Discount Calculator US
Find the sale price and amount saved from a discount percentage.
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How it works
A discount reduces the original price by a percentage. The saving is the price times the discount; the sale price is what remains.
Sale price = Price × (1 − discount%)Frequently asked questions
How do I calculate a discount?
Multiply the original price by the discount percentage to get the saving, then subtract it. 25% off $80 saves $20, giving $60.
What is the formula for sale price?
Sale price = original × (1 − discount ÷ 100). At 25% off, that is original × 0.75.
How do stacked discounts work?
They multiply, not add. 20% then 10% off is 0.8 × 0.9 = 0.72, so you pay 72% — a 28% total discount, not 30%.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount). A $60 price after 25% off was 60 ÷ 0.75 = $80.
How do I work out the percentage off?
Divide the saving by the original price and multiply by 100. Saving $20 on $80 is 20 ÷ 80 × 100 = 25%.
Does sales tax apply before or after the discount?
Usually after — tax is calculated on the discounted price, so a discount also slightly lowers the tax you pay.
Working out a discount
A discount calculator finds the sale price and the money saved from an original price and a percentage off. The sale price is original × (1 − discount ÷ 100), and the saving is simply the original price minus that.
Worked example
A $80 item at 25% off: the saving is 80 × 0.25 = $20, so the sale price is $80 − $20 = $60. Equivalently, you pay 75% of the original: 80 × 0.75 = $60.
Stacked discounts
When two discounts apply one after another, they multiply rather than add. A 20% discount followed by an extra 10% off is not 30% off — it is 0.80 × 0.90 = 0.72, so you pay 72% of the price, a 28% total discount.
You can also work backwards: if a $60 item was 25% off, the original was 60 ÷ 0.75 = $80. This helps you check whether an advertised "was/now" price is genuine.
Results are estimates for general guidance in United States and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.