Amazon FBA Profit Calculator
Calculate exact Fulfillment by Amazon (FBA) fees based on product dimensions and weight. Determine net profit per unit.
Product Specs
Unit Profitability Breakdown
Margin Health Check
Is this product viable?
The 30% Rule
Ideally, cost should be 30%, Amazon Fees 30%, and Profit 30%. If fees > 40%, the product is risky.
The Red Bar (FBA Fee)
If this bar is huge relative to price, your item is too cheap or too bulky. Amazon rewards small, expensive items (e.g., supplements, jewelry).
Net Profit
This is your budget for Ads. If net profit is $5, you can't afford a CPA (Cost Per Acquisition) higher than $5.
Execution Steps
Enter Selling Price and Unit Cost.
Input Product Dimensions (Inches) and Weight (Lbs).
The tool determines your Size Tier (Standard vs Oversize) automatically.
View the breakdown of FBA Fees vs Referral Fees vs Profit to make sourcing decisions.
Pro Strategy
- Check if you are on the edge of a size tier. Reducing packaging by 0.1 inches could move you from Large Standard to Small Standard, saving $1+ per unit.
- Remember to account for PPC (Ads) in your net profit. This calculator shows Gross Margin before ads. Your 'True Net' is likely 10-20% lower.
- Use FBA Small & Light program for items under $10 and 10oz to reduce fees.
Core Concepts
Size Tiers
Amazon charges drastically more for 'Oversize' items. Shaving 0.5 inches off a package can sometimes save $2-3 per unit.
Dimensional Weight
If a package is large but light (like a pillow), Amazon charges based on volume, not actual weight. Formula: (L x W x H) / 139.
Referral Fee
The 15% commission Amazon takes for 'finding' the customer. This is separate from the shipping (FBA) fee.
What is Amazon FBA Profit Calculator?
This calculator replicates Amazon's rate card logic. It determines the product size tier based on the max side length, then applies the specific weight-handling fee for that tier. It's crucial for understanding the 'Unit Economics' of selling on Amazon.
Best For
- • Sourcing new products: Will this item be profitable?
- • Packaging design: Can I fold this box to fit a smaller tier?
- • Repricing: How low can I go before I lose money?
Limitations
- • Does not include Q4 holiday storage surcharges.
- • Does not include long-term storage fees (>365 days).
- • Simplified weight calculation (doesn't account for complex dim-weight edge cases).
Alternative Methods
FBM (Fulfillment by Merchant)
Shipping it yourself. Useful for heavy/bulky items where FBA fees are prohibitive.
SFP (Seller Fulfilled Prime)
Getting the Prime badge while shipping from your own warehouse.
Industry Applications
See how this methodology generates real revenue uplift in different sectors.
Packaging Optimization
Selling a kitchen utensil. FBA fees were $5.40/unit.
Realized the box was 0.5 inches too long for 'Small Standard'. Redesigned packaging to fold tighter.
Low Price Item
Selling a $9.99 cream. Fees ate 60% of revenue.
Switched to 'Small and Light' program and eventually created a 2-pack bundle for $18.99.
Oversize Trap
Yoga mat was rolling up to 25 inches long.
Changed to a foldable mat design to fit under 18 inches (Standard Size).