Shopping & Retail
Compare prices, stack discounts, and estimate sales tax.
- Double Discount / Stacked Sale CalculatorSee the real price after two discounts stack — it's not the sum of both.
- Sales Tax / Reverse Tax CalculatorAdd tax to a subtotal, or back it out of a tax-inclusive total.
- Unit Price / Bulk Cost ComparisonCompare two products' price per unit, even in different sizes or units.