Discount Sale Price Calculator
Shopping a sale? This calculator shows your final price after a percentage discount and tells you exactly how much you save. Add optional sales tax to see the true checkout total.
How it works
The sale price is found by subtracting the discount amount from the original price. The discount amount is simply the original price multiplied by the discount rate: discount = original × (percent ÷ 100).
Final price = original − discount. If you enter a sales tax rate, the calculator applies it to the discounted price (most regions tax the price you actually pay, not the original): total = discounted price × (1 + tax ÷ 100).
Tips
Watch for 'stacked' discounts — taking 20% off then an extra 10% off is not 30% off. It equals 0.80 × 0.90 = 0.72, or 28% off the original.
To check whether a 'buy one get one half off' beats a flat percentage, compare the effective discount per item before deciding.
FAQ
How do I calculate a 25% discount?
Multiply the original price by 0.25 to get the savings, then subtract that from the original price. For example, 25% off $80 is $20 off, leaving a sale price of $60.
Is tax applied before or after the discount?
In most places, sales tax is charged on the discounted price you actually pay, so this tool applies tax after the discount.
How do I combine two discounts?
Apply them one at a time. A 20% then 10% discount multiplies the remaining percentages: 0.80 × 0.90 = 0.72, meaning you pay 72% of the original price (28% off total).