Discount Calculator
Calculate sale price, discount amount, and savings for any percent off deal. Includes reverse calculator to find original price. Free.
Original Price & Discount Percentage
Enter discount percentage (0-100%)
Discount Calculation:
Final Price = Original Price - Discount Amount
Where: Discount Amount = Original Price × (Discount % / 100)
Example:
- Original Price: $100
- Discount: 20%
- Discount Amount: $100 × 20% = $20
- Final Price: $100 - $20 = $80
- You Save: $20
Common Discount Percentages:
- 10% off: Small discount on most items
- 20% off: Seasonal sales and promotions
- 30% off: Clearance sales and special events
- 50% off: Major sales (Black Friday, end of season)
- 70% off: Deep clearance and liquidation sales
Tips for Shopping:
- Compare prices before applying discounts
- Check if the original price was inflated before discount
- Calculate the actual savings in your currency
- Consider additional costs like shipping and taxes
Discount Calculator
A discount calculator finds the final sale price, discount amount, and total savings when a percentage or fixed amount is deducted from the original price. Enter the original price and discount percentage to see exactly how much you pay and how much you save. This tool works for retail shopping, seasonal sales, coupon deals, bulk pricing, and any situation where you need a quick percent off calculation.
Discount Formula
Two formulas cover all standard discount calculations:
Discount Amount = Original Price x (Discount % / 100)
Sale Price = Original Price - Discount Amount
Example: A jacket originally priced at $120 is 25% off. Discount amount = $120 x 0.25 = $30. Sale price = $120 - $30 = $90. You save $30.
Combined into one step: Sale Price = Original Price x (1 - Discount% / 100) = $120 x 0.75 = $90.
How to Use This Discount Calculator
- Enter the original price of the item before the discount.
- Enter the discount percentage (e.g., 20 for 20% off).
- The calculator instantly shows the discount amount, sale price, and total savings.
- Optional: enter a tax rate to see the final price after tax is applied to the discounted price.
Percent Off Examples Table
Quick reference for common discount percentages on popular price points:
| Original Price | 10% Off | 20% Off | 25% Off | 30% Off | 50% Off |
|---|---|---|---|---|---|
| $10 | $9.00 | $8.00 | $7.50 | $7.00 | $5.00 |
| $20 | $18.00 | $16.00 | $15.00 | $14.00 | $10.00 |
| $25 | $22.50 | $20.00 | $18.75 | $17.50 | $12.50 |
| $30 | $27.00 | $24.00 | $22.50 | $21.00 | $15.00 |
| $40 | $36.00 | $32.00 | $30.00 | $28.00 | $20.00 |
| $50 | $45.00 | $40.00 | $37.50 | $35.00 | $25.00 |
| $75 | $67.50 | $60.00 | $56.25 | $52.50 | $37.50 |
| $100 | $90.00 | $80.00 | $75.00 | $70.00 | $50.00 |
| $120 | $108.00 | $96.00 | $90.00 | $84.00 | $60.00 |
| $150 | $135.00 | $120.00 | $112.50 | $105.00 | $75.00 |
| $200 | $180.00 | $160.00 | $150.00 | $140.00 | $100.00 |
| $250 | $225.00 | $200.00 | $187.50 | $175.00 | $125.00 |
| $300 | $270.00 | $240.00 | $225.00 | $210.00 | $150.00 |
| $500 | $450.00 | $400.00 | $375.00 | $350.00 | $250.00 |
| $1,000 | $900.00 | $800.00 | $750.00 | $700.00 | $500.00 |
How to Calculate Discount Percentage
If you know the original price and the sale price but need to find the discount percentage, use this formula:
Discount % = ((Original Price - Sale Price) / Original Price) x 100
Example: A pair of shoes was $80, now on sale for $60. Discount % = (($80 - $60) / $80) x 100 = ($20 / $80) x 100 = 25%. The discount is 25% off.
This formula is useful when comparing deals across stores where some show the discount percentage and others only show the sale price.
How to Find the Original Price
If you know the sale price and the discount percentage but need to work backward to find the original price:
Original Price = Sale Price / (1 - Discount% / 100)
Example: You paid $68 for a shirt after a 15% discount. Original price = $68 / (1 - 0.15) = $68 / 0.85 = $80. The shirt was originally $80.
This reverse calculation is useful when a price tag shows only the discounted price and you want to verify the original retail value.
How to Calculate Stacked Discounts
When two discounts apply to the same item, they do not simply add up. For example, a 20% store sale plus a 10% coupon does not equal 30% off. Each discount applies to the already-reduced price.
Formula: Final Price = Original Price x (1 - Discount 1%) x (1 - Discount 2%)
Example: A $200 item has a 20% store discount and a 10% coupon applied after.
- After 20% off: $200 x 0.80 = $160
- After 10% off the reduced price: $160 x 0.90 = $144
- Final price: $144 (a combined saving of $56, or 28% — not 30%)
The effective combined discount is always less than the sum of the two percentages when applied sequentially.
Discount Calculator with Tax
In most countries, sales tax applies to the final discounted price, not the original price. This means applying a discount before tax gives a lower tax bill than receiving a tax rebate on the full price.
Formula: Final Price with Tax = Sale Price x (1 + Tax Rate%)
Example: A $100 item is 20% off. Sale price = $80. With 8% sales tax: $80 x 1.08 = $86.40 total.
| Original Price | Discount | Sale Price | + 8% Tax | + 10% Tax | + 15% Tax |
|---|---|---|---|---|---|
| $50 | 20% | $40.00 | $43.20 | $44.00 | $46.00 |
| $100 | 25% | $75.00 | $81.00 | $82.50 | $86.25 |
| $200 | 30% | $140.00 | $151.20 | $154.00 | $161.00 |
| $500 | 50% | $250.00 | $270.00 | $275.00 | $287.50 |
Common Percent Off Calculations
These are the most searched discount calculations. Use the shortcuts below for quick mental math:
- 10% off: Move the decimal one place to the left. 10% of $85 = $8.50. Sale price = $76.50.
- 20% off: Calculate 10% then double it. 20% of $60 = $12. Sale price = $48.
- 25% off: Divide by 4. 25% of $120 = $30. Sale price = $90.
- 30% off: Calculate 10% then triple it. 30% of $50 = $15. Sale price = $35.
- 50% off: Divide by 2. 50% of $200 = $100. Sale price = $100.
- 75% off: Divide by 4 to get 25%, which is what you pay. 75% off $80 = pay $20.
How to Spot Fake Discounts
Not every discount is genuine. Retailers sometimes inflate the "original price" before advertising a sale to make the discount appear larger. According to the U.S. Federal Trade Commission (FTC), a reference price must be a price at which the item was genuinely offered for sale for a reasonable period.
Watch for these patterns:
- Inflated original price: A product listed at "Was $200, Now $120" may never have actually sold at $200. The real discount is smaller than advertised.
- Anchor pricing: Retailers place an expensive item next to a mid-priced one to make the mid-priced item seem like a bargain by comparison.
- Perpetual sales: Items that are "always on sale" — the sale price is effectively the regular price. The FTC requires that sale prices be genuinely temporary.
- Free gift trap: "Buy one, get one 50% off" on items you would not normally purchase both of. Calculate the per-unit price before deciding if it is a real deal.
To verify a deal, check the item's price history on price-tracking sites or compare across multiple retailers before purchasing.
Limitations of This Calculator
This discount calculator handles single percentage discounts and fixed-amount discounts applied to a base price. It does not account for:
- Loyalty program tiers: Some retailers apply different discount rates based on membership level or purchase history. This calculator uses a single flat rate.
- Volume discounts: Bulk pricing often uses a tiered structure where the per-unit discount increases with quantity. Enter the effective per-unit price for accurate results.
- Currency-specific rounding: Some currencies round to the nearest 0.05 or whole unit. This calculator uses standard two-decimal rounding.
- Discount on tax: In rare cases, a coupon may apply to the pre-tax or post-tax total differently. This calculator applies the discount first, then tax.
Related Financial Calculators
For more financial calculations on DigiCalc, try these related tools:
- The Commission Calculator helps sales professionals calculate earnings from discounted deal pricing.
- Use the Savings Calculator to project how much you can save over time when you redirect money saved from discounts.