Free Amazon seller calculators

Work out real net profit, margin and ROI per unit after every Amazon fee, shipping, advertising and returns.

Return on investment for an Amazon product: profit divided by the cash you put in.

Net margin: profit as a share of the selling price.

Compare profit per unit fulfilling through Amazon (FBA) versus shipping it yourself (FBM).

Profit, ROI and margin on a store-bought item after sales tax, prep, inbound shipping and every Amazon fee.

Profit on items bought from other websites: buy price, tax, shipping to you, cashback, prep and Amazon fees.

Per-unit and whole-order profit from a wholesale price list: case quantity, freight per case and MOQ.

Launch-phase versus steady-state profit for a private label product, with photography and design amortized over the first units.

Profit on a multi-item bundle from its component costs, packaging, labor and one set of Amazon fees.

Compare profit per unit selling singles versus a pack of N, with fees recalculated for each.

Profit with and without an Amazon coupon, including the per-redemption coupon fee and the sales lift needed to justify it.

What a price cut does to profit: new price, referral fee change, profit drop and the extra units needed to compensate.

Total profit over a promotion period at a promo price with an expected unit lift, versus the baseline.

How profit and margin change at 1%, 3%, 5%, 10%, 15% and 20% return rates, and the return rate at which profit hits zero.

Profit when the supplier quotes in one currency and you sell in another, with a static exchange rate, manual override and a ±10% rate sensitivity.

Amazon's referral fee by category and price, including minimums and tiered categories.

Estimate the FBA fulfillment fee, size tier, storage and referral fee from weight and dimensions.

Lowest selling price before profit reaches zero, plus the price needed for a target margin or ROI.

The highest ACoS you can run before advertising eats all the profit.

ACoS to aim for given your pre-ad margin and the margin you want to keep.

Total advertising cost of sales: ad spend as a share of ALL revenue, organic included.

Return on ad spend: sales earned per dollar of advertising, with the break-even ROAS for your margin.

Cost per click and click-through rate from spend, clicks and impressions.

Cost per order (acquisition) from ad spend and orders, compared with the profit each order earns.

Orders divided by clicks or sessions, benchmarked against typical Amazon conversion rates.

The most you can bid per click from price, conversion rate and your ACoS ceiling.

Profit per order after advertising, with ACoS, TACoS and net margin for a campaign period.

Clicks and budget needed to hit a sales or unit target from conversion rate and CPC.

How many units and how much revenue a given ad spend must produce just to pay for itself.

A suggested bid from average order value, conversion rate and target ACoS, with the direction to move your current bid. A recommendation, not a guarantee.

The most you can pay a supplier per unit and still hit your ROI and margin targets.

True cost per unit after freight, duty, customs, inspection, packaging, prep and warehouse fees.

What a supplier's minimum order really means: cash needed, months of stock, potential revenue and risk.

Landed cost per unit for an imported order: goods, shipping, tariff %, customs fees, insurance and handling.

Spread a shipment cost across products equally, by units, by weight or by value.

Per-unit logistics cost of a container or sea shipment from freight, customs, insurance, inspection and destination fees.

Total cash to bring a product to market and the fully loaded cost per unit, including samples, photography and launch ads.

Units you must sell per month and per day to hit a revenue target.

Units and revenue required to reach a monthly profit target.

Month-by-month units, revenue and profit with optional growth.

Twelve-month projection with seasonality multipliers (Q4 peaks, summer dips).

Cash you need to fund inventory plus months of ads and operating costs.

Days between paying your supplier and getting paid by Amazon.

Units you must sell to recover a fixed cost or investment.

Rough valuation range for an Amazon business from trailing profit and risk factors. An estimate, not an appraisal.

How much of your revenue depends on one or a few SKUs.

Cash locked in stock on hand and on order, days of cover, and the aged portion.

The stock level at which you must place the next order.

How many units the next order should be to cover a chosen number of days.

Buffer stock for demand spikes and late shipments: simple, statistical or max-demand method.

How many days current stock lasts, and the stockout date.

The date you will run out of stock at the current sales rate.

How many times a year inventory converts to sales, and days to sell through.

Total cash for an inventory order including prep, inbound shipping and storage, with potential return.

Total lead time from order to stock landing at Amazon, and the date you must order by.

Monthly and total FBA storage cost for a quantity of units, from dimensions or a per-unit rate.

Amazon's aged-inventory surcharge for units sitting past 181 days, by age band.

Total startup investment for a new Amazon product: inventory, shipping, packaging, inspection, samples, creative, PPC and extras.

Units, revenue and months needed to recover your startup investment at your profit per unit and sales velocity.

How many units to order first: enough to cover lead time, safety stock and your target months of cover, or the MOQ if higher.

Cash to keep aside for advertising, fixed costs and the next reorder over your runway, plus a safety buffer.