Comprehensive Guide
Learn more in our Business & Tax Guide.
How it works
saas metrics calculator takes your inputs and produces monthly churn rate, customer ltv, ltv/cac ratio. Calculate key SaaS metrics: MRR, ARR, churn rate, and customer acquisition cost. You provide 5 inputs: Monthly Recurring Revenue (currency, in dollars) (default: 50000 dollars); Total Customers (number) (default: 500); New Customers (monthly) (number) (default: 50); Lost Customers (monthly) (number) (default: 25); Customer Acquisition Cost (currency, in dollars) (default: 200 dollars). The calculator returns 3 outputs: Monthly Churn Rate (a secondary output); Customer LTV (a secondary output); LTV/CAC Ratio (the primary result). Business tax and finance calculations combine multiple moving parts — revenue, expenses, depreciation, tax brackets, and timing — in ways that make back-of-envelope estimates unreliable. This calculator handles the interaction of those variables precisely, so your business decisions rest on real arithmetic. With the default values, ltv/cac ratio is computed from the interaction of every input field — change any one of them and the result updates immediately, so you can stress-test different scenarios without re-entering the whole form. Adjust the inputs to match your real financial situation. The defaults are realistic starting points, but every person's circumstances differ — your actual income, expenses, rates, and timelines will produce a different answer. Use the tool iteratively: start with the defaults, then change one variable at a time to see which factor has the largest impact on your outcome.Tips
- Start with the default values to see a baseline result, then change one input at a time to understand which factor matters most for your outcome.
- Replace every default with your actual number — estimates and rules of thumb produce estimates, not answers. Pull your real figures from pay stubs, statements, or account dashboards.
- Run the numbers quarterly, not annually. Tax brackets, revenue, and expenses shift throughout the year, and adjusting early is far cheaper than correcting at year-end.
Frequently asked questions
What are my key SaaS metrics?
$50K MRR = $600K ARR. 500 customers → $100 ARPU. Churn: 5%. LTV: $2,000. CAC: $200. LTV/CAC: 10x (excellent).
How accurate are the calculator results?
The math is exact — the same formulas a financial professional would use by hand. The precision of the output depends entirely on how realistic your inputs are. Use your actual numbers rather than estimates when possible. The defaults are reasonable starting points, but your real income, rates, and timeline will produce a different result.
What should I enter for monthly recurring revenue?
Enter your actual monthly recurring revenue value. The default of 50000 dollars is a common starting point, but replace it with your real figure for an accurate result.