Marketing & Ad Calculators Tools

Free online marketing calculators — an A/B test significance calculator with real p-values, computed entirely in your browser.

5 tools
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CLV Calculator

Work out customer lifetime value three ways, with the LTV to CAC ratio and payback month, and see why zero churn breaks the usual formula.

A/B Significance

Run a two-proportion z-test on your A/B test results and get a real p-value, not just a percentage. Fully client-side, no data ever leaves your device.

CTR Calculator

Calculate click-through rate from clicks and impressions, set a target CTR to see the click gap, and compare against common channel benchmarks. Offline.

CPM Calculator

Solve for CPM, impressions or ad spend from the other two, with a target-CPM gap, cost per impression and common channel benchmarks. No ad-platform login.

UTM Builder

Tag any link with utm_source, utm_medium and campaign parameters, or paste a finished link and read its fields back out. Existing query strings survive.

Why These Tools

A/B Test Significance Calculator exists because a taller bar in a dashboard isn't the same claim as a statistically real difference, and the gap between those two things is exactly what a p-value measures. It runs a proper two-proportion z-test rather than eyeballing percentages, checked against Python's own math library during development so the p-values it reports are trustworthy. UTM builders and cost-per-click, cost-per-acquisition and customer lifetime value calculators are queued to follow.