# Discount Calculator

URL: https://speedycalculator.com/calculators/everyday-life/discount/
Last updated: 2026-10-25

> The discount calculator finds the sale price after a percentage discount and how much you save, with optional sales tax. Type the price you actually paid into the result to find what percentage discount you received.

## Inputs

- Original price
- Discount (%)
- Sales tax (optional) (%)

## Results

- Price after discount — Type the price you paid to find the discount.
- You save

## Formula

```
Sale price = price × (1 − discount %) × (1 + tax %)
Savings = price × discount %
```

## Explanation

Discounts are easy to misjudge, especially when stacked. Two successive 20% discounts give 36% off, not 40%.

### How to use it

Enter the original price and the discount percentage. Add a sales tax rate if it is charged on the discounted price.

### Compare deals

A fixed amount off is better than a percentage off when the price is low; a percentage off wins on expensive items. Calculate both.

### Inputs explained

FieldWhat to enterOriginal priceAmount in your currencyDiscountIn %Sales tax (optional)In %

### What each result means

- **Price after discount** = [Original price] × (1 - [Discount]÷100) × (1 + [Sales tax (optional)]÷100)
- **You save** = [Original price] × [Discount]÷100

### Example values

How the main result changes when **Discount** changes and everything else stays at the example values above:

Discount (%)Price after discount12.510518.7597.5259031.2582.537.5755060

## Worked example

Original price 120 with 25% off.

Savings = 120 × 0.25 = 30. Sale price = **90**.

## Key terms

- **List price**: The original, undiscounted price.
- **Stacked discount**: Applying one discount after another.

## FAQ

**How do I calculate two discounts?**
Multiply: price × (1 − d₁) × (1 − d₂).

**How do I find the discount percentage?**
Type the sale price into the result box.

**Is tax charged before or after discount?**
Usually after, on the reduced price.

**What formula does the Discount Calculator use?**
Sale price = price × (1 − discount %) × (1 + tax %).

**Can I work backwards from the result?**
Yes. Type the result you want into Price after discount and the calculator finds the matching discount.