Discount Calculator
Calculate sale prices, percentage discounts, stacked discounts, and find original prices instantly.
Discount Calculator
Calculate sale prices & savings
Original
100.00
Sale Price
80.00
You Save
−20.00
Effective Discount
20% off
How to Use
- 1 Select a discount mode: Percent Off, Fixed Amount, Double Discount, or Find Original Price
- 2 Enter the original price of the item
- 3 Enter the discount value — percentage or fixed amount depending on mode
- 4 For Double Discount mode, enter both discount percentages (e.g., 20% then 10% off)
- 5 View your savings and final sale price instantly — results update in real time
What You Get
Four discount calculation modes: percentage off (e.g., 30% off), fixed amount off (e.g., 15 off), stacked/double discounts (20% + 10%), and reverse calculation (find the original price from the sale price and discount %). Real-time results with copy-to-clipboard.
Input: 80 with 25% off
Output: You save 20 → Final price: 60 (25% discount)
Input: 120 with 15 fixed discount
Output: You save 15 → Final price: 105 (12.5% effective discount)
Input: 200 with 20% + 10% double discount
Output: First: 200 → 160 (−20%), then 160 → 144 (−10%). Total savings: 56 (28% off)
Input: Sale price 72, discount was 40%
Output: Original price was 120. You saved 48.
How do I calculate a percentage discount?
To calculate a percentage discount, multiply the original price by the discount percentage divided by 100, then subtract that from the original price. For example, 30% off 80: savings = 80 × 0.30 = 24, final price = 80 − 24 = 56. This calculator does it instantly for you.
How do I calculate 20% off a price?
Multiply the price by 0.20 to get the savings, then subtract from the original price. For example, 20% off 50: savings = 50 × 0.20 = 10, so the final price is 40. Alternatively, multiply the price by 0.80 (which is 1 minus 0.20) to get the sale price directly: 50 × 0.80 = 40.
Is 20% off plus 10% off the same as 30% off?
No! Stacked discounts are not additive. A 20% off plus an additional 10% off equals 28% total discount, not 30%. The second discount applies to the already-reduced price. Example: 100 → 80 (−20%) → 72 (−10% of 80). The total discount is 28 (28%), not 30.
How do I find the original price before a discount?
Divide the sale price by (1 minus the discount rate). For example, if you paid 60 after a 25% discount: original = 60 ÷ (1 − 0.25) = 60 ÷ 0.75 = 80. Use the "Find Original" mode in this calculator to do it automatically.
How do I calculate the discount percentage?
Subtract the sale price from the original price, divide by the original price, and multiply by 100. For example: original 80, sale price 56. Discount = (80 − 56) / 80 × 100 = 30%. This tells you the item is 30% off.
What is a good discount percentage?
It depends on the product and industry. Generally, 10–20% off is a standard promotion. 30–50% off is a significant sale. 50%+ is clearance pricing. Black Friday deals typically range from 20–60% off. A truly good discount preserves value while meeting your budget.
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