METHOD
Formula and method
Price × (1−discount1/100) × (1−discount2/100). Discounts are not added together.
Discount calculator for two sequential discounts and tax
Apply two sequential discounts and optional tax.
01
Your inputs
Starting values are an example. Replace them with your own.
Your inputs stay in your browser.
02
Your result
Enter your details and run the calculation.
About this result
Informational calculations. Check assumptions, dates and jurisdiction before making a decision.
Full disclaimerHow do you work out a discount on a sale price?
The discount calculator multiplies the original price by (1 minus the first discount) and then by (1 minus the extra discount), because the second discount applies to the already reduced price. So 20% and then 10% off 100 KM gives 72 KM, an effective discount of 28%, not 30%. If tax is not included in the price, enter the rate, for example 17% VAT, and it is added to the discounted price.
TRACEABLE
Sources and validity
Basic arithmetic or geometry using the formula shown. Uses only your inputs.
How we maintain data