How to use the discount calculator

1. Enter the original price and the discount percent.
2. Open More options to add a second, stacked discount and a sales tax rate.
3. Read the sale price, the amount saved and the total with tax.

Formula

Each discount applies to the price after the previous one, so two discounts never add up to the sum of their percentages. Prices are rounded to the cent at each step.

Worked examples

How retailers phrase discounts

"Buy one, get one 50 percent off" means the second item is half price, so the discount on the pair is 25 percent. "Up to 50 percent off" means some items are 50 percent off and others less. The calculator takes a flat percent, so convert these phrases first.

Checking a deal

Compare final prices, not percentages. A 30 percent discount on a price that was recently raised may beat no discount on a competitor, but not a lower regular price elsewhere. Add shipping and tax, then use the unit price calculator if sizes differ.

Assumptions and limits

• Discounts are between 0 and 100 percent.
• Tax is applied to the discounted price. Some places tax the price before certain coupons, so check your receipt.
• Rounding is to the nearest cent, with halves rounded up.

Formulas reviewed October 10, 2026. See the calculation methodology for how SumPanda rounds, tests and sources its formulas.

Frequently asked questions