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Free Seller Calculators & Image Tools
Choose a tool for order profit, pricing, shipping, product photos or listing drafts. No signup required. Read the formula or compatibility notes on each page.
Marketplace profit
Pricing, advertising and operations
Images
Listing drafts
Specific image conversions
Choosing the right tool
Use a marketplace calculator for individual orders, the wholesale tool for unit margins, or the CSV calculator for a product list. Resize to change pixel dimensions; convert to change file format. Browser interpolation enlarges pixels, while experimental AI tools depend on model and device support.
Resize to a common file-size target
Start with a preset and adjust the dimensions to match your upload requirements. File-size targets are approximate.