Discount Calculator
Calculate sale price and savings from a percentage or fixed discount.
How to use this tool
- Enter original price and discount (percent or fixed).
- Optionally add tax rate.
- Click Calculate for savings and final price.
- Toggle reverse mode to find the original price.
How it works
Savings = price x discount/100; final = price - savings; tax applied afterwards if set. Reverse mode divides the sale price by (1 - discount/100).
Tips
- Stacked discounts multiply, they don't add — 30% + 20% is 44% off, not 50%.
- Compare final (post-tax) prices when shopping across regions.
Limitations
Assumes tax applies after discount; some jurisdictions compute differently.
Frequently asked questions
How do you compute percent off?
Savings = original price x discount%. Final = original - savings. Optionally add tax to the final.
How do I find the original price from a sale price?
Divide the sale price by (1 - discount%) — the calculator's reverse mode does this.
Can I add sales tax?
Yes — enter a tax rate and it applies to the discounted price.