Discount Calculator

Calculate sale prices, savings, and discount percentages. Figure out original prices, stacked discounts, and find the best deals.

Discount Results

Final Price

$75

You Save

$25

25.0% off

Original Price$100
Discount25.0%
Total Savings$25

What do you want to calculate?

Values

11,000
%
090

Price Breakdown

Quick Reference

DiscountYou PayYou Save
10% off$90$10
15% off$85$15
20% off$80$20
25% off$75$25
30% off$70$30
40% off$60$40
50% off$50$50
60% off$40$60
70% off$30$70

Discount Formulas

Calculate Sale Price:

Sale Price = Original × (1 - Discount%/100)

Calculate Discount %:

Discount% = (Original - Sale) / Original × 100

Calculate Original Price:

Original = Sale Price / (1 - Discount%/100)

Stacked Discounts:

Final = Original × (1 - D1%) × (1 - D2%)

Stacked Discount Equivalents

Two successive discounts equal these single discounts:

First+Second=Effective
10%+10%=19%
20%+10%=28%
20%+20%=36%
25%+15%=36.25%
30%+20%=44%
50%+50%=75%

Quick Answer

To calculate a discounted price: Sale Price = Original Price × (1 - Discount%). For a $100 item at 30% off: $100 × (1 - 0.30) = $100 × 0.70 = $70. Savings = $100 - $70 = $30. Calculate any discount at practicalwebtools.com.

Key Facts

  • Discount formula: Sale Price = Original × (1 - Discount%)
  • Savings formula: Savings = Original × Discount%
  • To find discount %: Discount = (Original - Sale) / Original × 100
  • Stacked discounts multiply: 20% then 10% = 28% total (not 30%)
  • "Up to X% off" often means best items have smaller discounts
  • Compare unit prices, not just discount percentages
  • Some "sales" inflate original prices before discounting

Frequently Asked Questions

To calculate a discount: Savings = Original Price × (Discount % / 100). Final Price = Original Price - Savings. For example, a 20% discount on $50: Savings = $50 × 0.20 = $10. Final price = $50 - $10 = $40.
Stacked discounts apply sequentially, not additively. A 20% + 10% discount is NOT 30% off. First apply 20% to get a new price, then apply 10% to that result. $100 with 20% then 10% off = $100 × 0.80 × 0.90 = $72 (28% effective discount).
Use this formula: Original Price = Sale Price / (1 - Discount%). If an item is $60 after 25% off: Original = $60 / (1 - 0.25) = $60 / 0.75 = $80. The original price was $80.
Discount % = ((Original - Sale) / Original) × 100. If original price is $80 and sale price is $60: Discount = (($80 - $60) / $80) × 100 = 25%. You're getting 25% off.
Not necessarily. Compare final prices, not percentages. 50% off $30 ($15) is worse than 30% off $50 ($35 → $35 vs $15). Also consider quality, need, and whether you'd buy at full price. The best discount is on something you actually need.