Work out exactly what you'll pay and save in a sale. Enter the original price and the discount, add a second stacked discount or sales tax if you like, and see the final price and your real savings instantly.
You pay
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Price after discount(s)—
Effective total discount—
Calculations run entirely in your browser. Nothing is sent anywhere.
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How sale discounts really add up
A single percentage off is easy, but stacked discounts trip people up. Two discounts of 25% and 10% are not 35% off — they apply one after another, giving 32.5% off, because the second discount comes off the already-reduced price. This calculator handles stacking correctly so you see the true effective discount, not the misleading sum of the two percentages.
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Spotting a genuine deal
A big percentage off only matters relative to a fair starting price. Retailers sometimes inflate the 'original' price to make a discount look larger, so compare the sale price against what the item normally sells for elsewhere, not just the marked-down percentage. Use the money-saved figure here, then sanity-check the final price against the real market price before deciding it's a bargain.
Don't forget tax and shipping
The headline sale price isn't always what you pay. Sales tax or VAT can add a meaningful amount at checkout, and shipping can wipe out a small discount entirely. Add the tax percentage here to see your true out-the-door price, and remember to factor delivery costs in separately when comparing a sale item against buying locally.
Frequently asked questions
How do I calculate a percentage discount?
Multiply the original price by the discount percentage to get the amount off, then subtract it. For example, 25% off 80 is 80 × 0.25 = 20 off, giving a sale price of 60. This calculator does it instantly and also shows the exact money saved, plus handles stacked discounts and tax for the true final price.
How do stacked discounts work?
Stacked discounts apply one after another, not added together. A 25% discount followed by an extra 10% gives 0.75 × 0.90 = 0.675 of the original, i.e. 32.5% off — not 35%. The second discount comes off the already-reduced price. This tool calculates stacked discounts correctly so you see the real effective saving.
Does this calculator include sales tax?
It can. Enter your sales tax or VAT rate in the optional tax field and the calculator adds it after the discounts to show your true out-the-door price. Leave it at zero to see just the discounted price. Note that whether tax applies before or after a discount can vary by region, but discounts almost always come off the pre-tax price.
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