---
title: "Discount Calculator — Sale Price, Percent Off, Original Price & Stacked Discounts"
description: "Free discount calculator: find the sale price after a % off, work out what percent off you got, reverse-calculate the original price, and combine stacked discounts. Adds VAT/sales tax by country (US, UK, EU, Australia, Canada)."
url: "https://worldcalculators.org/calculators/discount/"
canonical: "https://worldcalculators.org/calculators/discount/"
---

# Discount Calculator

Free discount calculator: find the sale price after a % off, work out what percent off you got, reverse-calculate the original price, and combine stacked discounts. Adds VAT/sales tax by country (US, UK, EU, Australia, Canada).

## Quick answer

Sale price = Original × (1 − %÷100)  ·  % off = (1 − Sale ÷ Original) × 100  ·  Original = Sale ÷ (1 − %÷100)  ·  Stacked = Original × (1 − D₁÷100) × (1 − D₂÷100). Stacked discounts multiply, they never add — 20% + 10% = 28% off, not 30%.

## How to Calculate a Discount

Formula: Sale price = Original × (1 − Discount% ÷ 100)
Example: a $80 jacket at 25% off = 80 × 0.75 = $60 . You save 80 × 0.25 = $20. Quick mental shortcuts: 10% off = move the decimal one place; 25% off = subtract a quarter; 50% off = halve it.

## Discounts & Tax Around the World

The discount maths is universal, but whether the price you start from already includes tax is not. This changes what "25% off" actually means at the register.

## Frequently Asked Questions

Multiply the original price by (1 − discount÷100). For 25% off $80: 80 × (1 − 0.25) = 80 × 0.75 = $60. The amount you save is 80 × 0.25 = $20. A quick shortcut for 25% off: divide the price by 4 to get the saving, then subtract.
Percent off = (1 − sale price ÷ original price) × 100. If an item was $80 and is now $60: (1 − 60÷80) × 100 = 25% off. The amount saved is $80 − $60 = $20.

## Sources & Methodology

Discount, percent-off, reverse-price and stacked-discount results are computed client-side from the standard formulas shown above. Country tax treatment reflects whether the displayed retail price is tax-inclusive (VAT/GST) or tax-exclusive (US/Canada sales tax).
Standards and figures reviewed June 2026.

Source: https://worldcalculators.org/calculators/discount/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.