7 free tools
E-commerce tools built for real work
Pricing, margin, marketplace, shipping and product economics utilities for online sellers. Every tool is designed to expose its inputs and outputs clearly instead of hiding the logic behind a vague score.
🛒Bundle Pricing CalculatorEstimate a bundle selling price, discount, gross profit and margin from individual item values and bundle cost.→🛒Discount vs Profit CalculatorMeasure how a price discount changes unit profit, margin and the sales-volume increase needed to preserve gross profit.→🛒EAN/UPC Check Digit CalculatorCalculate or validate UPC-A, EAN-8 and EAN-13 check digits locally in your browser.→🛒Landed Cost CalculatorEstimate landed cost per unit by combining product cost, freight, duty, taxes and other import or fulfilment charges.→🛒Listing Title Length CheckerCount listing title characters and words against a configurable marketplace title limit.→🛒Return Rate Profit Impact CalculatorEstimate how product returns affect retained orders, revenue and contribution profit.→🛒Shipping Dimensional Weight CalculatorCalculate dimensional weight and compare it with actual weight using an editable carrier divisor.→
Why ToolboxKart E-commerce tools?
Fast interfaces, plain-language explanations, mobile-friendly layouts and no unnecessary account wall for the utilities in this release.
Tool first
The working interface appears before long-form SEO content, so you can finish the task quickly.
Transparent logic
Calculators disclose formulas or assumptions where they matter, and analyzers avoid pretending subjective checks are scientific facts.
Reusable results
Copyable output and clean formatting are included where they improve the workflow.