Shopping Calculators
Never miss a deal again. All calculators adapt to your country's tax brackets, currency, and government schemes automatically.
🇺🇸 Showing data for United States · USD (US Dollar)
Discount Calculator
Calculate final price after discounts, coupon codes, and seasonal sales.
Price Per Unit Calculator
Compare unit prices across different package sizes to find the best deal.
Shopping Budget Planner
Plan your monthly shopping budget by category and track spending against your limits.
Cashback & Rewards Calculator
Calculate your actual cashback earnings and reward points value across credit cards.
Bulk Buy Savings Calculator
Determine if buying in bulk actually saves you money compared to regular-sized purchases.
Understand the numbers
Plain-language guides to the ideas behind these shopping calculators, with worked examples and primary sources.
The Real Cost of Your Subscriptions (and How to Audit Them)
Monthly prices are designed to look small. Annualising them, price-per-use, and a 20-minute audit — with worked numbers.
Unit Price: The One Number That Makes Prices Comparable
Package prices are incomparable by design. How price-per-unit cuts through, when bulk is a false economy, and worked grocery math.