Discount Chain Calculator

Because each discount applies to the price left after the one before it, not to the original. 20% off 100 leaves 80, then 10% off 80 removes only 8, landing at 72. That is an effective 28% off, two points shy of the 30% the two numbers seem to promise.

No. Multiplying the percentages together is commutative, so a 20% then 10% chain and a 10% then 20% chain both end at 72 on a 100 price. Only the intermediate step prices differ, which is why the per-step table can look different even when the final price is identical.

It is the total savings divided by the original price, expressed as a percentage. It is always smaller than the sum of the individual discounts, and it is the honest single figure to compare against a competitor's flat one-off offer.

As many as you like. Press '+ Add discount' to append another step and the calculator recomputes the whole chain instantly, showing the price after each cut in the step table. Remove any row to shorten the chain.

Yes. The price after each step, the final price and the total savings are all rounded to the nearest cent, and the effective discount is rounded to two decimal places. That matches how a register would present the numbers.

Each discount must be between 0 and 100 percent, and the starting price must be zero or more. A negative price or a discount outside that band is rejected, so you cannot accidentally model an impossible markup here.

If each acts as a straight percentage off the current price, yes, just list them in the order they apply. Fixed-dollar coupons, spend thresholds and cashback that pays back later are not percentage cuts, so those need a different calculation than this tool provides.

No. It works purely on the pre-tax price and the percentage discounts you enter. Tax is applied to the final discounted price at checkout, so add it separately with a sales tax calculator if you need the out-the-door figure.

Yes. Every calculation runs in your browser and nothing about your price or discounts is uploaded to a server.