DTC founders
Get a clearer view of what each order contributes before changing price, costs or growth plans.
ABOUT DTCSTACK
Clearer numbers for the decisions behind your store.
DTCStack is an independent library of free ecommerce calculators, product SEO utilities and practical guides for DTC founders.
No accountFree toolsYour assumptions
WHY THIS EXISTS
A practical toolkit for the numbers that shape a business.
Running an online store means making connected decisions about price, product cost, fulfillment, payment fees, promotions and advertising. Those numbers are often spread across dashboards and spreadsheets, while the question in front of you is simple: what does this order leave behind, or what can I afford to spend to acquire it?
DTCStack brings focused calculators and plain-language explanations together in one place. It is built for founders and operators who want to test an assumption, understand what a result includes, and decide what to check next.
THE TOOL LIBRARY
Practical tools for costs, growth and product data.
The current library covers imported unit cost, processing fees, order contribution, acquisition limits, shipping and discount decisions, Product JSON-LD and search-result copy for product pages, plus a browser-based cleaner for copied product HTML. The inventory reorder planner also estimates replenishment quantities and purchasing funds by location and supplier terms.
FEES & UNIT ECONOMICS
Shopify & Stripe Fee / Profit Margin Calculator
Calculate the fees, contribution profit, margin and acquisition limits behind every Shopify order.
Currency: USD only. Enter every amount in USD; the dollar symbol does not convert currencies.
Open calculatorAD SPEND & ROASBreak-Even ROAS & Max CPA Calculator
Calculate break-even ROAS, maximum allowable CPA and pre-ad profit margin from your product, shipping and gateway costs.
Currency: USD only. Enter every amount in USD; the dollar symbol does not convert currencies.
Open calculatorPAYMENT PROCESSING FEESStripe & Payment Gateway Fee Calculator
Estimate Stripe or PayPal Checkout fees, net proceeds, and the minimum customer charge for a target amount.
Currencies: USD and EUR. Presets use their stated currency; custom rates let you model USD or EUR. No exchange-rate conversion is performed.
Open calculatorSOURCING & LANDED COSTCross-Border Landed Cost Calculator
Estimate true unit cost after factory price, freight, insurance, customs duty, optional import VAT, and local fulfillment.
Currency: USD only. Use USD for every cost; this calculator does not convert currencies.
Open calculatorPRODUCT SEO & STRUCTURED DATAShopify Product Schema (JSON-LD) Generator
Build Product and Offer JSON-LD from real product details, preview the script, and check a published product URL with Google.
Currencies: USD, EUR, and GBP for the generated Offer price. This sets the currency code; it does not convert the price.
Open calculatorPRODUCT PAGE SEOProduct Title & Meta Description SEO Checker
Check product page title and meta description length, estimated pixel width, target keyword use, and desktop or mobile search previews.
Currency: not applicable. This tool checks search copy and previews; it does not calculate prices.
Open calculatorAMAZON FULFILLMENT ECONOMICSAmazon FBA vs. FBM Profit Comparison Calculator
Compare Amazon FBA and seller-fulfilled profit, fees and margins using your selling price, referral rate, shipping, fulfillment and storage assumptions.
Currency: USD only. Enter every amount in USD; the dollar symbol does not convert currencies.
Open calculatorSHIPPING & CART ECONOMICSFree Shipping Threshold Calculator
Plan a free shipping minimum from average order value, shipping cost, gross margin and desired basket lift, with a live cart banner preview.
Currency: USD only. Enter every amount in USD; the dollar symbol does not convert currencies.
Open calculatorPROMOTIONS & MARGINDiscount & Margin Impact Calculator
Calculate the order volume lift a discount needs to preserve total contribution, with the profit gap at unchanged sales volume.
Currency: USD only. Enter every amount in USD; the dollar symbol does not convert currencies.
Open calculatorPRODUCT CONTENT & HTMLHTML to Shopify Description Cleaner
Strip pasted inline styling and unsafe markup while preserving useful product-description structure, links and images.
Currency: not applicable. This tool cleans product-description HTML and does not calculate prices.
Open calculatorINVENTORY & REPLENISHMENTShopify Inventory Reorder Planner
Match Shopify inventory and SKU sales CSVs to estimate stock coverage, reorder quantities and purchasing funds for one selected location.
CSV files are read in this browser tab. Costs use your custom currency code; no currency conversion is performed.
Open calculatorSKU PROFIT & AD EFFICIENCYBulk SKU Profit Auditor
Audit product CSVs for per-SKU contribution profit, ad headroom, break-even ROAS and target-price gaps using your own fee assumptions.
Choose one currency for the full file. Currency columns are checked; no exchange-rate conversion is performed.
Open calculatorPRODUCT DATA & CSVShopify Product CSV Checker
Check a Shopify product CSV for header, handle, variant, price and formatting issues in your browser before import.
No currency conversion. This checker reviews Shopify product CSV structure and values; it does not validate Google Merchant Center feeds.
Open calculatorWHO IT HELPS
For the people making the numbers add up.
Store operators
Compare product, fulfillment and payment assumptions without rebuilding a spreadsheet for every scenario.
Growth teams
Connect order margin to a break-even ROAS and maximum acquisition cost under your own inputs.
HOW WE BUILD
Useful answers need visible assumptions.
Keep the inputs in your hands
Enter your own rates and assumptions. Currency support varies by tool, and selecting a currency never performs exchange-rate conversion.
Show the model
A result is only as useful as the assumptions behind it. We aim to explain what each tool includes, what it leaves out and how its formula works.
Focus on one decision
Each tool is designed to answer a specific operating question without asking you to set up another dashboard or workflow.
A SIMPLE WAY TO USE DTCSTACK
From a question to a more informed next step.
- 01
Choose the question
Pick the calculator that matches the decision in front of you, such as order profit or break-even ROAS.
- 02
Use your real assumptions
Replace example values with the rates and costs that reflect your product, market and payment setup.
- 03
Check the result in context
Read the formula and exclusions, then compare the estimate with your own records before acting.
A planning aid, not a substitute for your records.
A calculator can make a model easier to inspect; it cannot know every cost or circumstance in your business. Results are estimates, and should be checked against your store data, accounting records and professional advice where appropriate.
DTCSTACK
Start with the number you need to understand.
Explore the tool library and choose one practical question to work through.
Explore free tools