E-commerce Calculators
Calculate profit margins, Shopify fees, Etsy costs, Amazon FBA profitability, and discount impact. Know your numbers before you sell.
8 free tools · Instant results · No signup
E-commerce businesses fail most often not because of low sales, but because of margins that were never properly modeled. Platform fees, payment processing, returns, advertising, and shipping can easily consume 30–50% of revenue on a product that looks profitable at a glance. These calculators help you model the real economics of selling on Shopify, Etsy, Amazon FBA, or your own store — before you stock inventory. The profit margin calculator works across any product type. The Amazon FBA calculator includes current FBA fee schedules, referral rates by category, and storage costs. The discount impact calculator shows the exact increase in volume needed to maintain profit after a price reduction — a calculation most sellers skip entirely.
Profit Margin Calculator
Calculate gross, operating, and net profit margins for any business in seconds.
Amazon FBA Profit Calculator
Calculate Amazon FBA profit after fulfillment fees, referral fees, and product cost.
Shopify Pricing Calculator
Calculate the true all-in cost of selling on Shopify across all plan tiers.
Etsy Fees Calculator
Calculate all Etsy seller fees including listing, transaction, and payment processing fees.
Discount Impact Calculator
Understand how discounts affect profit margins and how much extra volume you need to compensate.
Dropshipping Profit Calculator
Calculate true dropshipping profit margins after ads, fees, and return costs.
Wholesale Price Calculator
Calculate the right wholesale price that covers costs and leaves retailer margin.
Inventory Turnover Calculator
Calculate inventory turnover ratio, days outstanding, and excess cash tied up in stock.