Free

Sequential Discount Calculator

Enter discounts applied in sequence to calculate the final unit price and equivalent single discount. I apply each discount to the amount left after the previous one. If you enter unit cost, you can also see the extra sales needed to preserve total profit. A zero or negative margin produces a warning.

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How to use it

  1. 1Enter the original unit price.
  2. 2Add discounts in sequence.
  3. 3Enter unit cost to compare required extra sales.
  4. 4Review final price, equivalent discount and margin warnings.

Example

Discounting 100 by 20% and then 10% gives 72, equivalent to 28% off. At a cost of 44, preserving total profit requires 100% more sales.

Formula and limitations

  • Final price = original price × ∏(1 − discount / 100). Equivalent discount = (1 − final / original) × 100.
  • Extra sales (%) = ((original price − cost) / (final price − cost) − 1) × 100.
  • Unit cost and other costs are assumed constant. Discounts are not added; intermediate amounts are not rounded.

Frequently asked questions

Are discounts added?

No, each discount applies to the remaining price.

Is cost required?

Only for the extra-sales calculation.

What if the margin is zero?

The extra-sales result is omitted and a warning is shown.

What does extra sales preserve?

It preserves the original total contribution, assuming constant costs.

Is tax calculated?

No; compare price and cost on the same tax basis.

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