Discount Calculator
See the sale price and how much you save, instantly.
A discount calculator removes the mental math from shopping — especially with awkward percentages like 35% off $79.99.
How to use
- Enter the original price and the discount percentage.
- Click Calculate to see the sale price and your savings.
- Handy for sale season, coupons and comparing deals.
About this tool
Pair it with coupon hunting: a lower sale price plus a promo code stacks your savings even further.
Nothing you enter leaves your browser.
How it works
A discount removes a slice of the original price: savings = price x (discount / 100), and you pay price - savings. Equivalently, the sale price is price x (1 - discount / 100) — multiply the price by what remains after the discount.
When two discounts stack, the second usually applies to the already-reduced price, not the original. A 20% coupon on top of a 30% sale is not 50% off: it is 1 - (0.70 x 0.80) = 44% off the original.
Worked examples
35% off $79.99: Savings: 79.99 x 0.35 = $28.00 (rounded). You pay: 79.99 - 28.00 = $51.99.
Stacked: 30% sale plus 20% coupon on $100: Sale price: 100 x 0.70 = $70. Coupon applies to $70: 70 x 0.80 = $56. Total savings $44 — a 44% effective discount, not 50%.
Quick reference
| Discount | You pay | $100 item costs |
|---|---|---|
| 10% off | 90% | $90.00 |
| 25% off | 75% | $75.00 |
| 30% off | 70% | $70.00 |
| 50% off | 50% | $50.00 |
Frequently asked questions
How do you calculate 25% off $100?
Multiply $100 by 0.25 to get $25 off — you pay $75.
Can discounts stack?
It depends on the store: some apply the second discount to the already-reduced price, others to the original. Ask at checkout.
Is my input stored?
No — all calculations run locally.
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