E-Commerce Tools

Free ecommerce calculators for profit margin, break-even, inventory, and customer value. No sign-up, runs in your browser, your numbers stay on your device.

31 tools100% freeNo sign-upRuns in your browser
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Category: E-Commerce Tools
Tool Category Action
Ad Spend Calculator
 E-Commerce Tools Open
Amazon FBA Fee Calculator
 E-Commerce Tools Open
Average Order Value Calculator
 E-Commerce Tools Open
Break-Even Units Calculator
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Bundle Pricing Calculator
 E-Commerce Tools Open
Cart Abandonment Rate Calculator
 E-Commerce Tools Open
COGS Calculator
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Conversion Rate Calculator
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Customer Acquisition Cost Calculator
 E-Commerce Tools Open
Customer Lifetime Value Calculator
 E-Commerce Tools Open
Dimensional Weight Calculator
 E-Commerce Tools Open
Discount Pricing Calculator
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eBay Fee Calculator
 E-Commerce Tools Open
Ecommerce Profit Margin Calculator
 E-Commerce Tools Open
Economic Order Quantity Calculator
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Etsy Fee Calculator
 E-Commerce Tools Open
Gross Profit Calculator
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Inventory Turnover Calculator
 E-Commerce Tools Open
Marketing ROI Calculator
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Markup from Margin Calculator
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Net Profit Margin Calculator
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PayPal Fee Calculator
 E-Commerce Tools Open
Price Elasticity Calculator
 E-Commerce Tools Open
Reorder Point Calculator
 E-Commerce Tools Open
Retail Price Calculator
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ROAS Calculator
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Safety Stock Calculator
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Sales Tax Nexus Checker
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Shipping Cost Calculator
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Stripe Fee Calculator
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Wholesale Price Calculator
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Showing 1–31 of 31 tools

Top10k's ecommerce tools are free calculators for the numbers behind running an online store: pricing, profit, inventory, and customer value. They run in your browser, need no sign-up, and your figures never leave your device. Use them to check a margin before a sale, size a reorder, or test whether a product line actually pays.

The Ecommerce Profit Margin Calculator takes price, cost, and fees and returns gross and net margin so you can see what each sale really keeps. The Break-Even Units Calculator tells you how many units cover your fixed costs at a given margin. The Customer Lifetime Value Calculator turns average order value, repeat rate, and lifespan into a CLV figure you can compare against acquisition cost.

On the inventory side, the Reorder Point Calculator sets the stock level that triggers a new order from your lead time and daily sales, and the COGS Calculator totals the cost of goods sold for a period. For wider business math, see the finance and accounting categories; for ad and channel metrics, see marketing.

Frequently asked questions

What are the main ecommerce tools here?

Free calculators for store economics: profit margin, break-even units, customer lifetime value, COGS, reorder point, safety stock, economic order quantity, inventory turnover, and markup from margin. Each does one job and shows the formula.

Are these ecommerce tools really free?

Yes. Every calculator is free with no sign-up, no account, and no usage limits. They run entirely in your browser, so your prices, costs, and sales figures stay on your device.

Do these tools build an online store?

No. These are math tools for the numbers behind a store, not a store builder or hosting. Use them alongside your platform to check margins, set reorder points, and size customer value before you commit.

Which calculator should I start with?

Start with the Ecommerce Profit Margin Calculator to see what each sale keeps, then the Break-Even Units Calculator to find the volume that covers fixed costs. Add the Customer Lifetime Value Calculator when you compare against ad spend.