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Stacked Discount Calculator (Two Discounts)

When two discounts are applied one after the other (for example 20% off, then an extra 10% at checkout), the overall discount is not simply 30%.

This calculator finds the final price after two sequential discounts and shows the effective total discount percentage.

Formula: Final = Price × (1 − D1/100) × (1 − D2/100).

Calculate

Results are estimates for informational purposes only and may be rounded.
Tip: Press Enter to calculate.

Worked examples

Example 1: 20% then 10%

Question: £100 with 20% off, then an extra 10% off.

  • After 20%: £100 × 0.8 = £80
  • After extra 10%: £80 × 0.9 = £72
  • Effective discount: (100 − 72) ÷ 100 × 100 = 28%

Example 2: 15% then 15%

Question: £200 with 15% off twice.

  • Final = 200 × 0.85 × 0.85 = £144.50
  • Effective discount ≈ 27.75%

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