How to use this calculator
- Enter original price, first discount (%), second discount (%).
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
The second reduction applies to the already discounted price. No tax, shipping, coupons with fixed values or retailer eligibility conditions are assumed.
Worked example
A price of 100 discounted by 20%, then 10%, becomes 72: the combined discount is 28%, not 30%.
What the result means
Use a zero second discount for a single reduction. At an original price of zero, monetary saving is zero and the modeled percentage factors still apply.
Common questions
Can I add the two discounts?
No. Sequential discounts multiply the remaining price factors.
Does this include shipping or tax?
No. Add those separately according to the transaction rules.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.