Look at the final total.
A bigger coupon may come with higher shipping costs.
Compare the two checkout totals side by side.
Choice B costs less.
The difference after coupons and shipping.
These are sample amounts. Enter actual prices and coupon terms.
Calculation rules
Final total = item price − coupon discount + shipping. Percentage discounts round down to whole KRW. Minimum orders use the price before discounts, and coupons do not apply to shipping. Coupon stacking, excluded items and shipping policies vary by store. Check the actual checkout total.
Compare the checkout totals
A: KRW 30,000 of items, a 20% coupon capped at KRW 5,000, and KRW 3,000 shipping gives a KRW 5,000 discount and KRW 28,000 total. B: the same KRW 30,000 basket, a KRW 4,000 fixed coupon and free shipping totals KRW 26,000. B is KRW 2,000 cheaper.
The calculation is item price − discount + shipping. Minimum orders use the pre-discount item price; percentage discounts round down to whole KRW. A cap of 0 means no cap, and a discount cannot exceed the item price.
Buying more for free shipping
KRW 27,000 of items with a 10% coupon and KRW 3,000 shipping totals KRW 27,300. Adding a KRW 5,000 item to meet a KRW 30,000 free-shipping minimum gives KRW 28,800. Shipping disappears, but you spend KRW 1,500 more.
In the free-shipping comparison below, choose A or B and enter the minimum and extra item price. It assumes the extra item qualifies for the same coupon and that the minimum uses the pre-discount basket. Check exclusions and after-discount thresholds with the store.
Inputs and missing discounts
- Enter each basket’s item price and actual shipping in whole Korean won.
- Choose one percentage or fixed coupon. Set minimum spend and any cap. Percentages must be 0–100.
- Review eligibility, final totals and the difference, then copy the result if useful.
A coupon below its minimum gives no discount. Stacked coupons, points, item exclusions and currency conversion are not calculated. Check that the two baskets really contain comparable items.
Storage, sharing and help
Calculations run on this device. Reloading restores the examples rather than unsaved inputs. Comparisons you explicitly save remain available to load. A copied result contains the two final totals and their difference, so check it before sharing. This tool does not place orders or process payments.
If checkout differs, check the before/after-discount threshold, cap and actual shipping first. Report the inputs and expected total without order numbers or payment details.
Features and examples checked: 14 October 2026.