What is a free ecommerce profit calculator?
A free ecommerce profit calculator is a tool that estimates unit or order profit after you enter selling price, product cost, fees, shipping and other expenses. It should not require a credit card just to try. CrossKit’s Profit Calculator is a browser-based version for cross-border sellers on Amazon, Shopify, TikTok Shop and similar channels. It is a model you fill in, not a live connection to payouts.
Free calculators differ in which cost lines they expose. If ads and inbound freight are missing, the number will flatter you.
Steps
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Enter price and discounts
Use expected net price, not a fantasy MSRP.
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Enter landed COGS
Goods + inbound + packaging.
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Enter channel fees
Marketplace commission, payment processing, or both.
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Enter ads and returns
The two lines sellers skip and then overstock.
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Read profit and margin
Decide launch, price, or kill. Recalculate when FX moves.
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Save a named scenario per channel
“US FBA launch” and “Shopify DTC” should not overwrite each other. When ads change, update one line, not a remembered total.
What a free calculator must let you enter
Selling price after discounts, landed COGS, channel fees (marketplace commission and/or payment processing), fulfillment or shipping, ads, returns and currency. If ads and inbound are missing, the number will flatter you. It should not require a credit card just to try. CrossKit’s Profit Calculator is a browser model for Amazon, Shopify, TikTok Shop and similar channels. It does not log into payouts. Live FBA quotes still come from Amazon’s own tools; you paste them in.
One SKU, two channels
The same product on Amazon FBA and Shopify will not share one fee line. Run two scenarios in the same calculator: FBA fulfillment versus your 3PL postage. That comparison is the point of a general ecommerce calculator. Save assumptions—last month’s ad line is easy to forget. Recalculate when FX moves. Free always has limits; pay when you need accounting exports or live APIs, not because a landing page said “AI”.
CrossKit calculator
Open Profit Calculator, enter net price, landed cost, fees, shipping, ads and returns, then read profit and margin. Run Amazon FBA and Shopify as two named scenarios. Use Currency Converter when purchase and sale currencies differ. The tool is free to start and does not log into payouts. Amazon live FBA quotes still come from Seller Central; paste them in so the model is complete.
Example
Same SKU on Amazon FBA and your Shopify store will not share one fee line. Run two scenarios in the same calculator: FBA fulfillment vs your 3PL postage. That comparison is the point of a general ecommerce calculator.
Common mistakes
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Looking for a calculator that “guarantees Amazon fees” without login
Live FBA quotes need Amazon’s own tools. Independent calculators use your inputs.
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Never saving assumptions
You will not remember last month’s ad line. Keep a sheet or screenshot.
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Using MSRP in the calculator and street price in ads
The model must use the price customers actually pay, including typical coupons.
Recommended tool
Profit Calculator
CrossKit Profit Calculator is free to start in the browser and is designed for ecommerce profit estimates across marketplaces.
Frequently Asked Questions
Is CrossKit’s calculator really free?
Core tools are available for free. Higher limits and advanced features may require a paid plan.
Can I use it without Amazon?
Yes. It is a general ecommerce calculator.
Is CrossKit’s Profit Calculator free?
Core tools are available for free. Higher limits and advanced features may require a paid plan. You can start in the browser without installing software.
Can it replace my accountant?
No. It is a planning estimate for unit decisions. Tax, inventory lots and real payouts stay in your books.