Free reseller tools

Make the numbers work before you list.

Practical calculators and listing tools for marketplace sellers. Every tool is free with a Prismalist account—no paid plan required.

Compare seller take-home

Marketplace Fee Calculator

Compare estimated selling fees and profit across eBay, Etsy, Poshmark, Mercari, Depop, and Facebook Marketplace.

Know the real margin

Calculate profit, margin, ROI, break-even revenue, and a suggested tax reserve after every cost.

Plan package costs

Estimate shipping ranges and compare actual weight with dimensional weight before choosing a carrier.

Write search-ready titles

Build clean marketplace-specific listing titles from the brand, item details, condition, style, and keywords.

Create relevant tags

Generate focused hashtag sets for Depop, Poshmark, Instagram, and TikTok without irrelevant keyword stuffing.

Plan for 2026 taxes

Estimate U.S. federal income tax, self-employment tax, state reserve, and quarterly payments for planning.