Free tool · runs in your browser

Discount calculator

Find the sale price and how much you save, including double discounts and sales tax.

Original priceDiscount (%)Extra discount (%, optional)Sales tax (%, optional)Quantity

Quick answer

To find a sale price, multiply the original price by (1 − discount ÷ 100): 25% off 80 is 80 × 0.75 = 60, a saving of 20. Enter the price and discount here to see the result. Add a second discount, and it applies to the already reduced price, so 20% then 10% off is 28%, not 30%. You can also add sales tax and quantity.

How to use it

Enter the price and discount. The result appears as soon as both are filled in.
Add the extras. Optionally add a second discount, sales tax and quantity.
Read the results. See what you pay, what you save and the effective discount.

Example

Two items at 100 each, with 20% off, then 10% off, then 5% tax:

Input

Price: 100, Quantity: 2
Discount: 20%, Extra: 10%, Tax: 5%

Output

Price after discount: 144.00
You save: 56.00 (28%)
Tax: 7.20
You pay: 151.20

Common errors and how to fix them

Adding two discounts gave the wrong price: Stacked discounts multiply rather than add. Use the "Extra discount" field for the second one.
Check the numbers: Discounts must be between 0 and 100%, and prices cannot be negative.

Frequently asked questions

How do I calculate a discount?

Multiply the price by the percentage and divide by 100 to get the saving, then subtract it. For 30% off 50: 50 × 30 ÷ 100 = 15, so you pay 35.

Is 20% off then 10% off the same as 30% off?

No. The second discount applies to the reduced price, so the total is 28%. On a price of 100 you pay 72, not 70.

Does the order of two discounts matter?

No. 10% then 20% gives the same final price as 20% then 10%.

Is tax charged before or after the discount?

Usually on the discounted price, which is how this calculator works. Coupons from a manufacturer can be treated differently in some places.

How do I find the original price from a sale price?

Divide the sale price by (1 − discount ÷ 100). If 75 is the price after 25% off, the original was 75 ÷ 0.75 = 100.

How do I find the percentage off?

Divide the saving by the original price and multiply by 100. The percentage calculator can do this for you too.

Is a percentage discount better than money off?

Compare them on your actual total: 20% off beats 10 off when you spend more than 50.

Which currencies does it work with?

Any. Enter plain numbers; the calculation is the same in every currency.

How do I work out what percentage I saved?

The tool shows it as "Effective discount". For other percentage questions, use the percentage calculator.

Can I add VAT or GST to the discounted price?

Yes, enter the rate in the tax field. To add or remove tax on its own, use the GST calculator.