Practical ecommerce economics

Profit tools for ecommerce sellers

Free calculators that help online sellers understand margins, fees, advertising costs, and marketplace economics.

Seller calculators

TikTok Shop

Calculate the maximum TikTok Shop creator affiliate commission you can offer while preserving your target profit margin.

TikTok Shop

Calculate break-even and target-margin ROAS for TikTok Shop using product costs, referral fees, creator commission, refunds, and Smart Promotion.

Amazon

Calculate break-even ACoS, target ACoS, ROAS, and sustainable ad spend using your product's actual Amazon fees and costs.

Shopify

See how a Shopify discount affects profit, margin, payment fees, and the sales volume needed to match regular-price profit.

Etsy

Calculate the Etsy item price needed to cover product, labor, shipping, transaction, processing, listing, and Offsite Ads fees.

eBay

Find the maximum eBay Promoted Listings ad rate you can afford while protecting your target profit margin.

Amazon

Calculate the maximum Amazon PPC cost per click you can afford from your product economics and conversion rate.

Shopify

Find a free shipping threshold that protects your target profit margin.

Etsy

Calculate your break-even Etsy Ads spend, ROAS, and maximum cost per order.

Walmart

Find the minimum advertising ROAS your Walmart Marketplace product needs to remain profitable.

eBay

Find the lowest eBay Best Offer price you can accept while protecting your target profit margin.