Seller
Tools
Free calculators for e-commerce sellers. No signup, no email, no BS.
TikTok Shop Profit Calculator
Net margin after all fees: referral, FBT, affiliate, shipping
Marketplace Fee Comparison
Etsy vs TikTok vs Amazon vs Shopify vs eBay, side by side
Etsy Star Seller Calculator
Will you keep your badge? Enter your metrics and find out
Roblox Game Revenue Calculator
DAU → Robux → DevEx → USD → after tax. The full pipeline.
Quarterly Tax Estimator
How much to set aside for 1099 / self-employment taxes