Discount Calculator
Calculate sale prices, savings, and final cost after single or stacked discounts with optional tax. Free and instant.
About Discount Calculator
Shopping sales, coupon stacking, and clearance events all require quick discount math. This calculator handles single and multiple stacked discounts, adds optional sales tax, and shows exactly how much you save so you can make confident purchasing decisions.
Single Discount Calculation
Enter the original price and a discount percentage to instantly see the discounted price and the dollar amount you save. This covers the majority of everyday shopping scenarios from store-wide sales to online coupon codes.
Stacked Discounts
Many retailers let you combine an employee discount, a coupon, and a sale. Use the add discount feature to stack multiple percentage discounts in sequence. The calculator applies each one to the running total, showing the cumulative effect and total savings.
Tax Integration
Enable the optional tax field to see the true final cost after both discounts and sales tax are applied. Tax is calculated on the post-discount price, which matches how most retail transactions work.
Practical Examples
- A $150 jacket at 30% off costs $105, saving you $45
- A $200 item with 20% off plus an extra 10% off coupon costs $144, saving $56
- Quickly compare whether a 25% single discount beats two stacked 15% and 10% discounts
All math happens in your browser instantly. Bookmark this page and use it while shopping online or in-store to always know exactly what you will pay.
Frequently Asked Questions
How do stacked discounts work?
Stacked (or sequential) discounts are applied one after another to the running total, not added together. For example, a 20% discount followed by a 10% discount on a $100 item gives $100 x 0.80 = $80, then $80 x 0.90 = $72. The combined effect is 28% off, not 30%.
Is tax applied before or after the discount?
In most retail situations, tax is applied to the discounted price. This calculator follows that convention by computing the discount first and then adding the tax percentage to the reduced price.
Can I calculate a buy-one-get-one (BOGO) deal?
For a BOGO 50% off deal on two identical items, enter the combined price as the original price and 25% as the discount (since 50% off one of two items is effectively 25% off the total). The calculator will show your final cost.
Why does the result differ from adding the discount percentages together?
Each successive discount is applied to a smaller base amount, not the original price. Mathematically, two discounts of A% and B% result in a combined discount of (1 - (1 - A/100)(1 - B/100)) x 100, which is always less than A + B when both are positive.