E-commerce Calculators
Amazon FBA Fee Calculator
Estimate net proceeds on an Amazon FBA listing after referral fee, fulfillment fee, and storage fee are subtracted from the item price precisely.
Average Order Value Calculator
Determine average order value by dividing total revenue by number of orders, a core metric for tracking per-transaction spending over time.
Break-Even Sales Calculator
Find the exact unit volume and revenue needed to cover fixed costs, based on price per unit and variable cost per unit for any product.
Customer Acquisition Cost Calculator
Calculate customer acquisition cost by dividing total marketing spend by new customers acquired, for comparing channel efficiency directly and fairly.
Dropshipping Profit Calculator
Compute per-unit and total profit for a dropshipping product after supplier cost, shipping, platform fees, and ad spend are all subtracted.
E-commerce Profit Calculator
Calculate true profit and margin on any online sale after subtracting cost of goods, fees, shipping, and ad spend from total revenue directly and precisely.
Markup Calculator
Calculate markup percentage from cost and selling price, plus a conversion table showing the equivalent profit margin for each markup level shown.
Product Margin Calculator
Compute profit margin as a percentage of selling price from any price and cost pair, with a comparison table showing exactly how margin scales.
Return Rate Calculator
Calculate product return rate from units returned and units sold, with scenario comparisons showing how the percentage changes with sales volume.
Shopping Cart Abandonment Calculator
Determine your cart abandonment rate from carts created and completed purchases, with scenario comparisons showing how the ratio shifts by volume.
Where Online Sellers Actually Lose Their Margin
E-commerce margins get eaten by costs that don't show up until you actually calculate them — marketplace fees, fulfillment costs, return rates, and cart abandonment all quietly erode what looks like a healthy markup on paper. These calculators surface those numbers directly, from per-order profit to storefront-wide conversion metrics.
Popular E-commerce Calculators
Ten tools span marketplace fees, margins, and store metrics:
- Amazon FBA Fee Calculator — totals referral fees, fulfillment fees, and storage costs to find true per-unit profit on Amazon.
- Product Margin Calculator — finds profit margin per product after cost of goods, fees, and shipping.
- Dropshipping Profit Calculator — calculates margin after supplier cost, platform fees, and advertising spend.
- Shopping Cart Abandonment Calculator — measures what percentage of started checkouts never complete.
- Average Order Value Calculator — finds the average revenue per order across a given period.
Why Marketplace Fees Compound Faster Than Expected
A product listed at a healthy-looking markup can still be barely profitable once every fee layer is applied — a marketplace referral fee, a separate fulfillment fee based on size and weight, monthly storage fees, and payment processing all stack on the same sale, and each is calculated independently rather than as one combined percentage. This is why experienced sellers calculate landed cost and full fee stack per SKU before pricing, rather than applying a flat markup percentage across an entire catalog, since the same markup can be highly profitable on one product and a loss on another once fulfillment size and fee tiers are factored in.
Frequently Asked Questions
Is a high cart abandonment rate always a problem?
Some abandonment is normal — industry averages often run 60–80% — but a rate meaningfully above that for a specific store can point to checkout friction, unexpected shipping costs, or a trust issue at payment.
Does average order value matter more than total revenue?
They answer different questions — AOV shows whether upsells, bundling, or pricing changes are working, while total revenue also depends on traffic and conversion rate, so both are usually tracked together.
Explore More
Running paid traffic to your store? See the Advertising Calculators, or check broader business metrics in the Business Calculators.