---
title: "Profit, Platform Fee & ROAS Calculators | Product Metrics"
description: "Which profit calculator fits your sales channel? Compare Etsy, eBay, Amazon, Walmart and TikTok Shop fees, store payment costs and dropshipping risk."
canonical: "https://www.productmetrics.io/calculators"
pageType: hub
language: en
publisher: "Product Metrics"
dateModified: 2026-10-15
---

> Content index: https://www.productmetrics.io/llms.txt

# Profit, platform fee and ROAS calculators

Pick the calculator that matches where the order is paid. Compare marketplace fees, store payment and running costs, or dropshipping supplier recovery. Each page works out profit per order, maximum ad spend and break-even ROAS in US dollars. No account required.

_By [Berend Vrakking](https://www.linkedin.com/in/berend-vrakking), Founder · Updated 15 October 2026_

## Contents

- [Which calculator should I use?](#which-calculator-should-i-use)
- [Which calculator fits a marketplace seller?](#which-calculator-fits-a-marketplace-seller)
- [Which calculator fits a seller with their own store?](#which-calculator-fits-a-seller-with-their-own-store)
- [Which calculator fits a dropshipper?](#which-calculator-fits-a-dropshipper)
- [When do I need the margin, break-even ROAS or POAS calculator instead?](#when-do-i-need-the-margin-break-even-roas-or-poas-calculator-instead)
- [Questions about the platform calculators](#questions-about-the-platform-calculators)

## Which calculator should I use?

Choose the calculator for the place where the customer pays you. Check marketplace and fulfilment fees for a marketplace order, payment and running costs for your own store, or supplier recovery and acquisition costs for dropshipping. Replace the example costs with your own before deciding how much an order can support in advertising.

| Platform | Where you sell | Fees the calculator starts with | What this page adds | Starting profit per order | Calculator |
| --- | --- | --- | --- | --- | --- |
| Shopify | Own store | payment processing fee: 2.9% + $0.30 | Optional third-party gateway fee on top of card processing, with the monthly plan as overhead | $22.96 | [Shopify Fee Calculator](https://www.productmetrics.io/calculators/shopify-fee-profit-calculator) |
| Etsy | Marketplace | transaction fee: 6.5%; Etsy Payments fee: 3% + $0.25; listing fee: $0.20 | Offsite Ads toggle: 15% until qualified, 12% after, capped at $100 per order | $15.84 | [Etsy Fee Calculator](https://www.productmetrics.io/calculators/etsy-fee-profit-calculator) |
| eBay | Marketplace | final value fee: 13.6%; per-order fee: $0.30 up to $10.00, $0.40 above | Tiered final value fee, the per-order charge and the ROAS a promoted listing rate implies | $31.90 | [eBay Fee Calculator](https://www.productmetrics.io/calculators/ebay-fee-profit-calculator) |
| WooCommerce | Own store | payment gateway fee: 2.9% + $0.30 | Payment gateway choice (WooPayments, Stripe, PayPal) and hosting, plugin and theme costs spread over your monthly orders | $25.02 | [WooCommerce Profit Calculator](https://www.productmetrics.io/calculators/woocommerce-fee-profit-calculator) |
| Amazon | Marketplace | referral fee: 15%; FBA fulfilment fee: your amount (starts at $0.00); storage and inbound allocation: your amount (starts at $0.00) | Your own FBA fulfilment and storage quote, and ACOS entered on the same revenue basis as ROAS | $13.00 | [Amazon Profit Calculator](https://www.productmetrics.io/calculators/amazon-fee-profit-calculator) |
| Dropshipping | Dropshipping | payment processing fee: 2.9% + $0.30 | Supplier recovery on returns, chargeback losses with the dispute fee, and the maximum ad spend per order at your margin | $3.62 | [Dropshipping Profit Calculator](https://www.productmetrics.io/calculators/dropshipping-profit-calculator) |
| Walmart | Marketplace | referral fee: 15%; WFS fulfilment fee: $3.45; WFS add-ons and storage allocation: your amount (starts at $0.00) | WFS weight bands compared with seller-fulfilled shipping | $15.30 | [Walmart Fee Calculator](https://www.productmetrics.io/calculators/walmart-fee-profit-calculator) |
| TikTok Shop | Marketplace | referral fee: 6% | Creator commission on top of the referral fee, off by default | $14.02 | [TikTok Shop Fee Calculator](https://www.productmetrics.io/calculators/tiktok-shop-fee-profit-calculator) |

_Illustrative data. Starting profit uses each page’s own example order in US dollars; your fees, category and costs will differ._

## Which calculator fits a marketplace seller?

Use a marketplace calculator when the platform takes a fee from every sale: a category referral or final value fee, plus fulfilment or listing charges. Each page adds the charge that is specific to that marketplace.

- [Etsy Fee Calculator](https://www.productmetrics.io/calculators/etsy-fee-profit-calculator): Offsite Ads toggle: 15% until qualified, 12% after, capped at $100 per order
- [eBay Fee Calculator](https://www.productmetrics.io/calculators/ebay-fee-profit-calculator): Tiered final value fee, the per-order charge and the ROAS a promoted listing rate implies
- [Amazon Profit Calculator](https://www.productmetrics.io/calculators/amazon-fee-profit-calculator): Your own FBA fulfilment and storage quote, and ACOS entered on the same revenue basis as ROAS
- [Walmart Fee Calculator](https://www.productmetrics.io/calculators/walmart-fee-profit-calculator): WFS weight bands compared with seller-fulfilled shipping
- [TikTok Shop Fee Calculator](https://www.productmetrics.io/calculators/tiktok-shop-fee-profit-calculator): Creator commission on top of the referral fee, off by default

## Which calculator fits a seller with their own store?

Use a store calculator when you take the payment yourself. There is no marketplace commission, so the payment gateway, the plan or hosting bill and your shipping decide how much of each order is left.

- [Shopify Fee Calculator](https://www.productmetrics.io/calculators/shopify-fee-profit-calculator): Optional third-party gateway fee on top of card processing, with the monthly plan as overhead
- [WooCommerce Profit Calculator](https://www.productmetrics.io/calculators/woocommerce-fee-profit-calculator): Payment gateway choice (WooPayments, Stripe, PayPal) and hosting, plugin and theme costs spread over your monthly orders

## Which calculator fits a dropshipper?

Use the dropshipping calculator when a supplier ships the order. Nobody charges a dropshipping fee, so the risk sits in supplier cost, refunds, chargebacks and what you can afford to spend on ads.

- [Dropshipping Profit Calculator](https://www.productmetrics.io/calculators/dropshipping-profit-calculator): Supplier recovery on returns, chargeback losses with the dispute fee, and the maximum ad spend per order at your margin
- [Dropshipping break-even ROAS and CPA calculator](https://www.productmetrics.io/calculators/dropshipping-break-even-calculator): Calculate your maximum CPA and CPC, then estimate a click-based ad test in euros.

## When do I need the margin, break-even ROAS or POAS calculator instead?

Use a generic calculator when you have no platform fee to subtract, or when you only need one number. The margin calculator turns cost and price into margin or markup. The break-even ROAS calculator and the POAS calculator work from the contribution you already know.

- [Margin and markup calculator](https://www.productmetrics.io/margin-calculator): Generic, retail and ecommerce margin before platform-specific deductions.
- [Break-even ROAS calculator](https://www.productmetrics.io/break-even-roas-calculator): Find the advertising return your costs require.
- [POAS calculator](https://www.productmetrics.io/poas-calculator): Translate contribution margin into profit on ad spend.

- [Browse all free tools](https://www.productmetrics.io/tools)

## Questions about the platform calculators

### Which profit calculator should I use for my platform?

Use the calculator named after the place the customer pays you. Marketplace calculators apply category fees, store calculators apply payment gateway fees, and the dropshipping calculator adds supplier, refund and chargeback losses. Start with the page that matches your checkout, then change any fee to match your account.

### How is a platform calculator different from the margin calculator?

The margin calculator turns a cost and a price into margin or markup. A platform calculator also subtracts that platform’s fees, shipping, returns and ad spend, then shows your maximum ad spend and break-even ROAS. Use the margin calculator for a quick price check and a platform calculator for order profit.

### Are the fee presets current?

Presets come from each platform’s official fee pages, checked on 15 October 2026 and due for review on 15 January 2027. Fees change by category, plan and country, so edit any preset to match your account. Each page links the documents it used and says what it leaves out.

### Do these calculators work outside the United States?

No. They use US dollars and US fee schedules, and each page says what its presets cover. Fees, taxes and rates differ in other countries. For margin, break-even ROAS and POAS in euros or other currencies, use the generic calculators, which have their own currency controls.

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Published by Product Metrics (Berend Vrakking, founder).

HTML version: https://www.productmetrics.io/calculators