Discount Calculator
Work out the sale price instantly: discount amount, price after discount, tax and final cost.
The Discount Calculator tells you exactly what you will pay — and what you save — when something goes on sale. Enter the original price and the discount percentage, optionally add your local sales tax, and it returns the discount amount, the price after the discount, the tax and the final price you hand over at the register.
Shopping math trips up everyone: a 25% discount on a $120 item is $90 before tax, and adding 7.5% tax makes it $96.75 — but the exact numbers change with every price tag and sale banner. This tool removes the mental arithmetic, handles cents and large numbers cleanly, and is just as useful for double-checking a store's own 'was/now' pricing as for planning your budget around a sale.
Use it for clothes, electronics, furniture, bulk purchases or any discounted service. The tool works with any currency and runs completely in your browser — your prices never leave your device.
Discount amount
−$30.00
25.00% off
Price after discount
$90.00
Sales tax
$6.75
7.50% applied after discount
Final price
$96.75
You save $30.00 (25.00%) compared with the original price.
How to use the Discount Calculator
- Enter the original (pre-sale) price.
- Type the discount percentage — for example 25 for a 25% discount.
- Optionally add your sales tax rate in percent (leave 0 if there is no tax or it is already included).
- Read the discount amount, price after discount, tax and final price.
- Adjust the discount or tax to compare different offers, such as a store coupon on top of a clearance markdown.
Frequently asked questions
How do I calculate the sale price of an item?
Multiply the original price by the discount percent and subtract: sale price = original × (1 − discount ÷ 100). For a $80 item at 30% off: 80 × 0.7 = $56. If sales tax applies, add it on top of the discounted price, which this calculator does for you.
Does tax apply before or after the discount?
In almost every US state and most countries, sales tax is charged on the discounted (final) price, not the original price. This calculator applies tax after the discount, which gives the correct register total. A few jurisdictions have exceptions, so check locally if you are unsure.
How do I stack multiple discounts, like '30% off plus an extra 10%'?
Apply them one after the other rather than adding them: a $100 item at 30% off is $70, then 10% off that is $63 — a total of 37% off, not 40%. Run the first discount through the calculator, then use the result as the 'original price' for the second discount.
Is a bigger discount always the better deal?
Not necessarily — compare final prices, not percentages. A $50 item at 50% off costs $25, while a $200 item at 30% off still costs $140. If the sale is on something you would not otherwise buy, the best deal is often no purchase at all.
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