Calculator content review
Current scope and review date
Last updated: June 11, 2026
Inputs, explanations, and examples are reviewed for seller planning. Platform-specific charges remain editable because actual terms vary by account, country, currency, category, and transaction.
What is this calculator?
An Amazon FBA profit calculator estimates whether a Fulfillment by Amazon product leaves a viable profit after the marketplace and fulfillment process are paid. FBA can simplify delivery and customer service, but the selling price must support referral fees, fulfillment charges, inventory acquisition, shipping into Amazon, storage, and promotion.
The calculator models a set of units sold, while most cost entries are averages for one unit. That makes the output useful for product research and for reviewing an existing SKU over a week or month. It reports total profit together with profit per unit, margin, and ROI, because an attractive sales total does not automatically indicate an attractive product.
This is especially useful for private-label, wholesale, and small catalog sellers who need to compare a product before reordering. A change in package dimensions, size tier, referral category, inbound freight, storage, or Sponsored Products spend can make the same selling price produce a very different result.
Who should use it?
Amazon FBA sellers can use this model while researching a possible product, choosing a reorder quantity, or reviewing an established SKU after advertising costs change. It is designed for sellers who can provide category, size-tier, landed-cost, storage, and promotion assumptions for the product being evaluated.
What decisions does this calculator support?
- Whether an FBA SKU supports enough per-unit profit, margin, and ROI after referral, fulfillment, landed inventory, storage, inbound freight, and advertising costs.
- Whether a supplier quote, packaging change, size tier, price adjustment, or higher PPC cost improves or weakens the product economics.
- Whether a seller should launch, reorder, reduce exposure, or investigate a cost line before committing additional working capital.
Input field guide
Selling price and units sold
Use the expected price after coupons and promotions, then enter units for the same period represented by ad and storage assumptions.
Product and inbound cost
Product cost should be landed per unit. Add freight, duty, inspection, labels, and preparation where they are not already included.
Referral and fulfillment fees
Use the current category percentage and SKU-specific FBA amount for the correct marketplace, dimensions, weight, and size tier.
Storage and advertising
Convert storage and PPC into realistic per-unit averages. Model launch and mature advertising separately when their costs differ materially.
Other cost
Use this field for a per-unit allowance such as returns, removals, coupons, prep, or other costs not represented elsewhere.
How to calculate it
Multiply item price by units sold to establish revenue. Apply the referral percentage to revenue. Multiply fulfillment fee and other unit-level costs by units sold, including product purchase cost, storage, inbound shipping, ads, and miscellaneous costs. Subtract their sum from revenue.
Profit per unit makes it easier to compare products at different prices. Margin measures profit as a share of revenue, while ROI compares profit with costs committed. Fee schedules and size tiers can change, so the accuracy of this forecast depends on entering the correct fulfillment and referral assumptions for the specific SKU.
Calculator method
Formula
- Revenue = Selling price x Units sold
- Referral fees = Revenue x Referral fee percentage
- FBA fees = Fulfillment fee per unit x Units sold
- Total costs = Referral fees + FBA fees + (Product, storage, inbound shipping, ad, and other cost per unit x Units sold)
- Net profit = Revenue - Total costs
- Profit per unit = Net profit / Units sold
- Profit margin = Net profit / Revenue x 100
- ROI = Net profit / Total costs x 100
How this estimate is prepared
This page explains the formula behind Amazon FBA Profit Calculator before asking for inputs, so sellers can review what each field changes and spot assumptions that do not match their own store records.
Marketplace and payment fees can change by country, account type, category, currency, and platform policy. Treat the result as a planning estimate, then compare important decisions against your current invoices, dashboard reports, and official fee schedules.
Learn more about how Ecom Profit Tools writes and reviews calculator content in the editorial policy.
Updated for 2026
Planning scope and fee assumptions
Last reviewed: June 2026
This Amazon FBA profit calculator is designed for planning and educational use. It estimates referral fees, fulfillment, storage, inbound shipping, PPC impact, profit, margin, ROI, and break-even considerations for a SKU. Actual charges vary by category, dimensions, weight, marketplace, inventory age, and program, so verify final fees in Seller Central before inventory or pricing decisions.
Included in this estimate
- Selling price, units sold, referral fee percentage, fulfillment fee per unit, product cost, storage, inbound shipping, ad cost, and other unit allowances.
- Total net profit, per-unit profit, margin, and ROI for the modeled quantity.
- Separate cost lines so sellers can test category, size-tier, ad, and landed-cost changes independently.
Not automatically included
- Automatic Amazon category lookup, product-size tier lookup, monthly storage changes, returns, removals, disposal, reimbursements, and aged inventory surcharges.
- Selling plan fees, coupons, Lightning Deals, Subscribe & Save, multi-channel fulfillment, and brand registry costs.
- Inventory cash-flow timing, long-term holding risk, tax treatment, and financing costs.
Scenario checks worth running
- Run one scenario using launch PPC cost and another using mature average PPC cost from real campaign reports.
- Test a price decrease, referral fee tier change, or FBA fulfillment fee increase before reordering.
- Compare profit per unit against required return on cash tied up in inventory.
When to update inputs
- Update referral fee and fulfillment fee after category, dimensions, weight, marketplace, or Amazon fee schedule changes.
- Update ad cost per unit from actual Sponsored Products or total advertising reports.
- Refresh storage and inbound shipping inputs before each reorder or seasonal inventory period.
Official references to verify
Example calculation
A product selling for $34.99 over 100 units produces $3,499 revenue. If product cost is $9, referral fee is 15%, fulfillment is $5, storage is $0.35, inbound shipping is $0.80, ads are $4, and other cost is $0.30 per unit, total cost is $2,469.85. Net profit is $1,029.15 or $10.29 per unit, with a 29.41% margin.
How to interpret the results
Profit per unit
Use this to compare SKUs and supplier scenarios. A small positive amount may not provide enough room for returns, storage changes, or price competition.
Profit margin
Margin shows resilience relative to sales. Stress-test a lower price, higher PPC cost, and higher fulfillment fee before relying on the base result.
ROI
ROI helps compare the return on costs entered, but it does not show inventory age, payment timing, or how long cash remains tied up.
Why the result matters
Amazon sellers can encounter a product that appears profitable in sourcing research but underperforms after fulfillment and ad spend are included. Before ordering inventory, test changes in sale price, landed cost, conversion advertising expense, and fee tier. A narrow margin may not provide room for returns, coupons, or storage increases.
For operating products, update the calculator with actual average ad cost and inventory expense rather than relying on a launch estimate. It can support reorder decisions and identify which cost reduction has the greatest value. It remains an educational estimator; reconcile decisions against Seller Central reports and professional tax or accounting guidance where needed.
A useful scenario is comparing a current SKU against a new packaging or supplier quote. If the new option reduces product cost but increases fulfillment size, storage, or inbound freight, the per-unit profit line helps reveal whether the change is actually beneficial.
How to use it
Enter a selling price, estimated units, and your product landed costs expressed per unit.
Add the referral percentage and current FBA fulfillment amount for the product's category and size tier.
Include per-unit storage, inbound shipping, advertising, and other operating allowances.
Test different scenarios and use per-unit profit, margin, and ROI when evaluating inventory decisions.
For cross-channel planning, compare assumptions with the Shopify Profit Calculator and Etsy Fee Calculator, then validate ad efficiency targets with the ROAS Calculator and Break Even Calculator.
Common mistakes to avoid
- Using a fulfillment amount from the wrong size tier, weight, category, or marketplace.
- Omitting inbound freight, storage, advertising, returns, or other unit-level allowances.
- Reading revenue after one Amazon fee as final profit before inventory and fulfillment expense.
- Averaging all SKUs together instead of modeling the specific product size, category, unit cost, and ad cost being reviewed.
Frequently asked questions
Are all cost inputs per unit?+
Selling price and every non-percentage cost field in this calculator are modeled per unit. Enter average per-unit advertising or storage cost when reviewing multiple units.
Does this find Amazon fees automatically?+
No. Referral and fulfillment charges depend on category, size tier, weight, program, and policy changes. Enter rates and charges from your current seller information.
What is not covered in this estimate?+
Possible removals, returns, aged inventory surcharges, promotions, taxes, reimbursements, account subscription fees, and currency effects should be separately considered where relevant.
Need more tools for seller decisions? See the full set in Free Ecommerce Calculators.
Related calculators
Compare Amazon scenarios with Shopify Profit Calculator, Etsy Fee Calculator, ROAS Calculator, and Break Even Calculator for broader pricing and campaign decisions.
Business Fundamentals
Profit Margin Calculator
Turn revenue and cost into gross profit, profit margin, and markup for fast pricing analysis.
Use calculatorPerformance
ROI Calculator
Measure net return and return on investment for inventory, software, promotions, or business projects.
Use calculatorAdvertising
ROAS Calculator
Calculate return on ad spend and revenue after advertising cost for ecommerce campaign review.
Use calculatorDisclaimer
This independent calculator is for educational planning and is not affiliated with Amazon or a substitute for Seller Central reports. Referral, FBA, storage, inbound, advertising, return, and other charges vary by SKU, marketplace, program, and date. Verify material decisions with current Amazon tools and account data.
Read the site-wide calculator methodology for formula, source, review, and limitation details.