The discount calculator finds the amount saved and final price after a percentage reduction. It also supports a second successive discount, which is useful for sale prices combined with a promotional code.
How to use this calculator
Enter the original price and first discount. If another discount applies to the already reduced price, enter it as the second discount. Set it to zero when only one reduction applies.
Formula & calculation method
Final price = original price × (1 − d1/100) × (1 − d2/100)Successive discounts multiply rather than add. The total saving is original price minus final price. This means a 20% discount followed by 10% is not equivalent to a single 30% discount.
Worked example
A 200 item with 20% off first falls to 160. A further 10% reduction removes 16, producing a final price of 144 and total savings of 56, equivalent to 28% rather than 30%.
Why this is useful
The calculator clarifies the real checkout price and prevents a common percentage mistake. It can compare promotional combinations while displaying both the amount saved and the amount payable.
Limitations to keep in mind
The model assumes both discounts apply to the entire price and in the entered order. Store exclusions, fixed-value coupons, taxes, shipping, and rounding rules may change the actual checkout total.
Frequently asked questions
Why are two discounts not added together?
The second percentage applies to the reduced price, not the original price, so its currency value is smaller than the same percentage off the original.
Does discount order matter?
For two percentage-only discounts, multiplication makes the final price the same either way. Fixed coupons or store rules can make order important.
Can I calculate a 100% discount?
Yes. A 100% first or second discount produces a final price of zero in this mathematical model.