Enter the original price, discount percentage, tax rate, and quantity to see the sale price, savings, and checkout total.
$100.00
Before discount-$20.00
20.0% reduction$80.00
Excluding sales tax$80.00
No tax addedSale price = Original price × (1 − Discount rate)A discount calculator converts the percent off into a decimal, subtracts that share from the original price, then applies quantity and optional sales tax to estimate the checkout total.
| Symbol | Variable | Description |
|---|---|---|
| Original price | Original price | The price before any sale, coupon, or markdown is applied. |
| Discount rate | Discount percentage | The percent off entered as a decimal in the formula, such as 0.25 for 25% off. |
| Sale price | Sale price | The discounted price before optional tax and quantity. |
Enter the original price
Use the regular price before the sale or coupon. For a $120 item, enter 120.
Add the discount percentage
Enter the percent off shown by the store, such as 15, 25, or 40.
Include tax and quantity if needed
Sales tax and quantity are optional, but they make the final total closer to what you will pay.
Read the savings and total
The result separates sale price, savings, discounted subtotal, tax, and final total so you can check each part.
A discount is a price reduction expressed as a percentage of the original price. If an item is 30% off, you save 30% of the original price and pay the remaining 70% before tax.
Use these examples to sanity-check sale tags and coupon math before checkout.
| Original price | Discount | Sale price | Savings |
|---|---|---|---|
| $100 | 10% | $90.00 | $10.00 |
| $80 | 25% | $60.00 | $20.00 |
| $250 | 40% | $150.00 | $100.00 |
| $45 | 15% | $38.25 | $6.75 |
| $120 | 50% | $60.00 | $60.00 |
Retail items frequently end in .99. Use this quick reference matrix to instantly check common sale tags without manual calculation:
| Tag Price | 15% Off (Pay / Save) | 20% Off (Pay / Save) | 25% Off (Pay / Save) | 30% Off (Pay / Save) | 50% Off (Half Price) |
|---|---|---|---|---|---|
| $19.99 | $16.99 (Save $3.00) | $15.99 (Save $4.00) | $14.99 (Save $5.00) | $13.99 (Save $6.00) | $10.00 (Save $9.99) |
| $29.99 | $25.49 (Save $4.50) | $23.99 (Save $6.00) | $22.49 (Save $7.50) | $20.99 (Save $9.00) | $15.00 (Save $14.99) |
| $49.99 | $42.49 (Save $7.50) | $39.99 (Save $10.00) | $37.49 (Save $12.50) | $34.99 (Save $15.00) | $25.00 (Save $24.99) |
| $69.99 | $59.49 (Save $10.50) | $55.99 (Save $14.00) | $52.49 (Save $17.50) | $48.99 (Save $21.00) | $35.00 (Save $34.99) |
| $99.99 | $84.99 (Save $15.00) | $79.99 (Save $20.00) | $74.99 (Save $25.00) | $69.99 (Save $30.00) | $50.00 (Save $49.99) |
When stores apply multiple promotions or coupons, they usually apply the second discount to the already reduced price rather than adding percentages together.
The final total is an estimate because stores may round at the item level, apply coupons in a specific order, exclude some items from a promotion, or use a different local sales tax rule.
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