Built for Shopify sellers
The Decision Math Shopify's Built-In Tools Don't Do
Shopify tells you what sold. These calculators tell you whether it was worth it — and what to charge, bid, order, and discount next time so the margin stays healthy.
The six numbers Shopify sellers get wrong most often
Enter your product cost and selling price. Get gross margin, markup, profit per unit, and a plain-English benchmark against healthy e-commerce ranges.
Enter COGS, fulfillment, and selling price. Get the exact ROAS floor your Meta, Google, or TikTok campaigns need before they stop losing money.
Enter your margin and discount percentage. Get the unit volume lift you need to maintain the same gross profit — the number that kills most promo plans.
Enter daily sales, lead time, and safety stock target. Get the exact inventory level at which to place the next purchase order — before you stock out.
Model how your return rate affects net margin and the true cost per returned unit — critical for products with a high return rate on Shopify.
Enter monthly burn and current cash balance. Get months of runway and a cash depletion date — useful for planning ad spend limits and hiring decisions.
The Shopify margin trap most sellers fall into
Shopify's dashboard shows revenue, orders, and conversion rate. It does not show you the margin after COGS, fulfillment, returns, and ad spend — so most sellers optimize for revenue and discover the margin problem quarters later.
Gross margin = (Revenue − COGS) ÷ RevenueNet margin after ads = Gross margin − (Ad spend ÷ Revenue)Break-even ROAS = 1 ÷ Gross margin
A store with 35% gross margin and a 2.0x ROAS is losing money on every ad-driven sale. The margin calculator and break-even ROAS tool catch this before the campaign runs — not after the credit card statement arrives.
What these tools are — and are not
What they do
- Answer a specific pricing, ad, inventory, or cash question in under a minute
- Benchmark the result against healthy ranges for your type of business
- Translate the number into a plain-English recommendation
- Save scenarios so you can revisit the same assumptions next week (Pro)
What they are not
- A Shopify app — they work in your browser, not inside Shopify admin
- An accounting tool — they model decisions, not record transactions
- A replacement for analytics — Shopify Analytics and Triple Whale still own attribution
- A full financial model — for 3-year projections, use a dedicated tool
Frequently asked questions
Does this work for Shopify stores selling internationally?
Yes — all calculators support any currency. Select your currency in the top navigation and all results update to match. Exchange rate impact on margin is a manual adjustment (enter your landed cost in your operating currency).
How do I factor in Shopify transaction fees in my margin?
Add transaction fees to your COGS or fulfillment cost field in the margin calculator. Shopify Payments fees (typically 0.5–2.0% of revenue depending on plan) reduce effective margin and should be included in any accurate margin calculation.
What ROAS should I target on Shopify ads?
Your break-even ROAS is the floor — that is where you stop losing money on the ad spend itself. A healthy profit target is typically 1.5–2× your break-even ROAS. The break-even ROAS calculator gives you your floor based on your actual margin, not a generic 3x rule.
Start with the margin calculator — no account required.
Open Margin Calculator →See all calculators