Free Amazon Seller Tools
Calculate fees, estimate profits, and check your Buy Box status — no account required.
FBA Fee Calculator
Calculate Amazon referral fees, FBA fulfillment fees, storage costs, and your true net profit per unit.
Profit Calculator
Enter your buy price, sell price, and costs to instantly see your profit per unit, ROI, and break-even price.
Buy Box Checker
See who owns the Buy Box on any ASIN, track rotation history, and understand your competitive position.