Bring your real costs.
Enter supplier quotes, packaging, shipping and selling fees. Count each cost once.
THE NUMBERS BEHIND YOUR NEXT PRODUCT
Marketplace profit.
Clearer numbers.
Better decisions.
A free product profit calculator for Amazon, Walmart and Etsy sellers. Enter your costs and marketplace fees to estimate your margin, then use the downloadable toolkit to plan pricing, advertising and inventory.
Editable assumptions • Instant results • Plain-language answers
YOUR PRODUCT, AT A GLANCEEXAMPLEContribution per unit
$4.74 / unit
From a $12.99 selling price
Estimated variable costs36.5% margin
Monthly sales300 units
Monthly overhead$100
Monthly operating profit$1,322.45
Illustrative shampoo-bar scenario. Your results depend on the costs you enter.
Make your next move with the math.
01 / KNOW YOUR MARGIN
See what each sale leaves you.
02 / WORK BACKWARD
Find your manufacturing budget.
03 / PLAN THE FIRST RUN
Estimate the cash you need.
THE FREE UNIT PROFIT CALCULATOR
Free marketplace profit calculator
Start with the example, then replace it with your own numbers.
A note on the example. The $12.99 shampoo bar and selling fees are illustrative. Enter actual costs and fees for your marketplace. Amounts are in USD.
Your assumptions
EDIT THE NUMBERS BELOWFROM GUESSWORK TO A PLAN
Three steps to a clearer decision.
Test the possibilities.
Try lower sales, higher ad costs or a new price. See how your margin responds.
Know your next move.
Compare the manufacturing budget with your quote and estimate your first-run funding.
DON’T WAIT FOR THE LAST UNIT
Plan ahead for marketplace stockouts.
Know when to reorder, how much to buy and what cash to set aside. SKUHarbor’s Reorder & Inventory Planner brings sales pace, supplier lead time and incoming stock into one clear plan.
Get the full toolkit — $39.99Included in the one-time toolkit. Checkout is coming soon.
ILLUSTRATIVE INVENTORY CHECK25 days of stock.
25 days of stock.
35 days to replenish.
A warning to act before your shelf is empty.
- Stockout timing warnings
- Reorder trigger & suggested quantity
- Incoming shipment timing
- Estimated reorder cash
Planning estimates help you spot risks; they do not guarantee stockout prevention or marketplace ranking.
KNOW YOUR ADVERTISING LIMITS
How much can you spend to win a sale?
Turn product costs and conversion assumptions into break-even ACOS, ROAS and click-cost limits. Then choose a profit target to see what advertising budget leaves you a cushion.
Explore the $39.99 toolkitOne-time purchase. No subscription fees. Checkout coming soon.
ADVERTISING + BUNDLE PLANNING
- See contribution before advertising
- Calculate target-profit ad limits
- Test two-packs and multipacks
- Compare bundles with separate sales
Estimates depend on your inputs. Click-cost limits assume steady conversion; they are not guaranteed bids or platform recommendations.
START WITH A QUICK CHECK. GO FURTHER WITH THE TOOLKIT.
Choose the tools for your next move.
Check one product’s unit profit for free, or get the complete toolkit to compare products, plan inventory and test your pricing.
A quick profit check.
$0 free to use
Use the basic calculator right here on the website.
Use the free calculatorIncluded
- Editable selling price and variable costs
- Contribution per unit
- Contribution margin percentage
- Instant results for one product at a time
For a quick unit-profit estimate. Downloadable tools, saved projects, comparisons and planning features are included in the paid toolkit.
Your complete planning kit.
$39.99 one-time payment
No subscription fees.
Download once. Keep the browser calculator and Excel workbook.
Get the toolkit — $39.99Secure checkout and digital download delivery through Lemon Squeezy.
14-day full-refund policy, even after downloading. Purchase terms · Refund policy · Privacy notice
Everything in Free, plus
- Offline browser calculator + Excel workbook
- Save and reopen browser projects
- Compare up to five products
- Low, expected and high sales scenarios
- Monthly operating profit and overhead break-even
- Target-profit manufacturing budget
- First-run funding and wholesale estimates
- Price targets and discount planner
- Advertising break-even ACOS, ROAS & CPC limits
- Bundle and multipack profit comparison
- Reorder planner with stockout timing warnings
- Amazon, Walmart and Etsy fee guide
- Plain-language result explanations and quick start
Permanent download. Fee guide is a dated reference with official links. Browser and Excel files work independently.
PRACTICAL SELLER GUIDES
Understand your profit, ads and inventory.
Learn the numbers before you place your next order.
Amazon profit calculator: what each sale leaves you
An Amazon selling price is only the starting point.
Etsy profit calculator: price your products with confidence
For an Etsy seller, materials are only part of the cost.
Walmart Marketplace profit calculator
Before listing or reordering a product on Walmart Marketplace, check whether the selling price covers the costs of supplying and delivering it.
Break-even ACOS: find your advertising limit
Break-even ACOS estimates how much ad-attributed revenue you can spend on advertising before product contribution reaches zero.
Inventory reorder point: order before stock runs out
A reorder point tells you when to place the next order.
A few useful answers.
Does SKUHarbor connect to Amazon or other marketplaces?
This version uses manual inputs. Enter the fees that apply to your product and selling channel; the example is not a current marketplace fee quote.
Is this bookkeeping or tax software?
It is a product planning calculator. It does not maintain accounts or calculate tax.
How should I enter advertising costs?
Divide total advertising spend by all units sold, including organic sales. Enter that dollar amount per unit; do not enter an ACOS percentage.
Is there a subscription?
The SKUHarbor Toolkit is $39.99 as a one-time download. No subscription fees. Review our purchase terms and refund policy before buying.