Discount Calculator
Find the sale price and savings after a percent discount, stack a second discount, add sales tax, or work out the discount percent from two prices. Example: $80 with 25% off is $60, saving $20.
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Show steps
How to use the Discount Calculator
- Choose whether you want a sale price or a discount percent.
- Enter the original price and the discount, plus any extra discount and tax.
- Press Calculate.
Formula and method
Sale price = original price x (1 – discount%). Savings = original – sale. Discount % = (original – sale) / original x 100. Stacked discounts multiply: (1 – d1) x (1 – d2).
Worked example: $80 at 25% off
| Step | Result |
|---|---|
| Discount (80 x 25%) | $20.00 |
| Sale price (80 – 20) | $60.00 |
| With 8% sales tax | $64.80 |
Discount chart for a $100 item
| Discount | Sale price | You save |
|---|---|---|
| 5% | $95 | $5 |
| 10% | $90 | $10 |
| 15% | $85 | $15 |
| 20% | $80 | $20 |
| 25% | $75 | $25 |
| 30% | $70 | $30 |
| 40% | $60 | $40 |
| 50% | $50 | $50 |
| 60% | $40 | $60 |
| 75% | $25 | $75 |
Stacking discounts
When a store takes 20% off and then an extra 10% off, you pay 90% of 80%, which is 72% of the original. That is a 28% total discount.
Frequently asked questions
How do I calculate a discount?
Multiply the price by the discount percent and subtract it from the price.
How do I find the discount percent?
Subtract the sale price from the original and divide by the original.
What is 20% off $50?
$40.
Do two discounts add up?
No, they multiply.
Is tax charged before or after the discount?
Usually after the discount, on the sale price.
What is 30% off $120?
$84.
Sources
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