Double Discount Calculator

Q: What is the double discount formula?

The double discount formula reads: new price = initial price × (1 - r) × (1 - q) , where: r is the first discount; and q is the second discount.

Q: What is the total discount after two 10% discounts?

The total discount is 19% . To arrive at this result, observe that (1- 0.1) × (1 - 0.1) = 0.9 × 0.9 = 0.81 . That is, the new price is 81% of the initial price. Hence, the total discount is 100% - 81% = 19% .

Q: What is the price after two 10% discounts if the price was $100?

The new price is $81 . Indeed, the price after the first discount equals $100 - 0.1 × 100 = $100 - $10 = $90 . And after the second discount, we obtain $90 - 0.1 × 90 = $90 - $9 = $81 , as claimed.

Creators

Mateusz Mucha

Mateusz is a professional problem-solver with a lifelong passion for software development and numbers. In 2014, he launched Omni Calculator, a groundbreaking tool that allows him to accomplish his life mission: helping people make better decisions whenever calculations are needed. Today, Mateusz serves as the CEO of Omni Calculator, which attracts over 18 million visitors monthly. When he is not busy growing the business, he enjoys sports, with cycling being his favorite. See full profile

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and Wei Bin Loo

Wei Bin Loo

Wei Bin is a Product Manager based in London, leading a technology company's Product and Data functions. With a keen focus on delivering top-notch technology solutions, Wei Bin empowers businesses to unlock their full potential through innovative products, data-driven insights, and an unwavering commitment to customer value. His passion lies in guiding companies toward growth and success, leveraging the power of technology, data, and customer-centric product solutions. At Omni, Wei Bin leverages his financial expertise as a Strategy Consultant and CFA Level 2 holder to create various financial tools aimed at helping people improve their financial literacy. Outside of his professional pursuits, Wei Bin is an avid wine enthusiast with extensive knowledge and certification in the field. He also enjoys the strategic challenges of chess and poker, as well as swimming in his leisure time. See full profile

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Reviewers

Jack Bowater

New

The double discount calculator helps you in a scenario where two levels of discounts are applied to the price of a product or service. Please keep in mind that the second discount is applied to the price AFTER the first discount has been applied. For example, if the original price was $50 and we have two discounts: 20% and 10%, then we're doing something like this: $50 - 20% × $50 = $50 - $10 = $40. Then $40 - 10% × $40 = $40 - $4 = $36. Also, you may want to check out the regular discount calculator and the triple discount calculator for those super happy occasions ;-).

No matter how enticing a discount offer is, please keep in mind that you must set aside some portion of your income as savings before expenses. Set a long term goal for your savings with our savings goal calculator and see how much you need to set aside each month.

What is the double discount formula?

The double discount formula reads:

new price = initial price × (1 - r) × (1 - q),

where:

r is the first discount; and
q is the second discount.

How do I calculate the double discount?

To quickly determine the price when two discounts were applied, one on the other, you need to:

Convert both discounts from percentages to decimals. For example, 10% = 0.1.
Compute the difference between 1 and the first discount.
Compute the difference between 1 and the second discount.
Multiply together the numbers from steps 2 and 3.
Multiply the initial price by the number from Step 4.
The value you've obtained is the new price.
In case of problems, use an online double discount calculator.

FAQs

What is the total discount after two 10% discounts?

The total discount is 19%. To arrive at this result, observe that (1- 0.1) × (1 - 0.1) = 0.9 × 0.9 = 0.81. That is, the new price is 81% of the initial price. Hence, the total discount is 100% - 81% = 19%.

What is the price after two 10% discounts if the price was $100?

The new price is $81. Indeed, the price after the first discount equals $100 - 0.1 × 100 = $100 - $10 = $90. And after the second discount, we obtain $90 - 0.1 × 90 = $90 - $9 = $81, as claimed.