Discount Calculator
Discount Calculator — runs in your browser. Inputs are not stored.
Discount & tax-inclusive price
Enter values, then press Calculate.
※ Price including VAT is the discounted price plus 10% VAT. Store or online policies may differ.
How to use
- Enter the list price (KRW)—the price before the sale.
- Enter the discount rate (%). A 30% sale is 30.
- If checkout shows VAT, turn on include 10% VAT.
- Press Calculate to see the discount amount and final sale price.
- For monthly installments, put the final price into the installment calculator.
Key concepts: discount rate and sale price
Sale price = list price × (1 − discount rate). “30% off” means you pay 70% of list. Discount amount is list − sale price. A coupon applied after the rate changes the felt discount, so calculate once per checkout step.
The include-VAT option is for estimating a tax-inclusive checkout total. For supply value and tax only, use the VAT calculator. Results are for reference.
Example
List 100,000 KRW at 20% off is 20,000 KRW off and 80,000 KRW sale price. Split that 80,000 KRW over 12 interest-free months and the installment calculator shows about 6,667 KRW per month. If you also use a 5,000 KRW coupon, set list to 75,000 KRW and calculate again.
Related: Percent calculator · VAT calculator · Installment calculator
Frequently asked questions
How do I apply a coupon and a discount rate together?
Adjust the list price in actual checkout order, then calculate again. The tool does not combine two discounts in one field.
I only want VAT?
Use the <a href="/tools/vat/">VAT calculator</a>.
What do I pay on a 30% sale?
70% of list price. Enter discount rate 30 to get the sale price.
I know the discount amount instead of the rate?
To get a ratio from list price and discount amount, use change and composition in the <a href="/tools/percent-calculator/">percent calculator</a>.
What about card installment fees?
This screen only calculates the discount. If there is interest, put the final price in the installment calculator.
Are prices saved?
No. Calculation runs only in the browser.
Last reviewed: 2026-09-04