12 tools
Ecommerce tools
Margins, shipping, ad spend, and inventory calculators.
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Breakeven ad spend calculator
Free breakeven ad spend calculator. Enter your average order value, product margin, and target profit margin to see the maximum you can afford to spend acquiring a customer through ads.
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Bulk product image cropper
Drag in product photos, pick a target aspect ratio, then choose pad (contain) or crop (fill). Download all resized images as a ZIP. Runs entirely in-browser via Canvas API — nothing is uploaded.
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Bundle pricing lift calculator
Enter individual product prices and costs, then find the bundle price that maximises revenue per order without dropping below your target margin.
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CSV variant builder for bulk uploads
Generate all product variant SKU combinations (size × colour × material) and export a Shopify or WooCommerce-ready CSV. Enter option names and values — the tool builds every combination instantly in the browser.
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Customer acquisition cost calculator
Free ecommerce CAC calculator. Enter your ad spend, other marketing costs, and new customers acquired to see your cost per acquisition, first-order economics, and how many repeat purchases it takes to recover your acquisition spend.
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DTC vs wholesale margin comparison
Compare direct-to-consumer vs wholesale margin side by side. Enter retail price, CAC, and costs to see which channel generates more profit per unit and the break-even DTC acquisition cost.
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Free shipping threshold calculator
Enter your shipping cost, gross margin, and target profit margin to find the minimum order value at which offering free shipping stops costing you money.
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Inventory turnover calculator
Free inventory turnover calculator for ecommerce. Enter your cost of goods sold and average inventory value to see turnover ratio, days of stock on hand, and how much cash is tied up in slow-moving inventory.
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Product margin calculator
Free product margin calculator for ecommerce sellers. Enter your selling price, cost of goods, shipping, and platform fees to see your gross profit, margin %, and markup % per unit sold.
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Return rate impact calculator
Free return rate impact calculator for ecommerce. Enter your orders, return rate, average order value, gross margin, and processing cost per return to see the true monthly cost of returns and your effective margin after them.
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Shipping cost comparison tool
Compare USPS, UPS, and FedEx shipping costs side by side. Enter package weight, dimensions, and destination zone to see estimated carrier rates and which service is cheapest.
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Subscription box LTV calculator
Enter your box price, COGS, fulfilment cost, shipping, churn rate, and acquisition cost to see true customer lifetime value and LTV:CAC ratio for a physical subscription business.