割引計算機
Find the discount amount and the final price for any percentage off. You can also work in reverse: enter the sale price and the discount percentage to discover the original price the seller started from.
計算例
100 at 20% off: discount 20, final price 80
計算方法
- Choose forward mode (find the final price) or reverse mode (find the original price).
- Enter the price and the discount percentage.
- Read the discount amount, the final price and how much you save.
計算式
Discount = Price × Discount% ÷ 100 · Final = Price − Discount
解説
- Verifying sale prices and seasonal promotions before you buy.
- Sellers: setting promotional prices that protect your margin.
関連する計算機
よくある質問
How do I calculate a discount?
Multiply the original price by the discount percentage and subtract the result from the price. Example: 20% off $100 is a $20 discount, so the final price is $80.
How do I find the original price from a discounted price?
Divide the final price by (1 − discount ÷ 100). Example: an $80 item sold at 20% off had an original price of 80 ÷ 0.8 = $100. Use reverse mode above.
Should tax be calculated before or after a discount?
In most checkouts, tax is applied after the discount is deducted, but rules vary by country and product. Check your receipt or local tax authority for exact handling.