AI-assisted
Free Amazon FBA vs FBM Calculator
Compare Amazon FBA and FBM contribution profit using the same sales, product, advertising and return assumptions.
Free marketing tools
Free Ecommerce Business Tools
Model fulfillment, product pricing, margins and growth decisions for online commerce.
Available now
5 Free Tools
Each tool is clearly labelled by how it works: AI-powered, AI-assisted or browser-based.
Use free tool
AI-assisted
Free Amazon Multi-Channel Fulfillment Fee Calculator
Estimate Amazon Multi-Channel Fulfillment fees, product size tier and contribution margin from packaged dimensions, shipping speed, order quantity and selling price.
AI-assisted
Free Print-on-Demand Profit Calculator
Estimate print-on-demand profit, margin and break-even price after base product cost, marketplace fees, shipping, advertising and expected refunds.
AI-assisted
Free T-Shirt Pricing Calculator
Calculate a profitable retail price for custom T-shirts from blank and print costs, labor, selling fees, shipping, target margin and quantity discount.
AI-assisted
Free T-Shirt Profit Margin Calculator
Calculate profit per shirt, gross margin, markup and the selling price required to reach a target margin.
Ecommerce margins are thin, so small pricing and fulfillment choices decide whether a product makes money. These calculators expose the real unit economics before you commit.
Pick the right tool
Which Tool for Which Task
- Compare Amazon FBA vs FBM profitabilityAmazon FBA vs FBM Calculator
- Model Amazon Multi-Channel Fulfillment feesAmazon Multi-Channel Fulfillment Fee Calculator
- Check print-on-demand unit profitPrint-on-Demand Profit Calculator
- Price a t-shirt for a target marginT-Shirt Pricing Calculator
- Check a t-shirt profit marginT-Shirt Profit Margin Calculator
Do it in order
Recommended Workflow
- 1
Start from true unit cost
Include product, fulfillment, platform fees and returns, not just landed cost.
- 2
Price to a target margin
Decide the margin you need, then work back to the price rather than guessing.
- 3
Compare fulfillment options
FBA convenience versus FBM control changes the math per product. Run both.
- 4
Stress-test with returns and ad cost
A product that only works at zero returns and zero ad spend does not really work.
Start where you are
Beginner vs Advanced Tools
Know your numbers
Metrics That Matter
- Contribution margin
- Price minus all variable costs. What each sale actually adds before fixed costs.
- Fulfillment cost per unit
- Pick, pack and ship per item. The number that usually separates FBA and FBM.
- Break-even price
- The lowest price that still covers costs. Your discount floor.
- Return rate impact
- How returns erode margin. Often underestimated and quietly fatal.
Avoid these
Common Mistakes
- Pricing off product cost only and forgetting fees and returns.
- Assuming FBA always beats FBM without running the numbers per product.
- Ignoring storage fees on slow-moving inventory.
- Setting a promo price below break-even without realizing it.
Questions
Category FAQs
Are these ecommerce tools free?
Yes. Free with no sign up, and the optional AI recommendations are free too.
Is FBA always more profitable than FBM?
No. FBA saves you time but adds fees. For heavy, slow-moving or low-margin items, FBM can win. Run both in the calculator per product.
What margin should I target on print-on-demand?
High enough to survive returns and ad costs. Thin base margins vanish fast once you add promotion, so price with that buffer built in.
Do the calculators include Amazon fees?
The FBA and MCF tools model the relevant fulfillment and fee inputs. Always confirm against current Amazon rate cards, since fees change.
Do returns really change the math that much?
Yes. On thin margins, a modest return rate can erase profit, because you often lose the product, the shipping and the fees on a returned order.