Free tools from Crystal Magnate
Free ecommerce tools for better business decisions.
Calculate advertising limits, understand product contribution, and plan inventory using your own business data.
A practical answer starts here
What do you want to improve?
Six tools. Your data. A clearer next step.
6 tools found
Advertising
Break-even ACOS
How much can I afford to spend on ads?
Profitability
Ecommerce profit
What do I keep after the costs?
Inventory
Inventory reorder
When should I place my next order?
Advertising
Amazon PPC audit
Which search terms need a closer look?
Inventory
Overstock inventory
Where am I carrying too much stock?
Profitability
SKU profitability
Which products contribute to my margin?
Built for day-to-day ecommerce work
Use the numbers behind the decisions you make every week.
Advertising, product costs, and inventory affect one another. These tools help you examine each decision with consistent inputs and clear assumptions.
- Check whether advertising targets leave enough contribution.
- Identify products with incomplete or negative contribution.
- Review stock cover before placing another order.
How it works
Get a useful result in three steps.
Choose a tool
Select an advertising, profitability, or inventory question.
Enter your data
Add a scenario or upload a CSV. Sample data is available in every tool.
Review the result
Check the assumptions, export the findings, or request help from our team.