Discount Calculator
Calculate sale price, savings, and optional tax after discount.
Savings
After discount
Total with tax
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Discount Calculator
Work out savings, final price, and tax-adjusted total before checkout.
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How To Use The Discount Calculator
Type the original price of the item into the first field, then enter the discount percent shown on the tag or coupon. The tool instantly shows three figures: how much you save, the price after the discount, and the total with tax. If you want the after-tax cost, put your local sales-tax or VAT rate into the tax field; leave it at zero to see the pre-tax sale price on its own. All three results recalculate the moment you change any number, so you can try several prices or discount levels without pressing a button.
The Math Behind A Percentage Discount
A percentage discount is simply a fraction of the original price removed. A 25% discount means you keep 75% of the price, so the sale price is the original multiplied by 0.75, and the saving is the original multiplied by 0.25. Written as formulas: saving = price × (discount ÷ 100) and sale price = price − saving. Tax, when added, is charged on the reduced price, so the final total is the sale price multiplied by (1 + tax ÷ 100). Knowing the structure makes it easy to sanity-check any deal in your head: a third off roughly means you pay two thirds, and half off means you pay half.
Sale Price At A Glance
This table shows what you pay and what you save at common discount levels. The savings and final price are calculated before tax, using the same arithmetic as the tool above.
| Original price | Discount | You pay | You save |
|---|---|---|---|
$120.00 | 10% | $108.00 | $12.00 |
$120.00 | 25% | $90.00 | $30.00 |
$120.00 | 50% | $60.00 | $60.00 |
$80.00 | 15% | $68.00 | $12.00 |
$49.99 | 30% | $34.99 | $15.00 |
$250.00 | 40% | $150.00 | $100.00 |
A useful shortcut: the percentage you pay and the percentage you save always add up to 100, so 30% off means you pay 70% of the price.
Worked Example: Stacked Discounts And Tax
Suppose a jacket is listed at $120, there is a 25% seasonal sale, and you also have a 10% member coupon. Stacked discounts apply one after another, not added together. First, 25% off $120 leaves $90. Then 10% off $90 leaves $81, so the effective discount is 32.5%, not 35%. If sales tax is 8%, it is charged on the $81, giving a final total of $87.48. To reproduce this here, enter 120 and 25% to get $90, then type 90 as the new original price with a 10% discount and an 8% tax rate.
Why This Tool Is Useful
Shop tags advertise the percentage off, but what you actually care about is the final price and whether one offer beats another. This calculator turns a discount percentage into real money in a second, so you can compare a 30%-off item against a flat-amount coupon, work out whether free shipping or a bigger discount is better value, or budget the after-tax total before you reach the checkout. It is equally handy for sellers setting markdowns and for writers building shopping or affiliate comparison pages who need the saved amount and final price side by side.
Accuracy And Privacy
The results are computed with ordinary arithmetic and rounded for display, so a final price may differ from a shop's receipt by a cent because of how each system rounds, or because the store applies tax or coupons in a different order. Treat the output as a reliable estimate for planning a purchase, not as financial advice. Everything runs locally in your browser: the prices and percentages you type are never uploaded, stored, or sent to any server, so you can check sensitive figures privately.
FAQ
How do I stack two discounts, like 20% off plus an extra 10%?
Discounts almost never add up to 30%. They are applied one after another. Take 20% off first, then take 10% off the already reduced price. On a $100 item, 20% off leaves $80, and 10% off that leaves $72, so the effective discount is 28%, not 30%. To check it here, calculate the first discount, then enter the result as the new original price and apply the second percentage.
What is the difference between percent-off and a fixed amount off?
A percent-off discount scales with the price, so 25% off saves more on an expensive item than a cheap one. A fixed amount off, such as $15 off, removes the same money regardless of price. On low-priced items a flat amount is often the better deal, while on expensive items a percentage usually wins. Compare the actual money saved rather than the headline number.
How do I find the original price from a sale price?
Divide the sale price by one minus the discount as a decimal. If an item is $90 after 25% off, divide 90 by 0.75 to get an original price of $120. This is useful for checking whether an advertised discount is real, because some shops raise the list price before the sale.
Where does sales tax fit in?
Discounts are applied first, then tax is charged on the reduced price, which is what this calculator does. Enter the tax percentage and the total with tax updates automatically. Leave the tax field at zero if your price already includes tax or you only want the pre-tax amount.
Does anything I type get uploaded?
No. Every calculation runs locally in your browser using ordinary arithmetic, so the prices and percentages you enter never leave your device and are not sent to any server. The results are estimates for planning a purchase and are not financial advice.