9 free seller tools
Find the right calculator.
Start with platform fees, then price for your costs or check what you can spend on ads. Every tool runs in your browser, with a worked guide and clear assumptions.
Independent tools. Platform names identify the services covered; no platform affiliation or endorsement.
US platform fees
Know what each order leaves.
eBay fees & profit
Store plans, supported categories, buyer tax and entered costs.
Open calculator Etsy · USEtsy fees & profit
Transaction, payment and attributed Offsite Ads fees.
Open calculator Amazon · USAmazon fees & profit
Compare FBM and FBA costs, then see the profit left from one order.
Open calculator Shopify · USShopify order profit
Separate payment fees, monthly costs and ads to see what one order leaves.
Open calculatorPricing & discounts
Build a price around your costs.
Profit margin & markup
Check margin and markup, or find the price for a target percentage.
Open calculator eBay · USBreak-even & target price
Find the lowest cent price covering eBay fees, costs and a dollar profit target.
Open calculator eBay · USDiscount profit impact
Keep costs fixed and compare the original and discounted order.
Open calculatorAds & comparison