Discount Calculator
Calculate the final price after discount, the amount you save, and the discount percentage. Perfect for shopping, comparing sales, or determining the original price when you know the sale price and discount percentage. Save money and shop smarter.
What Is a Discount?
A discount is a reduction in the original price of a product or service. Discounts are typically expressed as a percentage off the original price (e.g., "20% off") or as a fixed amount (e.g., "$10 off"). Understanding how discounts work helps you make informed purchasing decisions and compare deals effectively.
This calculator supports three calculation modes:
- Sale Price: Calculate the final price after applying a discount percentage to the original price.
- Original Price: Determine the original price when you know the sale price and the discount percentage.
- Discount Percentage: Find the discount percentage when you know both the original price and the sale price.
How Does the Discount Calculator Work?
The calculator uses these standard formulas:
Sale Price = Original Price × (1 − Discount % ÷ 100)
Savings Amount = Original Price − Sale Price
Discount Percentage = (Original Price − Sale Price) ÷ Original Price × 100
Original Price = Sale Price ÷ (1 − Discount % ÷ 100)
For example: A $100 item with a 20% discount results in a sale price of $80, savings of $20, and a discount percentage of 20%.
Why Use This Discount Calculator?
- Three Modes: Calculate sale price, original price, or discount percentage.
- Multiple Currencies: Supports USD, EUR, GBP, and more.
- Tax Calculation: Optionally add sales tax to the final price.
- Visual Breakdown: A chart shows the price breakdown and a detailed table shows the calculation steps.
- Free & Private: No registration, no data storage.
Smart Shopping Tips
- Compare Final Prices: A 50% discount on an inflated price might be worse than 20% off a fairly priced item. Always compare final prices, not discount percentages alone.
- Sequential Discounts: A "20% off" coupon applied to an already 30% off item equals 44% off (not 50% off), because discounts apply sequentially, not additively.
- Factor in Tax and Shipping: Don't forget to factor in sales tax and shipping costs when comparing final prices. A higher discount might still result in a higher out-of-pocket cost.
- BOGO Deals: "Buy one get one 50% off" means you pay full price for the first item and 50% off the second. For two $50 items: $50 + $25 = $75 total, which is equivalent to 25% off both items combined.
❓ Discount Calculator FAQ
How do I calculate a 20% discount?
Multiply the original price by 0.20 to find the savings, then subtract from the original price. Example: $50 × 0.20 = $10 savings; $50 − $10 = $40 final price. Or simply multiply by 0.80: $50 × 0.80 = $40.
What does "buy one get one 50% off" mean?
You pay full price for the first item and 50% off the second. For two $50 items: $50 + $25 = $75 total, which is equivalent to 25% off both items combined.
Is a higher discount always better?
Not necessarily. A 50% discount on an inflated price might be worse than 20% off a fairly priced item. Always compare final prices, not discount percentages alone.
How do I calculate the original price after a discount?
Divide the sale price by (1 - discount percentage ÷ 100). Example: $80 sale price with 20% discount: $80 ÷ 0.80 = $100 original price.
What's the difference between discount and markup?
Discount reduces the price from original to sale price. Markup increases cost to selling price. A 25% discount requires a 33.3% markup to return to original price.
How do sequential discounts work?
When multiple discounts are applied, they are applied sequentially, not additively. A "20% off" coupon applied to an already 30% off item equals 44% off (not 50% off).
Should I factor in sales tax when comparing discounts?
Yes. Don't forget to factor in sales tax and shipping costs when comparing final prices. A higher discount might still result in a higher out-of-pocket cost if shipping is expensive.
What is the formula for calculating discount percentage?
Discount Percentage = (Original Price − Sale Price) ÷ Original Price × 100. Example: ($100 − $80) ÷ $100 × 100 = 20%.
How do I calculate the sale price from a discount percentage?
Sale Price = Original Price × (1 − Discount % ÷ 100). Example: $100 × (1 − 0.20) = $80.
What is the savings amount when I get a discount?
Savings Amount = Original Price − Sale Price. Example: $100 − $80 = $20 saved.
How do I calculate a 10% discount?
Multiply the original price by 0.10 to find the savings. Example: $50 × 0.10 = $5 savings; $50 − $5 = $45 final price. Or multiply by 0.90: $50 × 0.90 = $45.
What is the difference between a discount and a coupon?
A discount is a general price reduction, while a coupon is a specific offer that provides a discount when presented. Coupons often have terms like "20% off your next purchase" or "$5 off $25 or more."
How do I calculate the original price from a sale price and discount percentage?
Original Price = Sale Price ÷ (1 − Discount % ÷ 100). Example: $80 ÷ 0.80 = $100.
What is the difference between a percentage discount and a dollar discount?
A percentage discount reduces the price by a percentage (e.g., 20% off). A dollar discount reduces the price by a fixed amount (e.g., $10 off). This calculator primarily focuses on percentage discounts.
How do I calculate the discount percentage if I know the original and sale prices?
Discount Percentage = (Original Price − Sale Price) ÷ Original Price × 100. Example: ($100 − $80) ÷ $100 × 100 = 20%.
What is the total cost of an item after discount and tax?
Total Cost = Sale Price + (Sale Price × Tax Rate ÷ 100). This calculator includes an optional tax rate field to help you calculate the final out-of-pocket cost.
How do I compare two discounts?
Calculate the final price for each discount using the same original price, then compare the final prices. The discount that gives the lowest final price is the better deal. You can use this calculator to compare different discount percentages.
What is a "stacked" discount?
A stacked discount is when multiple discounts are applied to the same item, such as a store discount combined with a manufacturer coupon. Stacked discounts are applied sequentially, not additively.
How accurate is this discount calculator?
This calculator provides accurate results based on standard discount formulas. The decimal precision can be adjusted to suit your needs. For tax calculations, use your local tax rate.