Free seller tools
免费卖家工具
Fee math and listing checks — no account, no sales estimates.
费用测算与 listing 检测 —— 无需账号，不估销量。
Etsy fee calculator
Etsy 费用计算器
Quick pocket profit, reverse pricing, and planning costs on top of Etsy’s published fee rules.
按 Etsy 公开规则算到手、反推定价，并叠加规划成本。
Open →打开 →eBay fee calculator
eBay 费用计算器
Final Value Fee + per-order fee on one SKU — see pocket before you promote.
单笔 Final Value Fee + 订单费 —— 投广告前先算到手。
Open →打开 →Amazon FBA calculator
Amazon FBA 计算器
Referral + FBA fulfillment on a single item — planning aid, not inventory forecasting.
单笔 referral + FBA 履约费 —— 规划用，不做库存预测。
Open →打开 →Shopify fee calculator
Shopify 费用计算器
Card rates and optional plan share per order for storefront contribution profit.
卡费率与可选月费分摊，算店铺贡献利润。
Open →打开 →Compare four platforms
四平台对比
One price, one COGS — pocket profit side by side with pre-publish audit links.
同一售价与成本 —— 并排看到手，并链到发布前检测。
Open →打开 →Selling on Etsy?
也在 Etsy 卖？
Fee calculators won’t fix a 794px hero or empty tag slots. Run the full listing check first.
费用计算器修不好 794px 主图或空标签。先做全面 listing 检测。