Shopify Store Calculators
Section updated .
A free set of Shopify calculators for the numbers that decide whether a store makes money: true profit per order, break-even ROAS, discounts, lifetime value, landed cost, reorder points, returns, and more. Each runs in your browser, shows its formula, and is built for owner-level decisions — no signup required.
Margin & pricing
Shopify True Profit Per Order Calculator
What each order actually keeps after product, shipping, fees, and ads — net profit and contribution margin.
Open calculator →Break-Even ROAS Calculator
The ROAS floor below which you pay to lose money, plus your target ROAS and max cost per acquisition.
Open calculator →Discount Impact Calculator
The real margin a discount gives away, and the volume lift needed before a promotion pays for itself.
Open calculator →Free Shipping Threshold Calculator
The free-shipping threshold that lifts order value without eating margin, plus the uplift needed to break even.
Open calculator →Customers, marketing & retention
Customer Lifetime Value & LTV:CAC Calculator
Lifetime gross profit per customer, the LTV:CAC ratio, and how many orders it takes to recover acquisition cost.
Open calculator →Subscription Churn & MRR Calculator
Where subscribers and MRR land at your current churn and acquisition — plus lifetime value and the growth ceiling.
Open calculator →Email & SMS Marketing ROI Calculator
What your list is worth in gross profit per send and per subscriber — built from mechanics, not attribution.
Open calculator →Abandoned Cart Recovery Value Calculator
The gross profit a better cart-recovery rate is worth each month, net of flow costs — not the vanity abandoned total.
Open calculator →A/B Test Significance Calculator
Whether an A/B test result is real or noise — p-value, confidence achieved, and the sample size you actually need.
Open calculator →Inventory & operations
Landed Cost Per Unit Calculator
True landed cost per unit — supplier price plus freight, duty, insurance, brokerage, and delivery — and the margin left.
Open calculator →Reorder Point & Safety Stock Calculator
The stock level to reorder at, safety stock for your service level, and days of cover remaining.
Open calculator →Return Cost Calculator
The true cost of a return — shipping both ways, handling, fees, markdown — and the orders needed to absorb one.
Open calculator →Get a calculation like this every morning
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Frequently asked questions
Are these Shopify calculators free?
Yes, every calculator here is free and runs entirely in your browser. Nothing you enter is sent anywhere unless you choose to email yourself the results.
Do the calculators use my real store data?
No. You enter your own numbers — prices, costs, and rates — and the calculation runs locally. Nothing is pulled from a platform price list, so the results stay accurate as fees change.
How accurate are the results?
They are estimates built from standard formulas, shown alongside the method so you can check the working. Enter figures from your own payout statements and supplier invoices rather than published rate cards for the most accurate output.
Related guides
- Shopify operations blog — the guides behind these numbers
- Revenue & Conversion — protect the margin these tools measure
- Daily briefing — same-day operational decisions