Free Was-Price Calculator: EU 30-Day Rule (English, German, Norwegian)
Selling to EU or Norway buyers this Black Friday (27 November)? Your “was” price has to be the lowest price you charged in the 30 days before the sale.
This free calculator does that maths for you. Type the prices you charged in the last 30 days, your sale price and the “was” price you planned to show. You get the honest “was” price, the real % off, and a warning if your planned number would overstate the discount.
Example: normal 29, a promo at 25 in October, sale at 19. Honest “was” = 25, real discount 24%. Showing “was 39” would claim 51%.
What you get: WasPriceCalculator.html. Opens in any browser, works offline, nothing you type is sent anywhere.
Want the full check? Black Friday Price Check ($9) also checks countdowns and “only X left” claims, marks hype words in your offer text, and gives you a dated plan to Cyber Monday.
Not legal advice. National exceptions exist.