US E-commerce • Free • No login
Simple calculators for US e-commerce sellers.
Price smarter, understand fees, and plan ad spend with clear formulas and fast results.
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Profit Margin Calculator
See your true net profit and net margin after COGS, platform fees, payment fees, shipping, and ads.
Open calculator →Avoid mistakes
Break-even Price
Find the minimum price you can sell for without losing money—before you launch or run ads.
Open calculator →Ad planning
Ad Cost per Order
Calculate the maximum ad spend per order you can afford while still hitting your target margin.
Open calculator →Why SimpleTools
Built to pass the “thin content” trap.
Every calculator includes how it works, formulas, examples, and FAQs—so you can trust the result and learn the reasoning behind it.
No login
Use instantly. No accounts, no gated access.
US-first
USD, percent-based fees, ad spend per order.
Clear formulas
Transparent calculations you can verify.