Summary
This calculates Amazon FBA fees and profit margins based on product dimensions, weight, and pricing. It automatically classifies items into the correct 2024 size tier (small standard through special oversize), breaks down fulfillment fees, storage costs, and referral fees by category, then shows you gross margin, net margin, and ROI. The optimization tips are helpful if you're trying to shave costs by tweaking packaging dimensions or managing inventory aging. It's straightforward if you're sourcing products and need to know whether the unit economics actually work before committing to inventory. Supports both JSON input and interactive mode, with Chinese language output available.
Install to Claude Code
npx -y skills add nexscope-ai/amazon-skills --skill amazon-fba-calculator --agent claude-codeInstalls into .claude/skills of the current project.
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Files
SKILL.mdView on GitHub
Amazon FBA Calculator (Lite)
Precise FBA fee calculation based on product dimensions and weight.
Features
- Size Tier Detection - Automatic classification
- FBA Fulfillment Fee - 2024 rates
- Monthly Storage Fee - Standard & Peak season
- Long-term Storage Fee - 271+ days aging
- Referral Fee - By category
- Profit Analysis - Gross/Net margin, ROI
- Optimization Tips - Size, weight, inventory
Size Tiers (2024)
| Tier | Max Weight | Max Dimensions |
|---|---|---|
| Small Standard | 1 lb | 15"×12"×0.75" |
| Large Standard | 20 lb | 18"×14"×8" |
| Small Oversize | 70 lb | 60"×30" |
| Medium Oversize | 150 lb | L+Girth ≤108" |
| Large Oversize | 150 lb | L+Girth ≤165" |
| Special Oversize | >150 lb | >165" |
Input
{
"length": 10.0,
"width": 6.0,
"height": 3.0,
"weight": 1.2,
"selling_price": 29.99,
"product_cost": 8.00,
"inbound_shipping_cost": 1.50,
"category": "kitchen"
}
Output
- Size tier classification
- Fee breakdown table
- Profit metrics (margin, ROI)
- Optimization suggestions
Usage
python3 scripts/calculator.py
python3 scripts/calculator.py '{"length": 10, "width": 6, ...}' --zh
Version 1.0.0 | Platform: Amazon | Variant: Lite
Part of Nexscope AI — AI tools for e-commerce sellers.
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Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →First SeenJun 3, 2026
