What Is a Percent Off Calculator?
A percent off calculator finds the price of an item after a percentage discount. Enter the original price and the discount percentage to calculate how much you save and how much you pay after the discount.
For example, if an item costs $100 and is 20% off, the discount is $20 and the final price is $80.
Percent Off Formula
To calculate a percentage discount, first multiply the original price by the discount percentage.
Discount Amount = Original Price × (Discount % ÷ 100)
Then subtract the discount amount from the original price:
Final Price = Original Price − Discount Amount
You can also calculate the final price directly:
Final Price = Original Price × (1 − Discount % ÷ 100)
How to Calculate 20% Off $100
Suppose an item originally costs $100 and the store offers a 20% discount.
First, calculate 20% of the original price:
Discount Amount = $100 × (20 ÷ 100)
= $100 × 0.20
= $20
Next, subtract the $20 discount from the original $100 price:
Final Price = $100 − $20
= $80
A 20% discount on $100 saves you $20, so the final price is $80.
How to Use the Percent Off Calculator
The calculator can quickly find both the amount you save and the price you pay after the discount.
- Enter the original price of the item.
- Enter the discount percentage.
- The calculator automatically calculates the discounted price when both values are valid.
- Check Final Price to see what you pay and You Save to see the discount amount.
You can also click Calculate to confirm the result or Reset to start a new calculation.
Percent Off Examples
The table below shows how different discount percentages affect the final price of an item that originally costs $100.
| Original Price | Discount | You Save | Final Price |
|---|---|---|---|
| $100 | 10% | $10 | $90 |
| $100 | 20% | $20 | $80 |
| $100 | 25% | $25 | $75 |
| $100 | 30% | $30 | $70 |
| $100 | 40% | $40 | $60 |
| $100 | 50% | $50 | $50 |
| $100 | 75% | $75 | $25 |
Quick Guide to Common Discounts
A quick way to understand a discount is to think about how much of the original price remains after the discount.
| Discount | You Pay | Example on $100 |
|---|---|---|
| 10% off | 90% of the price | $90 |
| 20% off | 80% of the price | $80 |
| 25% off | 75% of the price | $75 |
| 30% off | 70% of the price | $70 |
| 50% off | 50% of the price | $50 |
| 75% off | 25% of the price | $25 |
How Do Multiple Discounts Work?
If an item receives two discounts, such as 20% off followed by another 10% off, you should not simply add them together and call it 30% off.
Each discount is applied to the price that remains after the previous discount.
$100 with 20% off = $80
$80 with another 10% off = $72
Final Price = $72
The total savings are $28, which means the combined effective discount is 28%, not 30%.
Frequently Asked Questions
What does percent off mean?
Percent off tells you how much of the original price is being discounted. For example, 20% off means you save 20% of the original price and pay the remaining 80%.
How do I calculate a percentage off a price?
Multiply the original price by the discount percentage divided by 100 to find the amount you save. Then subtract the discount amount from the original price to find the final price.
How do I calculate 20% off a price?
Multiply the original price by 0.20 to find the discount, then subtract that amount from the original price. For example, 20% of $50 is $10, so the discounted price is $40.
How do I calculate 30% off a price?
Multiply the original price by 0.30 and subtract the result from the original price. You can also multiply the original price directly by 0.70 because a 30% discount means you pay 70% of the original price.
What does 50% off mean?
A 50% discount means half of the original price is removed, so you pay the remaining half. For example, an item originally priced at $80 would cost $40 after a 50% discount.
Is 20% off plus 10% off the same as 30% off?
No. When discounts are applied one after another, the second discount is calculated from the already discounted price. For example, 20% off followed by another 10% off gives an overall discount of 28%, not 30%.
How do I find the original price before a discount?
If you know the discounted price and the percentage off, divide the discounted price by the percentage of the original price that remains. For example, if $80 is the price after 20% off, divide $80 by 0.80 to get the original price of $100.
Does the Percent Off Calculator include sales tax?
No. The calculator finds the price after the percentage discount only. Sales tax, shipping fees, coupons, and other charges are not included unless they are already part of the original price you enter.
Can I use the calculator with any currency?
Yes. Percentage discounts work the same way regardless of currency. You can use the currency selector in the calculator to display the original price, savings, and final price in your preferred currency.
Percent Off in a Nutshell
Percent off tells you how much of an item's original price is being discounted. The discount amount is calculated from the original price, and that amount is then subtracted to find the final price.
Final Price = Original Price × (1 − Discount % ÷ 100)
For example, 20% off means you save 20% of the original price and pay the remaining 80%.
If you already know the original price and discount percentage, enter them in the calculator above to find both your savings and final price.
Related Percentage Calculators
Use these calculators for related discounts and percentage changes:
- Percentage Calculator — solve common percentage problems.
- Reverse Percentage Calculator — find the original value before a percentage reduction.
- Fraction Percent Calculator — convert between fractions and percentages.
- Percentage Decrease Calculator — measure a reduction as a percentage of the original value.
- Percentage Change Calculator — measure the relative change between two values.