Online Selling Calculators
Selling online looks simple until fees, shipping, ads, and returns each take a slice of every order. These calculators show profit per unit and per month so a busy shop does not turn out to be a broke one.
Margin is the number to watch. A thin margin leaves no room for a bad month.
Fees stack on every order
Etsy, eBay, Amazon, and print-on-demand each take listing, transaction, and payment cuts. Ads and returns can erase margin on thin SKUs. Profit per order matters more than revenue screenshots.
Inventory vs digital
- Marketplace resale: fast cash if you own inventory; sourcing takes hours.
- Etsy and handmade: fees, shipping, and returns per order.
- Print on demand: no warehouse, but lower margin and ad dependence.
- Digital products: higher margin, slower traffic ramp.
- Courses, paid newsletters, and affiliate: funnel math and content hours.
- Read is Amazon FBA worth it and is digital products worth it for margin tests.
Timeline expectations
Online selling is rarely a rent-due-this-month answer unless you already have inventory or buyers. Quick cash vs real business frames when a shop is a side project versus a primary income bet.
Etsy Profit Calculator
Estimate Etsy profit per order and per month after materials, shipping, fees, and ad spend.
Open calculator →Print on Demand Profit Calculator
Estimate print-on-demand profit after base cost, shipping, platform fees, and ad cost per sale.
Open calculator →eBay Reselling Profit Calculator
Estimate eBay reselling profit after purchase cost, fees, shipping, and return rate.
Open calculator →Facebook Marketplace Flipping Calculator
Estimate flipping profit after purchase, sale price, gas, and time per flip.
Open calculator →Amazon FBA Profit Calculator
Estimate Amazon FBA profit after product cost, FBA fees, shipping, storage, and ads.
Open calculator →Digital Products Profit Calculator
Estimate digital product profit from price, traffic, conversion, fees, and refunds.
Open calculator →Online Course Revenue Calculator
Estimate online course revenue after platform fees, refunds, traffic, and conversion.
Open calculator →Newsletter Income Calculator
Estimate paid newsletter income from subscribers, conversion, price, churn, and platform fees.
Open calculator →Affiliate Income Calculator
Estimate affiliate income from traffic, click-through rate, conversion, and commission.
Open calculator →Blog Ad Revenue Calculator
Estimate blog ad revenue from pageviews, RPM, network cut, and content costs.
Open calculator →This is an estimate, not advice
Every result here is a rough model based only on the numbers you enter. Sidequity is an informational tool and does not provide professional, tax, legal, investment, or financial advice, and it makes no income guarantees. Any tax set-aside is a planning placeholder, not a tax calculation.
For decisions that affect your money, taxes, or business, review your situation with a qualified professional. See our full disclaimer.