Online Auction Calculator

Know your real auction cost before you bid. Auction Calculator is a fast, simple tool that shows the true cost of winning an auction — before buyer’s premium, tax, shipping, and card fees turn a good deal into a bad one. Domestic U.S. Auctions • Buyer’s premium calculations • Sales tax estimates • Shipping & handling • Credit card / PayPal fees Foreign & International Auctions (One-time $3.99 unlock) • Real-time foreign exchange rates • Automatic USD conversion • Import tariff estimates • Avoid surprise fees from FedEx, DHL, and UPS • Supports EUR, GBP, JPY, CAD, AUD, CHF, and more Designed for collectors who bid seriously — coins, antiques, art, and collectibles — and want clear numbers without subscriptions or ads. No advertising. No tracking. No subscriptions. One app. One purchase. Total transparency.