Decision tool

Compare a current price with clearly labelled contexts

A percentage is only arithmetic until its comparison basis is understood. Examine each entered basis separately without turning an advertised reference into price history.

LOCAL-ONLY CALCULATOR

Keep every comparison basis separate

Enter only figures you already have. Blank references stay withheld. Your values remain in this browser tab and are not saved or sent.

Entered amountsCurrencyCurrent priceThe amount currently shown for the exact offer; this tool does not verify it. Enter a positive number using no more than two decimal places and no grouping separators.Advertised comparison priceA seller-presented comparison amount. Its meaning and validity are not verified here.Entered historical typical priceA typical or median amount only if your source and disclosed window genuinely support it.Entered tracked lowest priceA lowest amount only if continuous exact-variant history genuinely proves it.

What this result means: It shows arithmetic relationships between your entries. It does not prove a previous price, historical window, exact-variant match, source permission, price history, deal quality or PV True Discount—and it never enables an affiliate link.

Learn why the bases differ in the sale-price verification guide. Then review wider gaps with the offer evidence checklist.