# Percent Off Calculator

URL: https://speedycalculator.com/calculators/finance/percent-off/
Last updated: 2026-10-25

> The percent off calculator works out the final price after a percent-off discount – with sales tax – and how much you save, for one or several items.

## Inputs

- Original price
- Percent off (%)
- Quantity
- Sales tax (%)

## Results

- Sale price per item
- Total to pay (with tax)
- You save
- Sales tax

## Formula

```
Sale price = price × (1 − percent off)
With tax = sale price × (1 + tax)
Saving = price − sale price
```

## Explanation

Quick rule: for 20% off, multiply the price by 0.8; for 30% off, by 0.7. Sales tax is charged on the reduced price.

### How to use the Percent Off Calculator

- **Original price**
- **Percent off**
- **Quantity**
- **Sales tax**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the price, the percent off, the quantity and the sales tax.

### Tips

- Know the difference between margin (profit ÷ price) and markup (profit ÷ cost).
- Apply successive discounts one after another – they do not simply add up.
- Check whether prices already include sales tax or VAT.
- Round prices only at the very end of the calculation.

### Common mistakes to avoid

- Adding discount percentages together.
- Pricing from a target margin using the markup formula.
- Forgetting payment-processing and shipping fees.

### Inputs explained

FieldWhat to enterOriginal priceAmount in your currencyPercent offIn %QuantityA numberSales taxIn %

### What each result means

- **Sale price per item** = [Original price]×(1 - [Percent off]÷100)
- **Total to pay (with tax)** = [Sale price per item]×[Quantity]×(1 + [Sales tax]÷100)
- **You save** = ([Original price] - [Sale price per item])×[Quantity]
- **Sales tax** = [Sale price per item]×[Quantity]×[Sales tax]÷100

### Example values

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

Original priceTotal to pay (with tax)2517.537.526.25503562.543.757552.510070

## Worked example

Inputs — Original price: $50; Percent off: 30 %; Quantity: 1; Sales tax: 0 %.

Results — Sale price per item = $35.00; **Total to pay (with tax) = $35.00**; You save = $15.00; Sales tax = $0.00.

## FAQ

**What is 30% off $50?**
$35 – you save $15.

**How do I calculate percent off quickly?**
Multiply by (1 − percentage), e.g. × 0.7 for 30% off.

**Is tax calculated before or after the discount?**
After – on the discounted price.

**What formula does the Percent Off Calculator use?**
Sale price = price × (1 − percent off).