Discount Calculator

What is discount calculator?

A discount calculator tells you what you will actually pay during a sale and how much you save. It removes the guesswork from offers like 30 percent off or buy now and save 15 percent.

Add a tax rate to see the final price at the register. Many shops show prices before tax, so the real total is a little higher.

How to use the discount calculator

1. Enter the original price.
2. Enter the percent off.
3. Add a tax rate if you want the final price with tax.

How the discount calculator works

Savings equal price times discount divided by 100. Sale price is price minus savings. Tax is applied to the sale price, not the original price.

Worked example

Common uses of the discount calculator

• Checking the real price during a sale or promotion.
• Comparing two offers with different discounts and starting prices.
• Finding the original price from a sale price.
• Working out the final price including tax.
• Planning a budget for a seasonal shopping event.

Tips and common mistakes

Stacked discounts do not add up. Taking 20 percent off and then 10 percent off is 28 percent off in total, not 30.

Compare the final price per unit across shops, since a deeper discount on a higher starting price is not always cheaper.

Background: what to know before you rely on it

Retailers use percentages in many ways. A sign reading 30 percent off is clear, but offers such as buy two get one free or an extra 20 percent off sale items need more math. When discounts are stacked, each applies to the new price, so 20 percent and then 10 percent equals 28 percent in total. Another trick is the anchor price, where a high original price makes the discount feel larger. The best habit is to compare final prices per unit, not discount labels. Check the price history if you can, since some items are marked up before a sale.

Private, free and fast

This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all finance calculators, or browse the full list of tools.

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Results are for information and education. For legal, financial, medical or security decisions, check with a qualified professional. Estimates only. Confirm with your lender or accountant.