Know What You
Actually Earn
on Every Order
Calculate product costs, selling fees, shipping, advertising, returns, and true net profit before you list your products.
Why Ordinary Margin Calculators Miss Real Costs
Most basic calculators stop at Selling Price minus Product Cost. MerchSites tracks the entire ecommerce expense sequence to protect your cash flow.
Selling Price
Retail price collected
Product COGS
Landed factory cost
Outbound Shipping
Postage & packaging
Platform & Gateway Fees
Commission & fixed rates
Advertising CAC
Paid acquisition cost
Return Reserve
Damages & refunds
True Net Profit
What you actually earn
Looks Profitable vs What You Actually Earn
Here is how a $45 retail product with a $15 cost of goods looks on paper versus what actually reaches your bank account.
Ignores landed shipping, packaging, platform fees, gateway fixed costs, ad spend, and return reserves.
Calculators Built for Every Business Model
Product Margin Calculator
Calculate gross profit, net margin, total platform fees, fulfillment costs, and return risk per order.
Ecommerce Profit Calculator
Model complete order variable expenses, contribution profit, net margin, and monthly scaling projections.
Shopify Fee & Profit Calculator
Calculate Shopify plan costs, transaction fees, payment processing, app costs, and net profit per order.
Retail Margin Calculator
Calculate initial margin, maintained margin, shrinkage loss, and maximum markdown before loss.
Retail Price Calculator
Calculate recommended retail selling price from unit cost, target margin %, fees, and markdown allowance.
Wholesale Margin Calculator
Analyze wholesaler vs retailer profit margins, markups, and MSRP pricing side-by-side.
Frequently Asked Questions
Clear answers on how MerchSites calculates real profit.
Why do ordinary margin calculators miss true costs?
Basic margin calculators only subtract direct product purchase cost (COGS) from retail price. They ignore inbound landed shipping, packaging materials, platform referral fees, payment gateway fixed charges, return allowances, and ad spend.
Is MerchSites completely free to use?
Yes. All MerchSites calculators are 100% free with no account creation, no mandatory email signup, and no subscription paywalls.
Are my financial calculations saved or tracked?
No. All financial calculations take place securely in your web browser. MerchSites never saves or logs your secret pricing or supplier cost numbers.
Need Custom Ecommerce Engineering?
FergusonHQ designs and builds high-converting Shopify stores, custom Next.js storefronts, and tailored ecommerce integrations that scale profit.