Calculate Before You Buy
Free, fast, and private shopping math tools. No sign-up. No tracking. 100% browser-based. Never overpay again — from grocery aisles to checkout pages.
Unit Price Calculator
Compare products by ounce, pound, liter, gallon, or piece. Spot the real bargain between different package sizes instantly.
Most PopularStacked Discount Calculator
Layer coupons, percentage-off, and dollar-off deals. See the exact final price and true discount rate before checkout.
Black Friday ReadyBOGO Real Deal Calculator
Buy 2 Get 1 Free, Buy 1 Get 1 50% Off — convert confusing promos into a real discount percentage and per-item cost.
Store Aisle EssentialSales Tax & Final Price
Pick your U.S. state for automatic tax rate, enter the tag price, and see the exact amount you'll pay at checkout.
USA FocusedTip Calculator & Split Bill
Calculate restaurant tips and split bills by any number of people. Pre-tax or post-tax tipping logic included.
Dining OutBlack Friday Savings Calculator
Plan your entire shopping list with original prices, discounts, and tax. See total savings before you leave the house.
SeasonalPrice Per Wear Calculator
$200 winter coat worn 200 times vs $80 fast-fashion jacket worn 10 times. Find the true cost per use.
WardrobeBulk vs. Retail Savings
Is the Costco 48-roll pack really cheaper than Target's 12-roll? Factor in storage cost and expiration risk.
Warehouse Clubs🛡️ 100% Private & Zero Maintenance
Every calculator runs entirely in your browser using JavaScript. No server, no database, no login, no cookies, no tracking. Your data never leaves your device. This also means the site will keep working forever — even if we stop updating it.
📚 Shopping Guides
🗺️ Sales Tax by State
Calculate exact checkout prices for all 50 U.S. states and major cities.
🏪 Store Coupon Policies
Maximize savings with verified stacking rules for major retailers.
📦 Bulk Buying Guides
Is buying in bulk actually cheaper? Compare 50+ products.