What is the FBA Profit Calculator?
An FBA profit calculator estimates your net profit per unit sold through Amazon's Fulfillment by Amazon program. It models every cost line — referral fee (usually 15%), FBA pick-pack fee (by size tier), monthly storage, ad spend, and your COGS — to show your true margin.
How to use the FBA Profit Calculator
- 1 Enter sale price, COGS, and inbound shipping per unit.
- 2 Pick your category referral % and FBA size tier.
- 3 Add your average monthly storage cost per unit.
- 4 Set your average ACoS and refund rate.
- 5 Read the Profit / Margin / ROI tiles — green is healthy, red is a money pit.
Benefits
- Models Amazon's 2026 fee structure including size-tier banding
- Includes PPC ACoS and refund rate in the margin math
- Live ROI and margin % update as you tweak inputs
- Free — no SKU upload, no account, no per-product limit
Common use cases
- → Validating a new product idea before sourcing
- → Setting the lowest acceptable Buy Box reprice floor
- → Quoting profit projections to a wholesale buyer
- → Comparing two SKUs to decide which to scale first