Calculators that answer one question well.
Free and built for operators. Most need no signup; a few ask for an email because a person or the network does the work. Use them, bookmark them, and send them to whoever runs your ads.
Customer LTV calculator
AOV, order frequency and retention in. What a customer is worth over their whole life out, in revenue and in gross profit.
Open the tool →LTV to CAC ratio calculator
The one number that spans acquisition and retention. Enter cost and lifetime value for the ratio, your headroom per customer, and the payback point.
Open the tool →ROAS calculator
Enter ad spend and revenue to get your ROAS. Add your gross margin to see your breakeven ROAS, the number that decides whether a campaign makes money.
Open the tool →Profit margin calculator
True margin with cost of goods, shipping, payment fees and discounts taken out. Add lifetime orders and it returns profit LTV.
Open the tool →Revenue leak calculator
What the blind spot costs per year, split across conversion, refunds and order value, with every assumption yours to set.
Open the tool →AOV and repeat purchase optimizer
What if the basket went up five dollars? What if ten percent more customers came back? Model both and see which lever moves more for your store.
Open the tool →Cohort visualizer
Upload a Shopify orders export and see repeat purchase behavior by signup month. The file is read in your browser and never uploaded.
Open the tool →Tracking and pixel setup checker
Ten questions across conversion tracking, cost data, email attribution and ad connections. Get a setup score and the gaps worth closing first.
Open the tool →Free analytics audit
Not a calculator. Send your store and current stack, and a person sends back a ten-point audit within two business days.
Open the tool →More calculators planned
If a calculator would save you a spreadsheet, tell us which one and we'll build the most requested next.
Get these numbers for your whole store.
Every calculator here is a one-question slice of what By the Numbers tracks: ROAS by channel, LTV by cohort, and the segments behind both.
60-second install · 14-day free trial · No credit card required