Discount Calculator
Enter an original price and a discount percentage to instantly find the sale price, discount amount, and savings.
Calculated locally in your browser.
How to use
- Original price — enter the full price before the discount.
- Discount (%) — enter the discount percentage (0–100).
- Tax rate (optional) — add a sales tax or VAT rate to calculate the final price after tax.
- Results update instantly as you type — no button press required.
Examples
- 20% off $100: Discount = $20, Final price = $80
- 15% off $49.99: Discount = $7.50, Final price = $42.49
- 50% off $250 with 8.5% tax: After discount = $125, Tax = $10.63, Final = $135.63
Formula
- Discount amount = Original price × (Discount% / 100)
- Final price = Original price − Discount amount
- After tax = Final price × (1 + Tax% / 100)
Quick Discount Reference Table
Common percentage discounts calculated across popular retail price points:
| Original Price | 10% Off (Save) | 20% Off (Save) | 30% Off (Save) | 50% Off (Save) |
|---|---|---|---|---|
| $20.00 | $18.00 ($2.00) | $16.00 ($4.00) | $14.00 ($6.00) | $10.00 ($10.00) |
| $50.00 | $45.00 ($5.00) | $40.00 ($10.00) | $35.00 ($15.00) | $25.00 ($25.00) |
| $100.00 | $90.00 ($10.00) | $80.00 ($20.00) | $70.00 ($30.00) | $50.00 ($50.00) |
| $200.00 | $180.00 ($20.00) | $160.00 ($40.00) | $140.00 ($60.00) | $100.00 ($100.00) |
Frequently Asked Questions
Does this discount calculator support different currency symbols?
Yes. The calculator operates on raw decimal values, making it universally compatible with any currency (USD $, EUR €, GBP £, IDR Rp, JPY ¥, etc.).
How do I find the original price before the discount (Reverse Discount)?
Divide the sale price by (1 − Discount% / 100). For example, if a jacket is on sale for $80 after a 20% discount: Original Price = $80 ÷ (1 − 0.20) = $80 ÷ 0.80 = $100.
How do I calculate stacked discounts (e.g. 20% off plus an extra 10% coupon)?
Retailers do not combine percentages into 30%. The first 20% discount is applied to the original price ($100 becomes $80), and the 10% coupon is applied to the already discounted subtotal ($80 − $8 = $72). The actual effective savings is 28%.
Is sales tax calculated before or after the discount?
In standard consumer commerce across almost all jurisdictions, sales tax or VAT is legally assessed on the final discounted price paid by the customer, not on the original sticker price.
How do 'Buy One Get One' (BOGO) deals translate into percentage discounts?
A classic 'Buy One Get One Free' (BOGO) promotion equals an effective 50% discount across two identical items. A 'Buy One Get One 50% Off' deal represents an effective 25% discount across the combined pair.
Can I enter decimal discounts like 12.5% or 33.33%?
Yes. The discount input accepts precise decimal fractions (such as 7.5%, 12.5%, or 33.33%), calculating exact savings to two decimal places.
What is the Excel or Google Sheets formula to calculate a discount?
To find the final price in Excel: `=A2*(1 - B2)` where cell A2 is the original price and B2 is formatted as a percentage. If B2 is an integer like 20, use `=A2*(1 - B2/100)`.
Is my shopping or price data sent to any server?
No. All arithmetic computations execute 100% client-side in your device's browser memory. Zero pricing or shopping data is transmitted, cached, or logged.