Free tools for online sellers
Know your profit before you set the price.
Pick your platform. Each calculator shows every fee, your real profit per sale, and the price that hits your target margin.
~9.5% + $0.45EtsyTransaction, processing, listing and Offsite Ads fees.~13.6% + $0.40eBayFinal value fee, per-order fee, promoted listings.15% + FBAAmazonReferral, FBA, storage and plan fees, FBA or FBM.2.9% + $0.30ShopifyCard processing, plan cost per order, apps and ads.6% + creatorTikTok ShopReferral fee plus creator commission.
Which platform keeps the least?
On a $30 sale, TikTok Shop's 6% referral fee is usually the lowest platform fee, but creator commissions can push the total higher. Etsy takes about 10% to 11%. eBay takes around 14% to 15%. Amazon's 15% referral fee plus FBA often adds up to a third of a low-priced item. Shopify takes the least per order, but you pay for your own traffic.
The right answer depends on your costs. Run the same product through two or three calculators to compare.