About this Discount Calculator
Whether it's Black Friday or a clearance rack, calculating the final price in your head can be tricky. This tool helps you find the final price after applying a percentage discount, and can even add the sales tax for an 'out-the-door' total.
Who this calculator is for
- Shoppers who want to know the real price after a markdown or coupon.
- Deal hunters comparing how much they will actually save on a sale item.
- Anyone adding tax after a discount and wanting the total before checkout.
When to use it
- Calculate the sale price after a percentage discount.
- See how much money you save on a marked-down item.
- Estimate the final checkout total after tax.
How to use this calculator
- Enter the Original Price on the tag.
- Enter the Discount percentage (e.g., 20 for 20% off).
- Optionally enter the Sales Tax rate for your area.
- See the Final Price and total You Save.
Key assumptions
- The discount is applied to the original listed price.
- Sales tax is calculated on the discounted price, not the original price.
- This does not model stacked coupons or store-specific promotion rules.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
1. Discount Amount = Original Price × (Discount% / 100)
2. Price After Discount = Original Price - Discount Amount
3. Tax Amount = Price After Discount × (Tax% / 100)
4. Final Price = Price After Discount + Tax Amount
Inputs explained
Original Price
The pre-sale price listed on the item.
Discount %
The percentage deducted from the price.
Sales Tax %
The tax rate applied to the transaction. Tax is calculated on the discounted price, not the original price.
Understanding your results
The You Save amount shows the raw dollars kept in your pocket. The Final Price is exactly what you will pay at the register.
Example scenarios
Clothing Sale
Shirt $50. Discount 30%. Tax 0%. Savings $15. Final Price $35.
Big Ticket
TV $1,000. Discount 20%. Tax 8%. Price after discount $800. Tax $64. Final Price $864.
Key Features
- Tax Integration
- Instant Savings Calculation
- Mobile Friendly
Tips & Best Practices
- To calculate a 20% tip, calculate 10% (move decimal left once) and double it.
- Stacking coupons? Usually, you apply the % off first, then dollar-off coupons, but store policies vary.
Glossary of Terms
- Markdown
- A reduction in price, usually to clear inventory.
- Gross Price
- The total price including tax.