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출처 및 방법론
Sale Price = Original × (1 - Discount%/100)Discount calculation
How to Use the Discount Calculator
Quickly calculate sale prices, savings, and final costs. Whether you're shopping online or in-store, know exactly how much you'll save and pay with any discount percentage or amount off.
Two Discount Types
- Percentage Off: Common for sales like "30% off" or "Buy one get one 50% off"
- Amount Off: Fixed dollar discounts like "$20 off" or coupon codes
Percentage Math
Need help with percentage calculations? Our percentage calculator handles all types of percentage math. For a deep dive, read our Complete Guide to Percentage Calculations.
Related Calculators
Calculate tips at restaurants with our tip calculator. Compare your savings over time with our compound interest calculator.
Shopping Tips
- Compare percentage off vs. dollar amount—whichever saves more depends on the price
- Stack coupons with sales when allowed for maximum savings
- Consider if you actually need the item—a "deal" isn't a deal if you wouldn't buy it otherwise
- Don't forget to factor in tax on the discounted price
자주 묻는 질문
Multiply original price by (1 - discount percentage). For 30% off $80: $80 x 0.70 = $56 sale price. Or calculate discount amount ($80 x 0.30 = $24) and subtract from original ($80 - $24 = $56).
Divide sale price by (1 - discount percentage). If something is $42 after 30% off: $42 / 0.70 = $60 original price. This reverse calculation helps you understand true discounts.
Calculate final prices to compare. $100 with 25% off ($75) beats $90 with 15% off ($76.50). Also compare dollars saved vs. percentage - $20 off $50 (40%) may be better than 30% off $100 ($30 off) depending on what you need.
It depends on the original price. On a $100 item, they are equal. On items over $100, $30 off saves more. On items under $100, 30% off saves more. Always calculate both ways to find the better deal.
Sequential discounts multiply, they do not add. 20% off plus 10% off is not 30% total. Its $100 x 0.80 x 0.90 = $72, equivalent to 28% off. The order does not matter mathematically, but the total discount is less than the sum.
The best deal is not buying what you do not need. A 50% discount still costs 50% of the price. Consider if you would buy it at full price and if you actually need it. Sales are most valuable on planned purchases.
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