How do I calculate a percentage discount?

Multiply the price by the discount as a decimal, then subtract: final = price × (1 − discount ÷ 100). For example, 25% off $80 is $80 × 0.75 = $60, so you save $20. This tool does it automatically as you type.

Do two stacked discounts add together?

No — they apply sequentially, so 20% then 10% off equals 28% off, not 30%. The second coupon comes off the already-reduced price, not the original: $100 → $80 → $72. You save $28, and the combined effective discount is 28%.

What is the difference between the sale price and the amount saved?

The sale price (final price) is what you actually pay after the discount. The amount saved is how much the discount took off — the gap between the original price and the sale price. This tool shows both so you can compare deals either way.

Does the order of stacked discounts change the final price?

No. Because the final price is the product of all discount factors, multiplication is order-independent — applying 20% then 10% gives the same result as 10% then 20%. The combined effective discount stays the same regardless of order.

Discount Calculator | Free Online Tool

How to use

1.Enter the original price and the discount percentage — the final price and amount saved appear instantly.
2.To combine coupons, click 'Stack another discount' and add each extra percent; discounts apply one after another, not added together.
3.Read the final price you pay, the total you save, and (when stacking) the true combined effective discount percentage.

About Discount Calculator

The Discount Calculator turns any percent-off deal into the two numbers that actually matter: the final sale price you pay and the amount of money you save. Type an original price and a discount percentage, and the result updates instantly in your browser — no sign-up, no math, no spreadsheet.

The core formula is simple: final = price × (1 − discount ÷ 100), and amount saved = price − final. So $80 at 25% off means you pay $60 and save $20. A 0% discount leaves the price unchanged; 100% off makes it free. Because everything runs client-side, your inputs never leave your device.

Where shoppers most often go wrong is stacking discounts. It feels natural to add coupons together — 20% off plus an extra 10% off must be 30% off, right? It isn't. Percentage discounts apply sequentially, each one to the price that remains after the previous cut. Take 20% off $100 first and you have $80; take another 10% off that $80 and you land at $72. That is a 28% total discount, not 30% — you save $28, not $30. The 2% gap comes from the second coupon acting only on the already-reduced amount, never on the original price.

This tool models that behavior exactly. Add as many stacked discount rows as your deal allows, and it computes the final price as final = price × Π(1 − dᵢ ÷ 100) — the running product of every discount factor — then reports the combined effective discount as a single equivalent percentage. That effective rate is always less than the naive sum of the percentages, and the difference grows as you stack more coupons. It is the honest number to compare against a competitor's single-coupon offer.

Use it to check whether a store's 'extra 15% off clearance' beats a flat 40% sale, to confirm a cashier applied coupons correctly, to price bulk or tiered promotions, or to work out clearance-tag math on the spot. Because it separates sale price from amount saved, you can optimize for whichever goal matters — spending the least, or maximizing the discount you can brag about.

Methodology note for the precise: single-discount math is a straight multiplication, and stacked discounts are commutative — the order of the percentages does not change the final price, since multiplication is order-independent. Rounding is applied only at display time (two decimals), so intermediate values stay exact. All calculation happens locally in JavaScript; nothing is stored or transmitted.

Frequently asked questions

How do I calculate a percentage discount?: Multiply the price by the discount as a decimal, then subtract: final = price × (1 − discount ÷ 100). For example, 25% off $80 is $80 × 0.75 = $60, so you save $20. This tool does it automatically as you type.
Do two stacked discounts add together?: No — they apply sequentially, so 20% then 10% off equals 28% off, not 30%. The second coupon comes off the already-reduced price, not the original: $100 → $80 → $72. You save $28, and the combined effective discount is 28%.
What is the difference between the sale price and the amount saved?: The sale price (final price) is what you actually pay after the discount. The amount saved is how much the discount took off — the gap between the original price and the sale price. This tool shows both so you can compare deals either way.
Does the order of stacked discounts change the final price?: No. Because the final price is the product of all discount factors, multiplication is order-independent — applying 20% then 10% gives the same result as 10% then 20%. The combined effective discount stays the same regardless of order.

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