in SaaS: cut churn and you lift LTV, LTV:CAC, and valuation simultaneously — without spending a dollar more on acquisition.
Frequently Asked Questions
What SaaS metrics should a founder track?
The core set is CAC (what a customer costs to acquire), LTV (what they are worth), the LTV : CAC ratio (efficiency — aim for 3:1+), MRR and ARR (recurring revenue run-rate), churn and retention (how much leaks), and a valuation multiple. Together they tell you whether the business is healthy and fundable. All seven are in the calculator above.
How do these metrics connect?
They compound. Churn sets average customer lifetime, which drives LTV. LTV compared to CAC tells you if acquisition is profitable. MRR × 12 gives ARR, and ARR × a growth-adjusted multiple gives valuation. Improve churn and you lift LTV, LTV:CAC, and valuation at once — which is why retention is usually the highest-leverage number.
Are these calculators really free with no signup?
Yes. Every calculator here is free, needs no account, and has no usage limit. Everything is computed in your browser with JavaScript — your numbers are never uploaded, stored, or shared.
How accurate are the benchmarks?
The benchmarks (3:1 LTV:CAC, sub-3% monthly churn, growth-based valuation multiples) are widely used SaaS rules of thumb, not guarantees. They vary by segment — enterprise, SMB, and self-serve have different healthy ranges. Use them to sanity-check direction, not as absolute targets.
Who built these calculators?
Alston Antony — an AI SEO strategist and software engineer who has reviewed 500+ SaaS tools and runs a 15,000-member community of lifetime-deal buyers and founders. These exist so founders can run honest napkin math without paying for an analytics seat.