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Simple calculators for quick decisions.
Fast, clear, and reliable tools for everyday calculations—pricing, fees, budgets, and more. See results instantly with transparent formulas.
Simple inputs
Enter values → get results instantly.
Transparent formulas
How it works • Formula • FAQ on every tool.
Built to scale
E-commerce now, Tax/Wedding next.
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Most-used calculators (free)
Quick tools designed for speed and clarity. Every calculator includes how it works, the formula, and FAQs so you can trust the result.
Profit Margin
Net profit & net margin after costs and fees.
Break-even Price
Minimum selling price to avoid losses.
Product Pricing
Reverse-calc a recommended selling price.
Ad Cost / Order
Max ad spend per order while keeping margin.
Amazon FBA Fee
Simple fee estimate + profit check.
Currently available: E-commerce tools. More categories will be added over time.