Amazon FBA Calculator

What it does

Provides a calculator-oriented workflow for FBA size tier, fulfillment, storage, referral fees, margin, and ROI.

When to use

Use it to compare product dimensions, supplier quotes, price points, or FBA versus alternative fulfillment assumptions.

Inputs

• Packaged length, width, height, shipping weight, and units.
• Selling price, product cost, inbound shipping, and category.
• Expected storage period, returns, advertising, and other operating costs.

Outputs

• Estimated size tier and fee breakdown.
• Gross profit, net margin, and ROI estimates.
• Sensitivity notes for dimensions, weight, price, and rate changes.

Example workflow

1. Enter packaged dimensions, weight, price, cost, and category.
2. Calculate the fee waterfall and profit under the stated assumptions.
3. Recalculate after a packaging or price change and compare the difference.

Supported agents and setup

Review the source and bundled calculator script before running it locally. The published file references 2024 rate tables.

Account, API, and permission requirements

No API key is required. Local shell execution is needed for the bundled calculator script.

Limits and human review boundary

• The source file references 2024 rates and must be updated or checked against current Seller Central fees.
• Incorrect packaged dimensions or category assumptions can materially change the result.
• The calculation does not replace tax, customs, compliance, or accounting review.

Pair with Ecommerce Data API

Use product details and category APIs to prefill product attributes, then apply current fee tables outside the API response.