Discount Calculator

A price of 200 with 20% off and a further 10% off ends at 144, saving 56 (28% effective).

How it works

• Applied the first discount to the original price.
• Applied the second discount to the already-discounted price (discounts compound, not add).
• Reported the total savings and the effective discount over the original price.

final = price × (1 − d1/100) × (1 − d2/100) = 200 × (1 − 20/100) × (1 − 10/100) = 144

• Successive discounts multiply, so 20% then 10% is 28% off, not 30%.
• This is an illustration for information only and is not financial advice.

Methodology

1. Reduce the price by the first percentage: price1 = price × (1 − d1 ÷ 100).
2. Reduce the result by the second percentage: final = price1 × (1 − d2 ÷ 100).
3. Total savings = price − final; effective discount = total savings ÷ price × 100.
4. Money is rounded half-up to two decimals; the effective rate to four.

Usage

1. Enter the original price.
2. Enter the first discount percentage.
3. Optionally enter a second discount applied on top, then read the savings and final price.

Examples

These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.

20% then a further 10%

{
  "originalPrice": 200,
  "discountPercent": 20,
  "additionalDiscountPercent": 10
}

Single 30% discount

{
  "originalPrice": 150,
  "discountPercent": 30
}

Full clearance

{
  "originalPrice": 80,
  "discountPercent": 100
}

Limitations

Disclaimer

This calculator is an illustration for information only and is not financial advice. It does not know a retailer's pricing, coupon or tax rules; the final price at the point of sale is the authoritative one.