Optional — applied after the first discount.
Shopping a sale? Enter the original price and the discount to see exactly what you will pay — and how much you keep in your pocket. Stacked offers like "30% off, plus an extra 10%" are handled correctly.
How to use the Discount Calculator
- 1 Enter the original (list) price.
- 2 Enter the discount percentage, and an extra discount if the offer stacks.
- 3 See the final price, total savings and the effective overall discount.
Formula
Final price = Price × (1 − D1 ÷ 100) × (1 − D2 ÷ 100) Savings = Price − Final price
Worked examples
Input: $80 with 25% off
Result: $60.00
You save $20.00
Input: $120, 30% off + extra 10%
Result: $75.60
Effective discount is 37%, not 40%
Why stacked discounts are not additive
"30% off plus an extra 10% off" sounds like 40%, but the second discount applies to the already-reduced price: 0.70 × 0.90 = 0.63, so you pay 63% of the original — an effective discount of 37%.
Discount vs. coupon codes
Fixed-amount coupons ($10 off) and percentage discounts behave differently: a fixed coupon is worth more on cheap items, a percentage discount is worth more on expensive ones. When you can choose the order, apply percentage discounts before fixed coupons if the shop allows it.
Frequently asked questions
How do I calculate 20% off a price?
Multiply the price by 0.80. A $45 item at 20% off costs $36.
How do I find the original price from the sale price?
Divide the sale price by (1 − discount ÷ 100). $36 after 20% off was originally $36 ÷ 0.8 = $45.
Is sales tax included?
No — add tax afterwards with the Sales Tax Calculator, since tax is normally charged on the discounted price.
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