Discount Calculator
Free percent off calculator & sale price calculator — find final price, savings, stacked coupons, sales tax, original price, bulk discounts and profit margin instantly
About the Discount Calculator
This free discount calculator doubles as a percent off calculator, sale price calculator, reverse discount calculator, coupon stacking calculator, bulk order discount calculator, and margin-to-price calculator — six of the most commonly searched pricing problems in one tool. Whether you're checking "how much is 20 percent off," working out a double discount at checkout, or setting a wholesale price for your store, this page has a mode built for it.
- Six calculators in one: simple percent off, sales tax / markup, stacked (double) discounts, reverse discount to find the original price, bulk quantity discounts, and margin-to-selling-price.
- See the exact amount saved or added alongside the final price at a glance — no mental math needed.
- Stacked discount calculator applies each percentage to the reduced price — not simply added together, so you always see the true effective discount.
- Visual savings bar shows what portion of the original price you are actually paying.
- Works with decimals for precise currency calculations, in any currency — USD, EUR, GBP, PKR, or any other.
How to Calculate a Discount
To calculate a discount, multiply the original price by the discount percentage divided by 100. Subtract that amount from the original price to get the final price. Example: $50 with 20% off → $50 × 0.20 = $10 saved → Final price $40.
Whether you're shopping at a sale, calculating sales tax on a purchase, setting a selling price for your business, working out a stacked coupon at checkout, or figuring out a bulk order total, the same core formula applies — but the setup changes depending on which value you know and which you're trying to find. People search for this in many different ways: "percent off calculator," "sale price calculator," "how to calculate discount percentage," "20 percent off calculator," or simply "how much is X% off $Y" — this page answers all of them with one tool.
The Six Discount Formulas Explained
1. Simple Discount
Final Price = Price − Discount Amount
Example: $50 at 20% off → $50 × 0.20 = $10 off → Final price $40.
2. Tax / Markup
Final Price = Price + Tax Amount
Example: $100 + 7% sales tax → $100 × 0.07 = $7 tax → Final price $107.
3. Stacked Discounts
Price after D2 = Price after D1 × (1 − D2 ÷ 100)
... and so on
Example: $80 with 30% then 10% off → $80 × 0.70 = $56 → $56 × 0.90 = $50.40. Note: this is not the same as a flat 40% off (which would give $48).
4. Finding the Original Price
Example: An item costs $40 after 20% off → $40 ÷ 0.80 = $50 was the original price.
5. Bulk / Quantity Discount
Discount Amount = Total Before × (Discount % ÷ 100)
Total After = Total Before − Discount Amount
Example: 12 items at $5 each, 15% off → $60 total → $9 off → $51 final.
6. Margin → Selling Price
Profit = Selling Price − Cost Price
Example: Cost $30, desired 25% margin → $30 ÷ 0.75 = $40 selling price, $10 profit.
Quick Percent-Off Reference Chart (Mental Math Shortcuts)
Don't want to open a calculator every time? These are the most-searched discount percentages and the fastest way to work them out in your head.
| Discount | Mental Math Shortcut | Example on $80 |
|---|---|---|
| 10% off | Move the decimal one place left | 10% of $80 = $8 → pay $72 |
| 15% off | Find 10%, add half of that again | $8 + $4 = $12 off → pay $68 |
| 20% off | Find 10%, then double it | $8 × 2 = $16 off → pay $64 |
| 25% off | Divide the price by 4 | $80 ÷ 4 = $20 off → pay $60 |
| 30% off | Find 10%, then triple it | $8 × 3 = $24 off → pay $56 |
| 50% off | Divide the price by 2 | $80 ÷ 2 = $40 off → pay $40 |
| 75% off | Divide by 4, that's what you pay | $80 ÷ 4 = $20 to pay |
How Much Is 20 Percent Off? (Common Price Examples)
One of the most common searches is a specific "X% off $Y" calculation. Here are a few worked examples — for any other price or percentage, just use the Simple Discount mode above.
| Original Price | Discount | You Save | Final Price |
|---|---|---|---|
| $20 | 20% off | $4 | $16 |
| $50 | 20% off | $10 | $40 |
| $100 | 25% off | $25 | $75 |
| $60 | 30% off | $18 | $42 |
| $150 | 40% off | $60 | $90 |
| $200 | 50% off | $100 | $100 |
Are Store Discounts Always Genuine?
Not every advertised markdown reflects a real price cut. In the United States, the Federal Trade Commission requires that a "was" or reference price used in a sale claim be a price at which the item was genuinely offered for a reasonable period of time — not an inflated number invented just to make the discount look bigger.
- Inflated reference price: a tag reading "Was $200, Now $120" is misleading if the item never actually sold at $200.
- Fake urgency: countdown timers or "only today" banners that reset or reappear the next day are a red flag.
- Compare before you buy: use the "Original Price" mode on this page to check whether the claimed discount percentage matches the current sale price and a price you've actually seen the item sell for before.
This is also why a reverse discount calculator (working backward from the sale price) is useful — it lets you sanity-check whether the "original price" printed on a tag is realistic for the discount percentage advertised.
Common Discount Scenarios
| Scenario | Mode to Use |
|---|---|
| Shop sale — 30% off a price tag | Simple Discount |
| Adding sales tax to a purchase | Tax / Markup |
| Coupon on top of an existing sale | Stacked Discounts |
| What was the price before the sale? | Original Price |
| Wholesale order for multiple units | Bulk / Quantity |
| Setting a price to hit a target profit | Margin → Price |
Frequently Asked Questions
About This Tool & Editorial Standards
This discount calculator uses standard retail and financial formulas for discount, tax, margin, and markup calculations. The content on this page is written and reviewed by the Toolriz tools team for accuracy. This tool is provided for general informational purposes only and is not a substitute for professional financial or accounting advice.