Calculadora de Precificação e ROAS para E-commerce
Calcule preço recomendado, break-even e ROAS necessário após custos, taxas, devoluções e anúncios.
Conceitos-chave
ROAS
Return on ad spend — revenue generated per dollar of advertising.
Contribution margin
Revenue left after variable costs (product, shipping, fees), before or after ads depending on framing.
O que esta ferramenta faz
Price for the funnel, not just COGS
A 3× markup on product cost can still lose money after payment fees, returns, and paid acquisition. This calculator solves for a price that protects your margin and shows the ROAS your ads must hit.
How to use this tool
Enter unit costs, fees, return rate, ad spend, and target margin. Scenario B compares a cheaper SKU or leaner ad spend.
Formulas used
Price ≈ Fixed per-order costs / (1 − returns − fees − margin) Required ROAS ≈ Price / Max ad spend that still leaves target profit
Fixed per-order costs include COGS, shipping, other fees, and planned ad spend when solving price. ROAS uses contribution after variable costs.
Worked example
COGS $25, shipping $5, 2.9% fees, $1 other fees, $12 ads, 5% returns, 30% target margin. The tool recommends a price, shows break-even, and estimates the ROAS needed so advertising does not erase profit.
Decision checklist
0/5 marcados
Marque os itens conforme valida sua decisão.
Common mistakes
- Ignoring returns and chargebacks.
- Treating ROAS targets as optional after pricing.
- Forgetting marketplace commissions in other fees.
Methodology on this page
Unit-economics model for education. It does not allocate fixed overhead like salaries or software unless you add them into other fees.
Read the full FinTools4U methodology →Perguntas frequentes
Is higher ROAS always better?
Higher ROAS means more revenue per ad dollar, but growth may require accepting a lower ROAS within a profitable range.
Where do I put Shopify/Amazon fees?
Add percentage fees into payment fee or fixed marketplace fees into other fees per order.
Can I model two products?
Yes — use Scenario B for an alternate cost or margin target.
Does this include VAT/sales tax?
Not explicitly. If tax is additive at checkout, keep prices ex-tax consistently.
Sources & further reading
- SBA — Pricing strategies — Small business pricing primer.