How to Use This FBA Calculator
Pick your marketplace tab (US, UK, or India) — inputs reset to realistic defaults for that region. Dimensions switch automatically: inches and pounds for the US marketplace; centimetres and kilograms for UK and India. Choose the category closest to your product for referral rate and minimum fee, then enter selling price and landed COGS. Length, width, height, and weight drive automatic size-tier detection and dimensional (volumetric) weight, which Amazon compares to actual weight to set billable shipping weight for fulfillment fees.
Optionally model average days in storage (blended monthly rate) and toggle PPC as a percentage of price. Use monthly units for a simple revenue and net-profit projection at scale — all totals update live. The maths underneath is simple: Net profit = Selling price − Referral − FBA − Storage − PPC − COGS. Margin % is net ÷ price × 100; ROI % is net ÷ COGS × 100. Aim for both — healthy margin protects against fee-change risk, while ROI tells you whether the capital trapped in inventory is working hard enough. As a rule of thumb, target at least 20% net margin before PPC; below 15% there is rarely enough room for advertising, returns, and fee increases.
Amazon FBA Fee Calculator USA
The US tab works in dollars, inches, and pounds. Dimensional weight is length × width × height ÷ 139, and Amazon bills the higher of dimensional and actual weight. The smallest standard-band unit that clears the Small Standard envelope (compact dimensions and shipping weight ≤ 0.75 lb) lands at the landmark $3.22 fulfillment fee referenced in Seller Central tier tables — a useful anchor when designing packaging. Larger parcels graduate to Large Standard bands starting near $4.75, scaling with billable weight, then step up into Large Bulky (from about $9.73 plus per-lb increments) and Extra-Large matrices (from about $26.33+ depending on shipment weight).
Referral fees on the US marketplace are category-specific: most categories run at 15% of the selling price, electronics at 8%, personal computers at 6%, automotive at 12%, and beauty & health at 17%, each against a $0.30 minimum per item. The calculator applies the correct percentage-versus-minimum logic for the category you select, so a low-priced item never slips under the minimum unnoticed. Storage is modelled per unit from cubic volume × a blended monthly rate (~$1.63 per cubic foot, illustrative) × (average days ÷ 30) — always confirm live seasonal and aged-inventory rates inside Seller Central before locking in purchase orders.
FBA Calculator UK
The UK tab calculates in pounds sterling with centimetres and kilograms, using the ÷ 5000 dimensional divisor. Amazon UK splits its fulfillment ladder into envelope and parcel bands: Small Envelope (≤ 100 g) at £1.71, Standard Envelope (≤ 460 g) at £2.23, Large Envelope (≤ 900 g) at £2.74, Small Parcel at £3.00, then Standard Parcel from £3.74, Large Parcel from £5.21, and an Extra-Large formula from £10.19 plus per-kg increments. Because envelope bands are so much cheaper than parcel bands, UK sellers gain more from packaging compression than sellers in almost any other marketplace — shaving millimetres off a soft product can drop it a full band.
UK referral fees follow the familiar pattern — most categories 15%, electronics, cameras, and personal computers 7% — against a £0.25 minimum. Storage is modelled at a blended ~£0.73 per cubic foot equivalent (illustrative). Note that VAT treatment on fees and settlement differs from the US; the calculator's outputs are pre-VAT simplifications, so validate your shortlist against the live fee preview in Seller Central UK.
FBA Calculator India
The India tab works in rupees with centimetres and kilograms and the same ÷ 5000 dimensional divisor. Amazon India's fulfillment ladder runs Standard 0–500 g at ₹27, Standard 500 g–1 kg at ₹37, Standard 1–2 kg from ₹57, then Advanced 0–5 kg from ₹76, Advanced 5–12 kg from ₹115, and Heavy & Bulky from ₹195 with per-kg increments. Referral rates diverge sharply from Western marketplaces: most categories sit near 9%, electronics at 7%, mobile phones at just 4%, while clothing and books run 15% and jewellery 20%, each against a ₹5 minimum.
That referral structure changes what is profitable: categories that are margin-thin in the US (like electronics accessories) can clear healthy margins in India, while jewellery needs a much larger gross margin to absorb its 20% referral rate. Storage is modelled at a blended ~₹30 per cubic foot equivalent (illustrative); GST treatment is not modelled, so confirm final numbers in Seller Central India before committing stock.
What Fees Does the FBA Calculator Include?
The calculator models the four costs that decide FBA profitability: the referral fee (category percentage of selling price versus the marketplace minimum — whichever is higher), the FBA fulfillment fee (derived from automated size-tier detection and billable weight, the greater of dimensional or actual weight), monthly storage (cubic volume × blended monthly rate × average days ÷ 30), and optional PPC spend as a percentage of price. Here is how the three marketplaces compare:
| Factor | US | UK | India |
|---|---|---|---|
| Currency | USD ($) | GBP (£) | INR (₹) |
| Dim / weight units | in / lb | cm / kg | cm / kg |
| Dimensional divisor | 139 | 5000 | 5000 |
| Referral anchors | Often 15% / elec 8% / PCs 6% | Often 15% / elec 7% | Often 9% / phones 4% / jewels 20% |
| FBA fee ladder | Standard → bulky → XL $ bands | Envelope → parcel → XL £ bands | Standard → advanced → bulky ₹ bands |
| Blended storage (/ cu ft eq) | ~$1.63 illustrative | ~£0.73 illustrative | ~₹30 illustrative |
What it deliberately does not include: VAT/GST settlement treatment, peak-season and aged-inventory storage surcharges, low-inventory-level fees, removal and disposal fees, and lightning deal costs. These vary by locale and by month — numeric examples in this calculator are educational simplifications, so validate against your live fee preview in Seller Central before sourcing.
How FBA Reimbursements Affect Your Real Profit
Modelling fees protects margin going forward — but most sellers are also losing money backwards, to overcharged FBA fees, lost and damaged inventory, and return discrepancies Amazon never reimburses automatically. The dimensional-weight mechanics this calculator exposes are also one of the most common sources of fee overcharges: when Amazon's recorded dimensions for your SKU are larger than physical reality, you slip a tier up the ladder and silently overpay $3–$5+ per unit on every order until someone catches it. Correcting the record stops the bleed going forward and recovers past overcharges.
Leviathan Sellers audits Seller Central for exactly these discrepancies daily as part of our FBA reconciliation and reimbursement recovery service — filing each claim manually, with manufacturing-cost documentation, inside Amazon's 60-day window. To understand how recovery works end to end, read how to recover Amazon FBA reimbursements in 2026 and our breakdown of the 2026 Amazon FBA reimbursement policy changes. When you want the exact number for your account, request a free audit.
FBA Calculator FAQs
Is the FBA calculator free?
Yes — this Amazon FBA calculator is completely free with no login, no signup, and no usage limits. Everything runs instantly in your browser: enter your price, cost, dimensions, and weight, and the calculator returns referral fees, FBA fulfillment fees, storage cost, net profit, margin, and ROI in real time.
How do I use the FBA calculator?
Pick your marketplace tab (US, UK, or India), choose the category closest to your product, then enter selling price, landed product cost, dimensions, and weight. The calculator automatically detects your size tier, computes dimensional weight, and applies the correct referral rate. Optionally add average days in storage, PPC as a percentage of price, and monthly units for a full profit projection.
Does this FBA calculator work for Amazon USA?
Yes. The USA tab calculates in USD using inches and pounds, with dimensional weight at length × width × height ÷ 139. It auto-detects US size tiers — Small Standard from $3.22, Large Standard from $4.75, Large Bulky from $9.73, and Extra-Large from $26.33 — and applies US referral rates such as 15% for most categories, 8% for electronics, 6% for personal computers, and 17% for beauty.
Does this FBA calculator support Amazon UK and India?
Yes. Switch between Amazon US (USD), Amazon UK (GBP), and Amazon India (INR) using the marketplace tabs. Each uses its own 2025–2026 fee schedule, size tier thresholds, dimension units (inches for US, centimetres for UK and India), referral rates, and currency.
What fees does the FBA fee calculator include?
It includes the four costs that decide FBA profitability: the referral fee (category percentage of selling price versus the marketplace minimum), the FBA fulfillment fee (from auto-detected size tier and billable weight), monthly storage cost (cubic volume × blended rate × days stored), and optional PPC spend as a percentage of price. It does not model VAT/GST settlement, peak-season or aged-inventory surcharges, or removal fees — confirm those in Seller Central before finalising a purchase order.
How is this different from Amazon's revenue calculator?
Amazon's official Revenue Calculator is accurate but requires you to look up one ASIN at a time, per marketplace. This calculator needs no login and no ASIN: you can stress-test a product idea before it exists on Amazon, switch instantly between US, UK, and India fee schedules, and model PPC spend and monthly projections that Amazon's tool does not include. Use this one to shortlist products fast, then validate the finalists against Amazon's live fee preview.
How does Amazon calculate FBA fulfillment fees?
FBA fees are based on size tier and billable weight — whichever is higher between actual weight and dimensional weight (length × width × height ÷ 139 for US in inches; ÷ 5000 for UK and India in cm). Size tiers range from Small Standard ($3.22) through Large Standard, Large Bulky ($9.73+) and Extra-Large ($26.33+) for US. This calculator detects your tier automatically.
What profit margin should Amazon FBA sellers target?
Target at least 20% net margin after all fees and product cost, before PPC spend. Margins below 15% leave insufficient room for advertising, returns, and fee changes. Use the PPC toggle in this calculator to model your ad spend impact.