Sales, coupons, clearance events, and promotional codes all have one thing in common: a discount percentage. Our free Discount Calculator tells you exactly how much you save and what the final price will be — in one step, no math required. Whether you are shopping online, comparing prices in-store, or calculating a trade discount for your business, this tool gives you the answer instantly.
Discounts are expressed as a percentage off the original price. A 30% discount on a $150 item saves you $45 — leaving a sale price of $105. Our calculator handles the arithmetic so you can focus on deciding whether the deal is worth it.
How Discount Calculations Work
The formula for finding the discounted price of any item is straightforward. First, convert the discount percentage to a decimal by dividing by 100. Then multiply by the original price to find the saving amount. Finally, subtract the saving from the original price to get the sale price.
Saving = Original Price × (Discount % ÷ 100)
Sale Price = Original Price − Saving
For example, a jacket priced at $200 with a 25% discount: Saving = 200 × 0.25 = $50. Sale price = 200 − 50 = $150.
Worked Examples
Example 1 — Clothing sale: A coat originally costs $180 and is 40% off. Saving = 180 × 0.40 = $72. Sale price = $108.
Example 2 — Electronics: A laptop listed at $950 has a 15% promotional discount. Saving = 950 × 0.15 = $142.50. Sale price = $807.50.
Example 3 — Stacked discounts: An item is $100, first discounted 20% (to $80), then an additional 10% coupon applied. The second 10% applies to $80, not $100 — saving $8 more. Final price = $72, not $70. Stacked discounts do not simply add up.
Example 4 — Finding the discount percentage: An item was $60, now $45. Discount % = ((60 − 45) ÷ 60) × 100 = (15 ÷ 60) × 100 = 25% off.
Discount Reference Table
| 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 |
| $200 | $180.00 | $160.00 | $140.00 | $100.00 |
| $500 | $450.00 | $400.00 | $350.00 | $250.00 |
Tips for Getting the Best Deal
Before assuming a sale price is a genuine discount, check the item’s price history. Some retailers inflate the “original price” before applying a discount, making a modest reduction look like a major deal. Price tracking browser extensions and comparison websites make it easy to see whether the stated original price is real.
When stacking multiple discount codes or coupons, always confirm whether they are applied sequentially or combined. Sequential discounts (each applied to the reduced price) yield a lower final price than a single combined percentage might suggest. For instance, two 10% discounts applied in sequence give a 19% total reduction, not 20%.
Frequently Asked Questions
How do I calculate a discount percentage?
Divide the discount amount by the original price, then multiply by 100. For example, if an item costs $80 but is on sale for $60, the discount is $20. Discount % = (20 ÷ 80) × 100 = 25%.
What is the difference between a discount and a rebate?
A discount reduces the price at the point of sale — you pay less immediately. A rebate is a partial refund given after purchase, usually requiring you to submit a claim. Rebates often go unclaimed, so the effective saving is lower than advertised.
Can I stack two discount codes?
It depends on the retailer’s policy. When stacking is allowed, the second discount usually applies to the already-reduced price, not the original. Always calculate the total saving carefully to avoid surprises at checkout.
Is a 50% discount the same as buying two and getting one free?
Not exactly. “Buy two get one free” means you pay for two items but receive three — an effective discount of 33% per item, not 50%. A true 50% discount means every item is half price.
How do I calculate the original price from a sale price?
Divide the sale price by (1 − discount/100). For example, if an item is $75 after a 25% discount, the original price = 75 ÷ (1 − 0.25) = 75 ÷ 0.75 = $100.
Do discounts apply before or after sales tax?
In most regions, discounts are applied to the pre-tax price first, then sales tax is calculated on the discounted amount. This means both the discount and the tax are lower than if applied the other way around.