Start with one workflow, then move only when the result supports the next decision.

All Tools

Choose a workflow if you are trying to make a decision, or jump directly into a specific calculator if you already know what you need.

Decision Workflows

Decide whether a product is worth selling before you commit more money to inventory, pricing, or launch work.

Outcome: Keep, fix, or reject the product idea.

Decide whether paid acquisition can work, how much you can spend, and when scaling becomes risky.

Outcome: Set a CAC ceiling, ROAS target, and scale limit.

Improve average order value without giving back the gain through shipping or inventory mistakes.

Outcome: Choose an offer, shipping threshold, and reorder point.

Calculate true profit including every hidden cost.

Find your optimal price, then test what a discount does.

Compare Shopify, Amazon, Etsy, and eBay side by side.

Know your maximum CAC before you spend a dollar on ads.

Find your break-even ROAS before you launch a campaign.

Know exactly how much you can safely increase ad spend.

See if bundling actually increases your profit.

Calculate the number that protects your margin.

Never stock out, never freeze cash in excess inventory.

Validate margin, competition, and demand before you invest.