Amazon Seller FBA Calculator (INR)
Product Information
Profit Calculation Results
Profit Breakdown
Example Calculations (INR)
Example 1: Electronics Product
Example 2: Clothing Product
Amazon Seller FBA Calculator
The FBA decision most sellers actually need to make isn't "what price should I charge" — it's "should I buy this inventory at all." Before money goes into a supplier's account for a few hundred units, it's worth knowing whether the product clears a profitable margin once Amazon's fulfillment fees, storage costs, and referral commission are all subtracted. This calculator is built around that pre-purchase decision, not just a price check on something already listed.
What FBA Actually Costs You, Beyond the Obvious Fee
Fulfillment by Amazon isn't one fee — it's a bundle of them, and that's exactly where new sellers underestimate cost. Beyond the category-based referral fee, there's a pick-and-pack fulfillment charge tied to product weight and size, inbound shipping to get inventory into a fulfillment center in the first place, and a monthly storage fee for however long that inventory sits on a shelf before selling. A slow-moving product doesn't just tie up cash — it actively costs money every month it doesn't sell, in a way a self-fulfilled listing doesn't.
Running the Numbers
- Product category and subcategory — sets the referral fee percentage.
- Sourcing or manufacturing cost per unit.
- Target selling price — what you expect the market to actually pay, not just your cost plus a margin.
- Product weight and dimensions — these drive the fulfillment fee more directly than most sellers expect.
- Inbound shipping cost — getting inventory from your supplier or warehouse to Amazon's fulfillment center.
- Expected monthly sales volume — used to project total monthly profit and to estimate how long inventory will realistically sit before it sells.
The output separates referral fee, fulfillment fee, estimated storage cost, and net profit — plus ROI, which is a genuinely different number from margin and worth understanding on its own.
A Worked Example
Say you're evaluating wireless headphones sourced at ₹1,500 a unit, with a target Amazon India price of ₹2,999 based on competitor research. The gap looks like roughly ₹1,500 in profit at first glance. Once the category referral fee, a weight-based fulfillment charge, inbound shipping to the fulfillment center, and a month or two of storage cost are all factored in, the real number is typically well below that first impression — sometimes enough to turn what looked like a strong opportunity into a marginal one, which is precisely the kind of gap you want to find before placing a bulk order, not after.
The Storage Fee Trap
Storage fees are charged monthly and scale with how much space your inventory occupies — and they don't stay flat. Fees typically increase during peak shopping months, and inventory that's been sitting for an extended period can trigger additional long-term storage charges on top of the standard monthly rate. A product with a thin margin to begin with can turn unprofitable purely by sitting unsold through a slow season, which is why sales-velocity assumptions matter as much as the per-unit profit calculation — a product that sells fast at a smaller margin often outperforms one with a bigger margin that moves slowly and quietly accumulates storage charges.
Margin vs. ROI — Two Different Questions
Profit margin (profit as a percentage of selling price) tells you how much of each sale you keep. Return on investment (profit as a percentage of what you spent to source and land the product) tells you how hard your capital is working. A product can have a modest margin but an excellent ROI if the sourcing cost is low relative to the price — which matters enormously when you're deciding between two products competing for the same limited inventory budget, rather than just deciding whether to sell one product at all.
Frequently Asked Questions
Can I use this if I'm doing FBM (Fulfillment by Merchant) instead of FBA?
You can, but swap out the FBA fulfillment and storage fee inputs for your own shipping and warehousing costs — the referral fee and GST portions still apply the same way regardless of who handles fulfillment.
Why does the calculator ask about expected monthly sales volume if I'm just checking one product's margin?
Because storage cost isn't a one-time charge — it accrues for as long as inventory sits unsold. A realistic sales-velocity estimate is what turns a per-unit profit number into an honest picture of total profitability over the life of that inventory batch.
What's the practical difference between margin and ROI for deciding what to source?
Margin tells you how profitable each sale is. ROI tells you how efficiently your sourcing budget is being used. When you're choosing between multiple product opportunities with a fixed amount of capital to spend, ROI is usually the more useful number for deciding where that money goes.
Do long-term storage fees apply to every product?
They apply specifically to inventory that remains in a fulfillment center beyond a certain period, on top of standard monthly storage charges — which is exactly why slow-moving stock quietly erodes margins that looked fine on paper at launch.
Is my sourcing cost and pricing data kept private?
Yes — all calculations run locally in your browser, so none of your cost or margin data is transmitted or stored elsewhere.