How to calculate a discount?

To calculate a discount, multiply the original price by the discount percentage and divide by 100. This gives you the discount amount. Subtract this amount from the original price to get your final discounted price.

How is tax calculated after a discount?

Tax is always calculated on the discounted price, not the original price. You calculate the tax percentage on the new lower price and add it to get your final payable amount.

Yes, our discount calculator is 100% free to use. It runs entirely on your browser, making it extremely fast and privacy-friendly.

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Discount Calculator

Discount Calculator

Instantly calculate how much you save during a sale. Add sales tax to find out the exact final price you will pay.

Original Price

Discount (%)

Sales Tax / GST (%) (Optional)

Tax is applied on the discounted price, not the original price.

Final Price to Pay 0.00

Original Price 0.00

Discount Amount 0.00

Tax Added 0.00

Total Savings 0.00

About Our Discount Calculator

Whether you're shopping during a massive holiday sale, calculating wholesale margins, or just trying to figure out if a deal is actually worth it, our free online Discount Calculator makes the math easy. Not only does it instantly calculate your savings, but it also allows you to factor in sales tax (or GST) to reveal the absolute final price you will pay at the checkout counter.

How does the math work?

1. Finding the Discount

To find out how much money is being taken off the price, we multiply the original price by the discount percentage.


                    Saved = (Price × Discount %) / 100

2. Adding the Tax

Tax is applied to the newly discounted price. We calculate the tax amount and add it to the discounted price.


                    Final Price = Discounted Price + Tax

Frequently Asked Questions

In almost all retail scenarios globally, sales tax (or GST) is calculated after the discount has been applied to the item. You only pay tax on the actual amount of money changing hands. Our calculator automatically handles this correctly.

It's simple math: Multiply 1000 by 0.20 (which represents 20%). That equals 200. This is your discount amount. Subtract 200 from 1000, and your final price is 800.

Yes! The site is fully responsive. You can easily pull out this calculator on your smartphone while standing in a store to instantly check if a deal is actually good before walking to the billing counter.