Startup Calculator — LTV, CAC & Break-even
About the Startup Unit Economics Planner
Model the core unit economics of a startup or online business: customer acquisition cost (CAC), lifetime value (LTV), margins, burn, and runway. Change one assumption and immediately see how the whole model shifts. Unit economics answer the question investors always ask first: do you make more from a customer than it costs to acquire them?
This tool works in your browser: the files and text you use are processed on your device and are not uploaded.
How to use it
- Choose a tab: Unit Economics, Break-even or Valuation Estimator.
- Fill in the inputs for that tab, such as lifetime value and acquisition cost, or fixed costs and unit price.
- Read the ratio, break-even point or estimated valuation that updates as you type.
Frequently asked questions
What is a healthy LTV-to-CAC ratio?
The common benchmark is 3:1 — a customer should generate at least three times what they cost to acquire. Below ~1.5:1 the business loses money as it grows; far above 5:1 may mean you are under-investing in growth.
How do I calculate CAC correctly?
Total sales and marketing spend in a period ÷ new customers acquired in that period. Include salaries, tools, and agency fees, not just ad spend — ad-spend-only CAC flatters the numbers.
What is runway and how much should I keep?
Runway = cash in bank ÷ monthly net burn. Most founders aim to raise or reach break-even with at least 6 months of runway remaining, since fundraising itself typically takes 3–6 months.
This calculator is for informational and educational purposes only and does not constitute financial advice. Verify important figures with your bank, lender, or a qualified financial advisor.