Shopping & Percentage Calculators
Calculate discounts, markups, margins, tips, unit prices, and percentage changes with free shopping calculators.
Shopping & Percentage Calculators list
Choose the right tool
Discount Calculator
Discount amount = original price × discount percentage / 100. Subtract that amount from the original price; the discount must be between 0% and 100%.
Tip Calculator
Tip = bill × tip percentage / 100. Add tip to the bill, then divide the total by the whole-number party size to show each person’s share.
Percentage Calculator
Multiply the entered percentage as a decimal by the base amount: result = percentage / 100 × base. This answers “what is X percent of Y,” not percentage change.
Percentage Change Calculator
Percentage change = (new amount − original amount) / absolute value of original amount × 100. A zero original amount cannot be used as a percentage-change base.
Profit Margin Calculator
Profit = revenue − cost. Profit margin = profit / revenue × 100, so the denominator is revenue rather than cost as in markup.
Markup Calculator
Markup amount = base cost × markup percentage / 100. Selling price = base cost + markup amount; this percentage is applied to cost, not selling price.