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Discount Calculator

What Is a Discount?

A discount is a reduction in the regular price of a product or service, typically expressed as a percentage. Retailers use discounts to attract customers, clear inventory, and boost sales during seasonal events. Understanding how discounts work helps you evaluate whether a deal is genuinely worth taking. The calculation is straightforward: multiply the original price by the discount percentage divided by 100, then subtract that amount from the original price. For instance, a 30% discount on a $50 item means you save $15 and pay $35. Tax, if applicable, is usually calculated on the discounted price, not the original.

How to Calculate a Discount

The discount calculation follows a simple three-step process. First, calculate the savings amount by multiplying the original price by the discount rate: Savings = Price × (Discount% / 100). Second, subtract the savings from the original price to get the sale price: Sale Price = Price - Savings. Third, if sales tax applies, calculate it on the discounted price and add it: Final = Sale Price × (1 + Tax% / 100). For example, a $120 jacket at 25% off with 8% tax: savings = $30, sale price = $90, tax = $7.20, final price = $97.20. You can also combine these into one formula: Final = Price × (1 - Discount/100) × (1 + Tax/100).

Frequently Asked Questions

How do I calculate a percentage discount?

Multiply the original price by the discount percentage divided by 100. Then subtract that from the original price. Example: 25% off $80 = $80 × 0.25 = $20 savings, so you pay $60.

Is tax calculated before or after the discount?

In most US states and countries, sales tax is calculated on the discounted price (after the discount is applied), not the original price. This means you pay less tax on discounted items.

How do I calculate the original price from a sale price?

Divide the sale price by (1 - discount/100). For example, if something costs $60 after a 25% discount: $60 / (1 - 0.25) = $60 / 0.75 = $80 original price.

How do stacking discounts work?

Stacking means applying multiple discounts sequentially. A 20% off + 10% off doesn't equal 30% off. Instead: first apply 20% (pay 80%), then 10% off the new price (pay 72%). Total discount is 28%, not 30%.

What does 'up to X% off' mean?

It means the maximum discount available is X%, but most items may have smaller discounts. Typically only a few items reach the advertised maximum percentage off.

Is a bigger percentage off always a better deal?

Not necessarily. A higher-priced item at 20% off might save you more dollars than a cheaper item at 40% off. Always compare the actual dollar savings and final prices between options.