Discount Calculator
Calculate discount amounts, sale prices, and total savings. Supports stacked (double) discounts for extra savings.
How to Use the Discount Calculator
Finding the sale price and savings is simple:
- Enter the original price — The regular price before any discounts.
- Enter the discount percentage — The percentage off being offered (e.g., 20% off).
- Optionally enter a second discount — For stacked/double discounts, enter the additional percentage. The second discount is applied to the already-reduced price.
- Click "Calculate" — See your savings amount, final price, and effective total discount percentage.
About Discount Calculations
Discounts are one of the most common everyday calculations. The basic formula is: Discount Amount = Original Price × Discount % / 100, and the Sale Price = Original Price - Discount Amount.
Stacked or double discounts occur when two or more percentage discounts are applied sequentially. Importantly, stacked discounts are not additive — a 20% discount followed by a 10% discount does not equal a 30% discount. Instead, the second discount applies to the already-reduced price. For example, $100 with 20% off becomes $80, and then 10% off $80 gives you $72, which is an effective total discount of 28%.
Understanding how discounts work is valuable for making smart purchasing decisions during sales events, comparing offers, and maximizing savings. This calculator handles both single and stacked discounts with instant results.
Discount Calculation Examples
Here are step-by-step calculations for common shopping discount scenarios:
- $79.99 jacket at 30% off: Discount = $79.99 × 0.30 = $24.00. Sale price = $79.99 - $24.00 = $55.99. You save $24.00.
- $249 headphones at 15% off: Discount = $249 × 0.15 = $37.35. Sale price = $249 - $37.35 = $211.65.
- $499 laptop at 20% off plus additional 10% off: First discount: $499 × 0.80 = $399.20. Second discount: $399.20 × 0.90 = $359.28. Total savings: $139.72 (effective discount: 28%).
- $45 shirt: Buy 2 get 1 free (equivalent to 33% off): You buy 3 shirts at $45 each = $135 total. You pay for 2 = $90. Effective per-shirt price = $90 ÷ 3 = $30 per shirt. Savings: $45.
- Finding the original price: Item on sale for $67.50 after 25% off: Original = $67.50 ÷ (1 - 0.25) = $67.50 ÷ 0.75 = $90.00 original price.
- $1,200 TV at 40% off during Black Friday: Discount = $1,200 × 0.40 = $480. Sale price = $1,200 - $480 = $720. You save $480.
Quick Reference: Discount Savings by Percentage
Use this table to quickly see how much you save at common discount levels for different original prices.
| Original Price | 10% Off | 20% Off | 30% Off | 50% Off |
|---|---|---|---|---|
| $25 | $22.50 | $20.00 | $17.50 | $12.50 |
| $50 | $45.00 | $40.00 | $35.00 | $25.00 |
| $100 | $90.00 | $80.00 | $70.00 | $50.00 |
| $250 | $225.00 | $200.00 | $175.00 | $125.00 |
| $500 | $450.00 | $400.00 | $350.00 | $250.00 |
| $1,000 | $900.00 | $800.00 | $700.00 | $500.00 |
Frequently Asked Questions
Multiply the original price by the discount percentage and divide by 100 to get the discount amount. Then subtract that from the original price. For example, 25% off $80: Discount = $80 × 25 / 100 = $20. Sale price = $80 - $20 = $60.
A stacked (or double) discount is when two separate discounts are applied one after the other. The first discount reduces the original price, and the second discount is then applied to that reduced price. This results in a total discount that is less than simply adding the two percentages together.
No, they are not the same. 20% off followed by 10% off gives an effective discount of 28%, not 30%. On a $100 item: 20% off = $80, then 10% off $80 = $72. A straight 30% off $100 would be $70. The stacked discount saves you $28 instead of $30.
To find the original price, divide the sale price by (1 - discount/100). For example, if a sale price is $60 after a 25% discount: $60 / (1 - 0.25) = $60 / 0.75 = $80 original price.
Subtract the sale price from the original price to find the savings amount. Then divide the savings by the original price and multiply by 100. For example, an item originally $80 now on sale for $60: ($80 - $60) ÷ $80 × 100 = 25% off.
No, the order does not matter mathematically. A 20% discount followed by 10% off gives the same result as 10% off followed by 20% off. In both cases, you are multiplying the price by 0.80 and 0.90, and multiplication is commutative: 0.80 × 0.90 = 0.90 × 0.80 = 0.72.
Convert both to the same format for comparison. For a $15 off coupon on a $100 item, the percentage equivalent is 15%. If you also have a 20% off coupon, the 20% coupon saves $20 and is the better deal. Generally, percentage coupons save more on expensive items, while fixed-dollar coupons save more on cheaper items.
Most stores apply discounts and coupons before calculating sales tax. This means tax is charged only on the discounted price, saving you a small additional amount. For example, 20% off a $100 item means you pay $80 plus tax on $80, not $100 plus tax minus the discount.