Free Discount Calculator — Find Sale Price, Savings & Percent Off Instantly

Enter the original price and discount percentage to instantly see the sale price, how much you save, and the final cost. Or enter the original and sale prices to find the discount percentage. Free, no signup, works on any device.

Whether you are shopping a sale, pricing products for your business, or calculating bulk purchase discounts, getting the math right matters. Here is every discount scenario with the formula and a quick reference table.

Quick Discount Reference Table

Original Price	10% Off	20% Off	25% Off	30% Off	40% Off	50% Off
$25	$22.50	$20.00	$18.75	$17.50	$15.00	$12.50
$50	$45.00	$40.00	$37.50	$35.00	$30.00	$25.00
$75	$67.50	$60.00	$56.25	$52.50	$45.00	$37.50
$100	$90.00	$80.00	$75.00	$70.00	$60.00	$50.00
$150	$135.00	$120.00	$112.50	$105.00	$90.00	$75.00
$200	$180.00	$160.00	$150.00	$140.00	$120.00	$100.00
$500	$450.00	$400.00	$375.00	$350.00	$300.00	$250.00

The Three Discount Formulas You Need

1. Find the sale price: Sale Price = Original Price × (1 - Discount%/100). Example: 35% off $80 → $80 × 0.65 = $52
2. Find how much you save: Savings = Original Price × (Discount%/100). Example: 35% off $80 → $80 × 0.35 = $28 saved
3. Find the discount percentage: Discount% = ((Original - Sale) / Original) × 100. Example: Was $80, now $52 → (28/80) × 100 = 35% off

Stacked Discounts — Why 20% + 10% Is Not 30%

Retailers often stack discounts: "Take an extra 10% off already reduced items." This is not the same as the combined percentage:

Scenario	Calculation	Final Price	Effective Discount
30% off $100 (single discount)	$100 × 0.70	$70.00	30.0%
20% off then 10% off $100	$100 × 0.80 × 0.90	$72.00	28.0%
10% off then 20% off $100	$100 × 0.90 × 0.80	$72.00	28.0%
15% off then 15% off $100	$100 × 0.85 × 0.85	$72.25	27.75%
25% off then 25% off $100	$100 × 0.75 × 0.75	$56.25	43.75%

The order of stacked discounts does not matter mathematically (multiplication is commutative). But the combined discount is always less than the sum of individual percentages.

Real-World Discount Scenarios

• Coupon codes: Enter the original price and the coupon percentage to see your final cost before adding the item to your cart.
• Retail pricing: If you are setting a sale price and want a specific margin, work backwards from the target sale price to the required discount percentage.
• Bulk discounts: "Buy 5+ units, get 15% off." Calculate the break-even point: is it worth buying 5 at the discount vs. 3 at full price?
• Comparing sales: Store A offers 25% off $120. Store B offers the same item at $85 (no discount). Store A: $120 × 0.75 = $90. Store B wins at $85.

Pair These Tools Together

• Discount Calculator — calculate any discount instantly
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• Loan Calculator — calculate monthly loan payments
• BMI Calculator — calculate body mass index

Honest Limitations

This calculator computes pre-tax discounts. Sales tax varies by state and municipality, so the final checkout price will be higher. The calculator also does not handle complex pricing schemes like tiered pricing, subscription discounts, or loyalty point conversions. For those, you need the specific retailer pricing structure.