Rekenhulpen
Praktische hulpmiddelen om winst, kosten, verzending, marge en break-even prijs te schatten voordat je online verkoopt.
Estimate net profit after marketplace fees, item cost, shipping, packaging, and promotion.
RotoCurveShipping margin calculatorCompare customer shipping charge with label cost, packaging, and insurance.
RotoCurveBreak-even price calculatorFind the minimum price needed to cover costs and fees.
RotoCurveROI and margin calculatorCompare return on investment with profit margin for resale decisions.
RotoCurveDiscount profit calculatorSee how coupons, offers, and markdowns change seller profit.
RotoCurveReturn rate calculatorEstimate how returns affect real net profit over a group of orders.
RotoCurveAd spend break-even calculatorEstimate how much ad cost a sale can absorb before profit disappears.
RotoCurveInventory turnover calculatorCheck how quickly stock needs to sell before cash is trapped.
RotoCurveFree shipping threshold calculatorEstimate whether free shipping should be built into price or avoided.
RotoCurvePayment processing fee calculatorEstimate card or payment processor costs before pricing an item.
Quality and usage notes
This page is intended to help users make clearer planning decisions with transparent assumptions. Results are estimates and should be checked against official sources when money, taxes, shipping, or marketplace rules are involved.
How to use this page well
Use this page as a planning aid, not a final quote or official rule. Replace defaults with your own numbers, compare more than one scenario, and check any important fee, tax, carrier, or marketplace policy against the official source before acting.
- Use real costs instead of rounded guesses whenever possible.
- Review the result together with shipping, returns, discounts, taxes, and payment fees.
- Save or repeat the calculation when costs change, because small inputs can change profit quickly.