FBA Calcs is a free calculator suite for Amazon sellers. Enter a product's dimensions, weight and selling price and it returns the referral fee, FBA fulfilment fee, prep cost and net profit, using the 2026 US rate card.
Key features:
- Profit and fee calculator: referral fee tiers, FBA size tiers, inbound placement, prep and freight
- Prep cost calculator: polybagging, labelling, bundling and inspection cost per unit
- Sourcing scorecard: scores a product on margin, competition and seasonality before you commit
- Multi-marketplace support: 10 marketplaces and 4 languages
Most FBA calculators ignore prep, inbound placement and freight, so your margin looks better than it is. FBA Calcs shows your true landed cost per unit and real net profit. Everything runs in the browser: no sign-up, no API keys, no credit card.
