Tools every ecom operator should have bookmarked.
Six calculators. Every formula cited from an authoritative source. The math is shown. No email required.
Profitability
POAS calculator
Profit on Ad Spend. The number Smart Bidding should compound, not gross ROAS.
Open the calculatorBreak-even ROAS calculator
The minimum ROAS that keeps you out of losing money on the ad. Set tROAS targets above this.
Open the calculatorCAC payback calculator
How many months until a customer's gross profit covers the cost to acquire them.
Open the calculatorCustomer LTV calculator
What a customer is worth in gross profit over their full relationship with the brand.
Open the calculatorEfficiency
Attribution
Forecasting
A/B test sample size calculator
Per-variant sample size needed to detect a given lift at 95% confidence and 80% power.
Open the calculatorA/B test significance calculator
Two-proportion z-test. Tells you whether a lift is real or noise.
Open the calculatorCAC ceiling calculator
Maximum CAC you can sustain at your unit economics, given a target LTV-to-CAC ratio.
Open the calculatorWant these run on your account, not from a calculator?
Free 15-minute audit. We screen-share your Google Ads + GA4 + Shopify, walk every number above against your real data, and leave you the audit doc whether you become a client or not.
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