Percent Off Calculator
Calculate final price, total savings, and tax after one or two percentage discounts.
Discount Breakdown
What Is the Percent Off Calculator?
The percent off calculator shows what a discounted item really costs before you reach the register. Enter the original price and discount percentage to get the sale price, the amount you save, and your effective savings rate. It also handles the two situations that trip shoppers up most: a second discount stacked on the first, and sales tax added at checkout.
How to Use
- Enter the original price of the item before any discount.
- Enter the first discount percentage shown on the tag or ad.
- If the store takes an extra percentage off the reduced price (common at clearance events), enter it in Additional Discount %.
- If the purchase is taxable, enter your local tax rate to see the true out-the-door total.
- Click Calculate for the full breakdown, including total savings and effective savings percentage.
The Percent Off Formula
Every percent off calculation comes down to one formula:
Sale price = Original price × (1 − Discount % ÷ 100)
- Original price — the listed price before any markdown.
- Discount % — the percentage being taken off (for 30% off, use 30).
- Sale price — the amount you pay before any sales tax.
The parenthesized term is the share you still pay: at 30% off, you pay 70% of the original. Savings are the mirror image, Savings = Original price × Discount % ÷ 100, and two successive discounts multiply: Final price = Original price × (1 − D1 ÷ 100) × (1 − D2 ÷ 100). Our percentage calculator handles the reverse — finding the percentage from two known prices.
Worked Example: 30% Off $79.99
A jacket is marked $79.99 with a 30% off tag:
- Convert the discount to a decimal: 30 ÷ 100 = 0.30.
- Subtract from 1 to find the share you still pay: 1 − 0.30 = 0.70.
- Multiply by the original price: $79.99 × 0.70 = $55.993, which displays as $55.99.
- Your savings: $79.99 − $55.993 = $23.997, displayed as $24.00.
The calculator rounds only for display, which is why the savings line shows $24.00 rather than $23.99.
Percent Off Reference Table
Final prices before tax at the most common discount levels:
| Discount | $25.00 item | $50.00 item | $75.00 item | $100.00 item | $200.00 item |
|---|---|---|---|---|---|
| 10% off | $22.50 | $45.00 | $67.50 | $90.00 | $180.00 |
| 15% off | $21.25 | $42.50 | $63.75 | $85.00 | $170.00 |
| 20% off | $20.00 | $40.00 | $60.00 | $80.00 | $160.00 |
| 25% off | $18.75 | $37.50 | $56.25 | $75.00 | $150.00 |
| 30% off | $17.50 | $35.00 | $52.50 | $70.00 | $140.00 |
| 40% off | $15.00 | $30.00 | $45.00 | $60.00 | $120.00 |
| 50% off | $12.50 | $25.00 | $37.50 | $50.00 | $100.00 |
The same jump matters more on bigger tickets: moving from 20% to 40% off saves an extra $40 on a $200 item but only $5 on a $25 item.
Stacked Discounts: Why 20% + 10% Is Not 30% Off
Clearance events love to advertise "take an extra 10% off already-reduced prices." The key word is reduced: the second percentage applies to the discounted price, not the original. Run it on a $100 item:
- First discount: $100 × (1 − 0.20) = $80.
- Extra discount: $80 × (1 − 0.10) = $72.
- Effective savings: $28 off $100, a 28% discount — not the 30% you get by adding 20% + 10%.
A true 30% off would price it at $70, and the gap widens as percentages grow: "50% off, plus an extra 50% off" still leaves $25 of a $100 item. The combined rate of two stacked discounts is 1 − (1 − D1 ÷ 100) × (1 − D2 ÷ 100); enter both percentages above, or use our discount calculator for fixed-dollar coupons.
Sales Tax After the Discount
In most US states, sales tax is charged on the price you actually pay — after discounts, not before — so the discount shrinks the tax bill too. Take an $80 pair of shoes at 25% off with an 8% sales tax:
- Discounted price: $80 × 0.75 = $60.00.
- Tax on the discounted price: $60.00 × 0.08 = $4.80.
- Out-the-door total: $60.00 + $4.80 = $64.80.
Tax on the full $80 would have been $6.40, so discount-first ordering saves $1.60 of tax on top of the $20 discount. Enter your local rate above for the real total, or use the sales tax calculator for tax-only questions.
BOGO Deals: The Hidden Percent Off
"Buy one, get one 50% off" sounds like half off, but the math says otherwise. When both items cost the same, you pay full price for one and half price for the second — 1.5 times the single-item price for two. Two $40 shirts cost $40 + $20 = $60 instead of $80: a saving of $20 on $80, exactly 25% off the pair, not 50%.
Two catches shrink it further: most stores discount the cheaper item, so mixing prices drops the rate below 25% (a $40 item paired with a $20 item saves $10 on $60, about 16.7%), and the deal only pays off if you wanted two items in the first place. "Buy one, get one free," by contrast, genuinely is 50% off two equal-priced items.
Frequently Asked Questions
How do you calculate percent off?
Multiply the original price by (1 − discount ÷ 100). For 25% off a $60 item: $60 × 0.75 = $45. The amount saved is the original price times the percentage: $60 × 0.25 = $15.
How are stacked discounts calculated?
The second discount is applied to the already-reduced price, not the original price. A $100 item at 20% off falls to $80; an extra 10% off then removes $8, leaving $72 — an effective 28% discount, not 30%.
Is tax calculated before or after discount?
After. Tax is calculated on the final discounted price, which is standard in most jurisdictions. For example, 25% off an $80 item leaves $60, and 8% tax on that brings the total to $64.80.
Is buy-one-get-one 50% off the same as 50% off?
No. With two equal-priced items you pay 1.5 times the single price for the pair — 25% off, so two $40 items cost $60 instead of $80. The rate drops further when the second item is cheaper, since stores discount the lower-priced one.
What is effective savings percentage?
It is the total amount saved divided by the original price, as a percentage. It reveals the true discount on stacked deals: 20% off plus an extra 10% off works out to an effective savings of 28%.
How can I estimate a percent off discount in my head?
Move the decimal point one place left for 10% — 10% of $79.99 is about $8.00 — then double it for 20%, triple it for 30%, halve it for 5%. For 30% off $79.99: 3 × $8 = $24 off, so you pay roughly $56; the exact figure is $55.99.
Can I use this for currency other than USD?
Yes, simply interpret the $ symbol as your local currency. The math works the same way for euros, pounds, yen, or any other currency, because percentages are currency-independent.