// Finance
Discount Calculator online
Calculate sale prices, discount amounts, and original prices
by
CHUNKY
MUNSTER
MUNSTER
Three values define a discount: the original price, the discount percentage, and the final sale price. Any two determine the third. This calculator handles all three modes and also shows the savings amount in currency — useful for quickly verifying discount labels in retail, planning promotions, or checking whether a "sale" price represents a genuine reduction.
Retailers don't always make it easy to verify whether a "40% off" label is accurate. If the original price is £80 and the sale price is £52, the actual discount is (80 − 52) / 80 = 35%, not 40%. Enter the two prices and the tool calculates the real percentage. Conversely, to find what "25% off £149.99" becomes, enter the original and percentage and read the discounted price.
Discount % = ((Original − Sale) ÷ Original) × 100. For example: original £100, sale £75 → ((100−75)/100) × 100 = 25%.
Original = Sale ÷ (1 − discount%). If an item is £60 after a 25% discount: Original = 60 ÷ 0.75 = £80.
Two successive discounts of 20% and 10% are not the same as a single 30% discount. On a £100 item: 20% off = £80, then 10% off £80 = £72. Single 30% off = £70. The compound discount gives 28% off, not 30%.
In retail: a discount is a reduction from a price (may be temporary). A markdown is a permanent price reduction, often used when clearing inventory. Both calculate the same way — original price minus new price.
See also the VAT Calculator, Tip Calculator, and Compound Interest Calculator.