Free calculators for SaaS metrics, paid ads, and finance

MetricKit helps you start from the decision you are trying to make, then move into the right calculator or guide for CAC, LTV, ROAS, payback, runway, and more.

Choose your task

Start from the business question, not just the metric name. Each hub below is organized around the jobs users usually need to get done first.

Popular calculators

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Popular guides

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Popular definitions

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What you get

  • Clear formulas and assumptions (so results are explainable).
  • No login required.
  • Fast pages and simple navigation.