Discount Calculator
Find the sale price and your savings, including a second discount and sales tax.
Results
| Item | Value |
|---|
Quick Answer
To find a sale price, multiply the price by (1 − discount ÷ 100). A $80 item at 25% off costs $60. With an extra 10% off, it costs $54, because the second discount applies to the reduced price. That is a total discount of 32.5%, not 35%.
Embed this calculator
Adjust the size if needed, then copy the code below into your page or blog. The calculator will load in an iframe and stay updated automatically.
Table of Contents
- Discount Calculator
- Quick Answer
- Related Calculators
- How This Discount Calculator Works
- How to Use the Discount Calculator
- Core Formulas
- Worked Example
- Real-Life Examples
- Percent Off vs Dollars Off
- Sale Prices for Common Discounts
- Shopping Tips
- Common Mistakes to Avoid
- Frequently Asked Questions
- References & Sources
How This Discount Calculator Works
Enter a price and a discount to see the sale price and your savings. You can add a second discount, such as a coupon on a sale item, and sales tax.
Quick explanation: sale price = price × (1 − discount ÷ 100).
- Extra discount: taken off the already reduced price.
- Sales tax: added after the discounts.
- Total discount: your real percentage saving.
How to Use the Discount Calculator
- Enter the original price.
- Enter the discount percentage, such as 25 for 25% off.
- If you have a second discount, such as a coupon on a sale item, enter it as the extra discount.
- Optionally, enter your sales tax rate.
- Press Calculate to see the sale price, your savings, the real total discount and the final price.
Core Formulas
- Sale price: P × (1 − d₁) × (1 − d₂)
- Savings: P − sale price
- Total discount: savings ÷ P × 100
- Final price: sale price × (1 + tax rate)
Worked Example
A $150 jacket is 40% off.
- Sale price = 150 × 0.60 = $90
- You save $60
- With 7% sales tax, the final price is $96.30
Real-Life Examples
- Sale plus coupon: a $120 coat at 30% off is $84. A 15% coupon on top brings it to $71.40, a total saving of 40.5%, not 45%.
- Buy one, get one 50% off: two $40 items cost $40 + $20 = $60 instead of $80. That is 25% off the pair.
- Shopping on a budget: a $649 TV at 20% off is $519.20. With 7% sales tax, the final price is $555.54.
- Store credit check: to see if a deal is real, compare the final price with what other stores charge, not just the percentage.
Percent Off vs Dollars Off
- Percent off: saves more on expensive items. 20% off $150 saves $30.
- Dollars off: saves more on cheaper items. $20 off a $60 item is 33.3% off.
- Break-even point: $20 off and 20% off save the same at a $100 price. Above $100, the percentage wins.
- Read the rules: some coupons need a minimum spend or cannot be combined.
Sale Prices for Common Discounts
Sale price before tax.
| Discount | $25 item | $50 item | $100 item | $200 item |
|---|---|---|---|---|
| 10% off | $22.50 | $45.00 | $90.00 | $180.00 |
| 15% off | $21.25 | $42.50 | $85.00 | $170.00 |
| 20% off | $20.00 | $40.00 | $80.00 | $160.00 |
| 25% off | $18.75 | $37.50 | $75.00 | $150.00 |
| 30% off | $17.50 | $35.00 | $70.00 | $140.00 |
| 40% off | $15.00 | $30.00 | $60.00 | $120.00 |
| 50% off | $12.50 | $25.00 | $50.00 | $100.00 |
| 70% off | $7.50 | $15.00 | $30.00 | $60.00 |
Shopping Tips
- Stacked discounts: they do not simply add together.
- Compare final prices: a bigger percentage on a higher price may still cost more.
- Shipping: delivery costs can reduce your real savings.
Common Mistakes to Avoid
- Adding stacked discounts. 30% plus 20% off is 44% off, not 50%.
- Forgetting tax and shipping. They can take away much of the saving.
- Trusting the original price. Some stores raise the list price before a sale.
- Buying more to save more. A discount only helps if you needed the item.
- Mixing up percent off and percent of. 25% off $80 is $60, but 25% of $80 is $20.
Frequently Asked Questions
Multiply the price by the discount percentage, then subtract it from the price.
The discount is $10, so the sale price is $40.
No. The second discount applies to the reduced price, so the total is 32.5%.
It is usually worked out on the discounted price, though rules can vary.
Divide the amount saved by the original price, then multiply by 100.
Multiply the price by 0.70. For example, 30% off $90 is $63.
Divide the sale price by (1 − discount ÷ 100). A $60 item at 25% off was $60 ÷ 0.75 = $80.
If both items cost the same, it is 25% off the total for the two items.
Find 10% by moving the decimal point one place left, then multiply. For 30% off $70, 10% is $7, so the discount is $21 and the price is $49.
No. 40% off and then 20% off leaves 0.6 × 0.8 = 0.48 of the price, which is 52% off in total.
Stores set their own order. Percentage discounts give the same result in any order, but a dollar coupon saves more when it comes after the percentage discount. On $100, 20% off then $10 off is $70, while $10 off then 20% off is $72.
References & Sources
| Source | Used For | Link |
|---|---|---|
| Wikipedia, Percentage | Percentage calculations. | https://en.wikipedia.org/wiki/Percentage |