AI shopping math for real life

Know the real cost before you buy.

WhatsMyTotal helps shoppers estimate the full cost of a purchase before checkout — including tax, shipping, hidden add-ons, and budget tradeoffs.

Calculate my total See example

Example estimate

That $1,750 setup might really cost $2,073.

Item prices are only the starting point. Taxes, shipping, forgotten accessories, warranties, and setup costs can change the real decision.

Gaming PC setup $1,750
Estimated tax $154
Shipping / extra known fees $49
Likely add-ons $120
Real estimated total $2,073

Try it now

What are you trying to buy?

Add your goal, budget, location, and any known prices. WhatsMyTotal creates a realistic estimate and a shopping prompt you can copy into ChatGPT.

State rates are starting estimates. Local city/county rates and item rules may vary.

Examples

Use it before big or messy purchases.

Why this matters

Most people budget for the item. They forget the total.

Taxes

Sales tax can push a purchase higher than expected.

Shipping

Delivery, freight, and returns can change the decision.

Add-ons

Accessories, setup, warranties, and subscriptions add up.

Tradeoffs

Sometimes the smarter move is changing the plan, not the budget.

Built by MainStreet AI Hub

An early experiment in better shopping decisions.

WhatsMyTotal is a simple consumer AI experiment from MainStreet AI Hub. It helps shoppers think through the full cost before they spend.

Privacy

Simple privacy promise.

WhatsMyTotal does not require an account. Calculator inputs run in your browser. We use Google Analytics to understand basic site usage, such as page visits and button clicks. We do not sell personal data.

Questions? Email support@mainstreetaihub.com.

Early access

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