Discount Calculator
Original price and percent off in — sale price, savings, and the real checkout total out.
"25% off, plus an extra 10% with code" — what does that actually cost? Retail math is designed to be done in your head badly. This calculator does it precisely: enter the original price and the discount to see the sale price and your savings, then optionally stack a second discount and add your local sales tax to get the number that will actually hit your card at checkout.
The stacking option matters because sequential discounts don't add: 25% off followed by an extra 10% off is 32.5% total, not 35% — the second coupon applies to the already-reduced price, which is exactly how store checkouts compute it. The effective-discount readout shows the true combined percentage so you can compare a "stacked" deal against a straight discount elsewhere. Tax is applied after discounts, matching US retail practice. For the reverse question — what was the original price before the markdown — or any other percent arithmetic, the percentage calculator covers it; for tax on its own, there's a dedicated sales tax calculator.
How to use the Discount Calculator
- Enter the original (pre-sale) price.
- Enter the discount percentage from the tag or promo.
- Optionally tick Add a second discount for stacked coupon codes, and Add sales tax with your local rate.
- Read what you'll pay, what you save, and the true combined discount percentage.
Frequently asked questions
Why isn't 25% off plus 10% off the same as 35% off?
Because the second discount applies to the already-discounted price. $100 → 25% off → $75 → extra 10% off → $67.50, which is 32.5% total. A straight 35% would be $65. Retailers stack this way universally — it always favors the store slightly.
Is sales tax charged on the original or discounted price?
The discounted price — in US states, tax applies to what you actually pay after store discounts and coupons. (Manufacturer coupons are taxed differently in a few states, a niche exception.) The calculator taxes the discounted amount.
How do I figure out the original price from a sale price?
Divide the sale price by (1 − discount). $67.50 after 25% off means 67.50 ÷ 0.75 = $90 originally. The percentage calculator's rows handle this reverse math directly.
What's a good rule of thumb for quick discount math in a store?
Take 10% (move the decimal), then scale: 30% off = 3× that; 25% off = quarter off. For $79.99 at 30% off: 10% is $8, so about $24 off ≈ $56. This calculator is for when "about" isn't good enough.
Does the calculator handle 'buy one get one 50% off' deals?
Indirectly: BOGO-50 on two identical items is 25% off the pair — enter the combined price with 25%. For mixed-price items, stores discount the cheaper one; enter that item alone at 50% to see the deal's real value.