Discount Calculator
Calculate the final price after one or more discounts — percentage-off, fixed-dollar, or BOGO deals.
Interactive Discount Calculator
Result
Use this free discount calculator to figure out the final price after one or more discounts — percentage-off, fixed-dollar coupons, or buy-one-get-one deals.
How to use this discount calculator
Enter the original price, then add one or more percentage discounts or fixed-dollar coupons. The tool applies them in the correct order and returns the dollar savings, the effective discount percentage, and the final price including any sales tax.
Worked example: $100 item with 30% + 20% off
The classic “double discount” trap:
- Original price: $100
- First discount (30% off): $100 → $70
- Second discount (20% off): $70 → $56
- Total dollar savings: $44
- Effective discount: 44%, not 50%
The headline “30% + 20% off” suggests 50% off but delivers 44%. Sequential percentage discounts multiply, not add. This is correct math; the marketing just adds the percentages to make the deal sound better.
Worked example: $80 item with 25% off + $10 coupon
Order matters with mixed discounts. Apply percentage first, then subtract the fixed amount:
- 25% off $80: $80 × 0.75 = $60
- Subtract $10 coupon: $60 − $10 = $50
- Final price: $50
- Effective discount: $30 / $80 = 37.5%
Reversing the order: $10 off first = $70, then 25% off = $52.50. The savings differ by $2.50 depending on order. The calculator applies percentage first by default, which is the most common convention.
Worked example: BOGO free on two $25 items
“Buy one, get one free” is effectively 50% off:
- Two items at $25 = $50 list
- BOGO free: pay for one = $25
- Effective discount: 50% (you saved $25)
A “Buy one, get one 50% off” deal is different:
- Two items at $25 = $50 list
- 50% off second: pay $25 + $12.50 = $37.50
- Effective discount: 25% (you saved $12.50)
The structure matters. The calculator handles BOGO structures explicitly.
Sequential discount formula
For multiple percentage discounts, the formula is:
final = original × (1 − d1) × (1 − d2) × ... × (1 − dn)
Where d is each percentage expressed as a decimal. For three discounts of 30%, 20%, and 10%, the effective discount is 1 − (0.7 × 0.8 × 0.9) = 1 − 0.504 = 49.6%, not 60%.
For percentage + fixed-dollar combinations, apply percentage first, then subtract the fixed amount. The order changes the result.
Tips for evaluating deals
- Compute the effective discount, not the headline. A 50% + 20% off deal is 60%, not 70%. Always check the math.
- Compare to typical prices, not MSRP. Use price trackers like CamelCamelCamel, Honey, or Google Shopping to see historical prices. Many “MSRP” prices are inflated.
- Stack coupons in the right order. Most stores apply store discounts first, then manufacturer coupons, then loyalty discounts. Check the receipt.
- Account for sales tax. Sales tax is added on the post-discount price in most jurisdictions. The calculator handles this if you enter a tax rate.
- Beware conditional discounts. “20% off when you spend $100” only applies if you meet the threshold. Buying extra to hit it rarely saves money.
Common misleading practices
- Inflated reference prices. Setting a high “original” price then immediately discounting to the actual market price. Reference pricing laws in some states restrict this.
- “Up to X% off” claims. The “up to” qualifier usually means a few items are deeply discounted; most are not.
- Conditional BOGO. “Buy one, get one 50% off” sounds like BOGO but is actually a 25% discount.
- Loyalty pricing that excludes sales. Some stores exclude sale items from additional loyalty discounts. Read the fine print.
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| Step | Operation | Price after | Effective discount |
|---|---|---|---|
| Start | Original price | $100.00 | 0% |
| Apply 50% off | $100 × (1 − 0.50) | $50.00 | 50% |
| Apply additional 20% off | $50 × (1 − 0.20) | $40.00 | 60% total |
| Add $10 fixed coupon | $40 − $10 | $30.00 | 70% total |
| Apply 8% sales tax | $30 × 1.08 | $32.40 | Total paid |
Compare your options
Two methods, three minutes. The honest trade-off table.
This discount calculator
- + Handles sequential discounts in the correct order.
- + Supports percentage-off, fixed-dollar, and BOGO.
- + Shows effective discount and dollar savings side by side.
- − Cannot factor in store-specific loyalty tiers.
Retailer's promotion tool
- + Built into POS and e-commerce platforms.
- + Handles complex rule sets automatically.
- − Restricted to that retailer's products.
- − Often hides the true discount behind conditional logic.
Browser extension (Honey, Capital One Shopping)
- + Automatically finds and applies coupon codes.
- + Tracks price history across retailers.
- − Tracks browsing data and product interests.
- − Not all coupons work; some expire.
Who actually uses Discount Calculator?
Five concrete situations pulled from real sessions, with the exact inputs people paste in.
Know the actual final price before checkout.
Enter the original price and the discount percentage. The tool returns the dollar amount off, the final price, and the effective percentage saved. Useful when stores advertise a confusing chain of discounts.
Apply multiple coupons in the right order.
Enter a 20% off code plus a $10 off coupon. The tool applies them sequentially and shows the final price — and warns about the order, which matters for percentage + fixed combinations.
See how different discount levels affect revenue and margin.
Run the same item at 10%, 20%, 30%, and 50% off. The tool shows the final price, the margin remaining, and the breakeven volume needed to recover the same gross profit.
Compare discounts across multiple suppliers.
Enter each vendor's quoted price and any tier discounts. The tool returns effective unit cost, including volume rebates and freight terms.
Verify that the discount is genuine.
Check the original price on a price tracker. If the 'sale' price matches a typical sale price, it's a real discount. If it matches the historical average, it isn't. The calculator helps quantify the actual saving.
A discount calculator that handles sequential markdowns, fixed coupons, and BOGO — in the right order
Stores stack discounts to make the total sound larger than it is. A '50% off, plus 20% off, plus $10 off' headline sounds like 70%+ savings but typically delivers 60-65%. This tool applies discounts in the correct order, shows the actual final price, and surfaces the effective percentage so you know whether the deal is worth taking.
Sequential discounts applied in the right order
Percentage discounts multiply, not add. The calculator applies them sequentially and reports the equivalent single discount percentage. You see the real number, not the marketing headline.
Percentage, fixed-dollar, BOGO, and combinations
Whether the deal is 30% off, $20 off, or buy-one-get-one-50%-off, the tool models each structure and any combination.
Effective discount shown alongside dollar savings
A 50% discount that saves $5 on a $10 item is a real 50%, but only $5 in your pocket. The calculator shows both — useful when comparing small-percentage discounts on expensive items versus large-percentage discounts on cheap ones.
No signup, no tracking
The calculator runs entirely in your browser. There is no account to create and no purchase history to track.
What you only get here: a discount calculator that applies sequential discounts in the correct order and surfaces the true effective savings — without an account or a price-tracking browser extension.