Discount Calculator
Calculate sale prices and savings. Enter original price and discount percentage to find the final price. Free online calculator. Get instant results now.
Cách thức giảm giá hoạt động
A discount reduces the original price by a percentage. The formula is simple: Final Price = Original Price × (1 - Discount%/100). For example, a 25% discount on a $80 item: $80 × 0.75 = $60.
When multiple discounts are applied (stacked), they are calculated sequentially, not added together. A 20% + 10% discount is NOT 30% off — it is 20% off first, then 10% off the reduced price, equaling 28% total.
Mẹo mua sắm
Smart shopping strategies:
- Calculate price per unit to compare differently sized packages
- Check if sale price beats generic brands — sometimes the regular price of a store brand is lower than the discounted name brand
- Use the Rule of 100: For items under $100, percentage discounts feel bigger; for items over $100, dollar amounts feel bigger
Frequently Asked Questions
Làm cách nào để tính giá gốc từ giá bán?
Divide the sale price by (1 - discount/100). Example: An item is $42 after a 30% discount. Original = $42 / 0.70 = $60.
Nhận phiếu giảm giá hay phần trăm giảm giá thì tốt hơn?
Compare the actual savings. A $10 coupon on a $40 item (25% off) is better than a 20% discount ($8 off), but worse than a 30% discount ($12 off).
Các khoản giảm giá xếp chồng có tiết kiệm được nhiều hơn một lần giảm giá tương đương không?
No. Two successive discounts of 20% and 10% equal 28% off total, not 30%. A single 30% discount saves you slightly more.