General · Popular

Discount Calculator

A quick discount calculator: enter the original price and discount percentage to see the sale price, amount saved, and effective savings. Supports stacked/double discounts too.

Original price

Discount (%)

Second discount (%) — stacked/coupon

You pay

$800

You save

$200

Discount amount

$200

Effective %

20%

You payYou save

Method

How this calculator works

A discount reduces the original price by a percentage. Stacked discounts apply sequentially — the second discount acts on the already-reduced price.

Single: Sale Price = Original × (1 − Discount/100)

Stacked: After 1st = Original × (1 − D1/100)
         After 2nd = After 1st × (1 − D2/100)

Effective % = (1 − (1−D1/100)(1−D2/100)) × 100

Enter the original price of the item.
Enter the discount percentage.
Optionally enter a second stacked discount (coupon, loyalty, etc.).
See the final sale price, total savings, and effective discount percentage.

Examples

Worked examples

Real numbers, end-to-end results.

$1,000 · 20% off

You pay $800 · Save $200

Simple single discount.

$500 · 30% + 10% stacked

You pay $315 · Save $185 · Effective 37%

Double discount is 37%, not 40%.

$2,499 · 15% off

You pay $2,124.15 · Save $374.85

Common electronics sale scenario.

Use cases

When to use it

Shopping sales — quickly check how much you actually save.
Comparing competing discounts from different stores.
Calculating effective discount on stacked coupons.
E-commerce sellers setting competitive pricing.

FAQ

Frequently asked questions

How is discount calculated?

Discount Amount = Original Price × (Discount Percentage ÷ 100). Sale Price = Original Price − Discount Amount. Simple multiplication and subtraction.

What is a stacked or double discount?

A stacked discount applies a second discount on the already-discounted price. For example, 20% off + 10% extra coupon on a $100 item = $100 → $80 → $72. The effective discount is 28%, not 30%.

Why is stacked discount less than the sum of both percentages?

Because the second discount applies to the reduced price, not the original. 20% + 10% stacked = 28% effective, not 30%. The order doesn't matter mathematically.

How to calculate the original price from sale price?

Original Price = Sale Price ÷ (1 − Discount/100). If an item costs $80 after 20% off, original = $80 ÷ 0.80 = $100.

How to calculate what percent off something is?

Discount % = ((Original − Sale) ÷ Original) × 100. If original is $50 and sale is $35, that is (15÷50)×100 = 30% off.

Does the discount calculator work for any currency?

Yes. The math is the same regardless of currency. Enter any price and the percentage applies universally.