Discount Calculator
Find sale prices, savings, and discount percentages in seconds.
What is it?
A **discount calculator** is a quick tool for working out sale prices, savings amounts, and percentage reductions. Whether you are standing in front of a shop display showing "30% off", comparing prices across different sales, or trying to figure out what percentage discount a current price represents versus the original, this tool gives you the answer in a single step. Discounts appear in every corner of everyday life: retail sales, online shopping carts, restaurant deals, subscription upgrades, invoice negotiations, and more. Mentally calculating 17.5% off $84.99 is genuinely difficult — that is exactly the kind of problem this calculator solves in under a second. This free tool handles three common scenarios in one place: given an original price and a discount percentage, it calculates the final price and total savings; given a final price and discount percentage, it works backward to reveal the original price; and given an original and final price, it calculates the exact percentage discount applied. All modes update instantly as you type.
How to use it
- Choose your calculation mode: "Price after discount", "Original price", or "What % off?".
- Enter the values you know — the tool fills in the missing number automatically.
- The result shows the final price, original price, savings amount, and discount percentage.
- Switch currencies using the currency selector, or leave it blank for a currency-neutral calculation.
- All fields update in real time as you type — no button press needed.
Why use this tool
Shopping decisions often hinge on whether a discount is actually good value. A "50% off" sign is meaningless without the original price, and a low final price might still be more expensive than a competitor's regular price. This calculator makes comparison instant and transparent. For businesses, the reverse calculation — finding the original price from a discounted final price — is useful when dealing with supplier invoices or wholesale pricing. For personal budgeting, seeing the exact savings amount in currency (not just percentage) helps you decide whether a purchase is worth making today or waiting for a deeper discount. The percentage-off calculator mode is particularly useful for price matching: if a competitor has the same product for less, you can instantly calculate what discount percentage that represents, which is useful for negotiation.
Frequently asked questions
How do I calculate 20% off a price?
Multiply the original price by 0.20 to get the discount amount, then subtract it from the original. For example, 20% off $50 = $50 × 0.20 = $10 discount, so the final price is $40. This calculator does all of that for you automatically.
How do I find the original price if I only know the sale price and discount?
Use the "Original price" mode. Enter the final price and the discount percentage, and the tool calculates the original. The formula is: original = final price ÷ (1 − discount%).
What is the difference between a discount and a markdown?
A discount is a reduction from the listed price, typically as a percentage. A markdown is a permanent price reduction for retail items that are being discontinued or cleared. Both result in a lower price, but markdowns are usually permanent while discounts are temporary promotions.
How do I calculate the total savings when buying multiple items?
Calculate the discount per item, then multiply by the number of items. For example, if each item saves $12 and you buy 4, your total saving is $48.
How do stacked discounts work?
Stacked discounts are applied sequentially, not added together. A 20% discount followed by a 10% discount is not 30% off — it is 20% off, then 10% off the already-reduced price, which equals 28% off the original. Use this calculator twice in sequence to handle stacked discounts.