Finance Guide

How to Calculate Discounts: Percentage Off Explained

A discount reduces the original price by a stated percentage. This guide shows the exact formulas to compute discount amount and final price fast.

By Sarah J. Williams | Updated: 2026 | Category: Finance | Reading Time: 6 minutes

Try the tool: Discount Calculator →

Discount Formula

Use these two steps every time:

Discount Amount = Original Price x (Discount % / 100)

Final Price = Original Price - Discount Amount

Inline explainer for Discount Formula.
Inline visual supporting the section on Discount Formula.

Discount Chart (Quick Reference)

Discount You Pay
10% off 90% of price
20% off 80% of price
25% off 75% of price
30% off 70% of price
40% off 60% of price
50% off 50% of price

Examples

Example 1

Original price: $80
Discount: 25%
Final price: $60

Example 2

Original price: $150
Discount: 40%
Final price: $90

Related tools: Discount Calculator, Percentage Calculator, and Sales Tax Calculator.

Use the NerdCalc Discount Calculator

Enter the original price and discount percent to get the final sale price instantly.