Free Shopping Discount Calculator
Discount Calculator
Calculate sale price, percentage savings, stacked discounts, effective discount, and estimated final price with sales tax. Enter an original price and discount percentage to instantly see how much you save.
Enter your discount
Enter the original price and discount. You can also add a second discount and an estimated sales tax rate.
Add a second discount or coupon. It is applied after the first discount.
Optional estimate. Sales tax rules vary by state, locality, product, and discount type.
Results
Enter the original price and discount rate to see the results.
Example
A $100 item with 20% off costs $80. If you then apply an additional 10% discount, the price becomes $72.
How to calculate a discount
To calculate a percentage discount, multiply the original price by the discount rate divided by 100. The result is the amount saved.
Subtract the discount amount from the original price to calculate the final sale price before any applicable sales tax.
Discount Formula
Discount Amount = Original Price × (Discount Rate ÷ 100)
Sale Price = Original Price − Discount Amount
Discount calculation example
Suppose an item normally costs $100 and is discounted by 25%. The discount amount is $25, so the sale price before tax is $75.
Original Price: $100
Discount: 25%
Savings: $25
Sale Price: $75
Common percentage discount examples
Percentage-off promotions are common in retail shopping. The examples below show how several common discounts affect a $100 original price.
10% Off
$100 × 10% = $10 savings, so the sale price is $90.
20% Off
$100 × 20% = $20 savings, so the sale price is $80.
30% Off
$100 × 30% = $30 savings, so the sale price is $70.
50% Off
$100 × 50% = $50 savings, so the sale price is $50.
How to find the original price from a sale price
If you know the discounted price and the discount percentage, you can estimate the original price by dividing the sale price by the percentage of the original price that remains.
Original Price Formula
Original Price = Sale Price ÷ (1 − Discount Rate)
For example, if an item costs $80 after a 20% discount, then 80% of the original price remains. Dividing $80 by 0.80 gives an original price of $100.
How stacked discounts work
Stacked discounts are multiple discounts applied one after another. The second discount is normally calculated from the already reduced price rather than the original price.
For example, a $100 item discounted by 20% becomes $80. If another 10% discount is then applied, the second discount is $8, producing a final price of $72.
Original Price: $100
First Discount: 20%
Price After First Discount: $80
Second Discount: 10%
Final Price: $72
Effective Discount: 28%
What is an effective discount?
The effective discount is the actual percentage saved from the original price after all discounts have been applied.
Multiple discounts generally should not be added together directly. For example, 20% off followed by 10% off gives a 28% effective discount rather than 30%.
Effective Discount Formula
Effective Discount (%) = (Total Savings ÷ Original Price) × 100
Discount calculator with sales tax
You can also use the calculator to estimate the final purchase price after a percentage discount and sales tax.
Sales tax rules can vary by state, local jurisdiction, product type, coupon type, retailer promotion, and transaction. The tax field therefore provides a simplified estimate rather than a universal tax calculation.
Need a dedicated sales tax calculation?
Use the Sales Tax Calculator to estimate sales tax and final purchase price from a pre-tax amount.
Sales Tax Calculator →How to calculate how much you save
The amount saved is the difference between the original price and the discounted price. For a single percentage discount, it can also be calculated directly by multiplying the original price by the discount percentage.
Comparing the dollar savings and effective discount percentage can be especially useful when evaluating stacked promotions, coupons, clearance prices, and sale events.
When is a discount calculator useful?
Sale Shopping
Quickly calculate the final price of an item during a percentage-off sale.
Stacked Promotions
Calculate the actual savings when multiple discounts are applied sequentially.
Coupon Comparisons
Compare different percentage-off promotions and determine which offer produces the lowest final price.
Retail Pricing
Compare original prices, promotional prices, effective discounts, and customer savings.
Clearance Sales
Estimate final prices when retailers apply large markdowns or multiple clearance reductions.
Tax Estimates
Estimate a final purchase amount after discounts and an entered sales tax rate.
Related shopping and business calculators
Sales Tax Calculator
Calculate sales tax and final purchase price from a pre-tax amount.
Calculate Sales Tax →Reverse Sales Tax Calculator
Find the original pre-tax price and tax amount from a tax-inclusive total.
Reverse Sales Tax →Profit Margin Calculator
Calculate profit, profit margin percentage, and business profitability from revenue and costs.
Calculate Profit Margin →Markup Calculator
Calculate markup percentage, selling price, profit, and margin.
Calculate Markup →Frequently Asked Questions
How do I calculate a percentage discount?
Multiply the original price by the discount percentage expressed as a decimal. Subtract that savings amount from the original price to find the sale price.
How much is 20% off $100?
A 20% discount on $100 saves $20, so the discounted price is $80 before any applicable sales tax.
How much is 30% off $50?
A 30% discount on $50 saves $15, making the discounted price $35 before any applicable sales tax.
How do I calculate a 25% discount manually?
Multiply the original price by 0.25 to find your savings. For example, 25% of $100 is $25, so the discounted price is $75 before tax.
What does stacked discounts mean?
Stacked discounts are multiple discounts applied one after another. Each additional percentage discount is normally applied to the already reduced price.
Is 20% off plus 10% off the same as 30% off?
No. A 20% discount followed by a 10% discount results in an effective discount of 28%. On a $100 item, the final price would be $72.
How do I calculate two discounts?
Apply the first discount to the original price, then apply the second discount to the reduced price. The two discount percentages generally should not simply be added together.
How do I find the original price before a discount?
Divide the sale price by the portion of the original price that remains after the discount. For example, after a 20% discount, divide the sale price by 0.80.
Does the discounted price include sales tax?
Not automatically. Sales tax treatment depends on the applicable jurisdiction and transaction. Enter a sales tax rate in the calculator if you want a simplified estimate of the final price including tax.
This discount calculator provides simplified estimates for general shopping, business, and informational purposes. Actual prices, promotions, coupon rules, discount eligibility, sales tax treatment, and applicable tax rates may vary by retailer, transaction, and jurisdiction.