FBA Calculator by 3PLGuys
Know your real Amazon FBA fees and profit before you sell
What it does
Most FBA calculators are outdated, gated behind email walls, or built to upsell you software. Ours is different: current 2026 Amazon fee data (fulfillment, storage, referral, inbound placement, low-inventory fees), instant results with real profit and margin breakdowns, and zero signup no email gate, no trial, no catch. It's built by 3PLGuys, an Amazon SPN-certified prep center that handles FBA inventory every day, so the fee logic reflects what sellers actually pay, not a simplified estimate.
Calculate your freight class from dimensions and weight using the current NMFC 13-sub density scale (effective July 19, 2025). Full freight class chart 50–500, NMFC code explainer, and reclassification fee guide. Free, no login.
Enter your pallet dimensions and weight — get your shipment density and estimated NMFC freight class on the current 13-sub density scale that took effect July 19, 2025. Plus the full class chart, NMFC code explainer, and what actually happens when a carrier reclassifies you. Measure the finished handling unit — pallet, crate, or carton — at its longest, widest, and tallest points, including the pallet itself, overhang, and packaging. Carriers measure the same way, with laser dimensioners. So close: 0.63 pcf more density puts you at class 92.5 . Shrinking the cube — shorter pallet, tighter stacking, no overhang — often gets you there. Density-based estimate. Commodity-specific NMFC listings,…from 3plguys.com
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