About Margin Manifest

Margin Manifest is a collection of practical planning calculators for independent ecommerce sellers. The goal is simple: make unit economics easier to see before you change a price, launch an ad, or approve a shipment.

How estimates are made

Each calculator uses the inputs you provide and shows its core formula. Marketplace, tax, carrier, and payment rules vary by account and change over time, so the site favors editable rates over pretending there is one universal answer.

Independence

Margin Manifest is not affiliated with Etsy, Amazon, eBay, or any carrier or payment provider. Product and company names belong to their respective owners.