Cyber Monday Calculator

Calculate Your Cyber Monday Deals and Real Savings

Cyber Monday brings massive promotional discounts, coupon codes, and bundle offers across online retailers. However, understanding how stacked discounts, sales taxes, and shipping fees impact your final cost can be tricky. Our Cyber Monday Calculator calculates the exact price you pay out-of-pocket and your total percentage saved.

How Stacked Discounts Work

Most online stores apply discounts sequentially rather than additively. For example, if an item is listed at 25% off during Cyber Monday and you apply an extra 10% coupon code:

• The primary sale discount reduces the original price first.
• The coupon discount applies to the newly reduced subtotal, not the original price.
• Applicable sales tax is added to the net subtotal.
• Shipping fees are added to determine your final bill.

Formula for Cyber Monday Savings

The step-by-step mathematical model for stacked discounts is as follows:

$$P_{\text{primary}} = P_{\text{original}} \times \left(1 - \frac{D_1}{100}\right)$$

$$P_{\text{subtotal}} = P_{\text{primary}} \times \left(1 - \frac{D_2}{100}\right)$$

$$\text{Total Cost} = \left(P_{\text{subtotal}} \times \left(1 + \frac{T}{100}\right)\right) + S$$

Where $P_{\text{original}}$ is the original total, $D_1$ is the primary sale discount percentage, $D_2$ is the promo coupon discount percentage, $T$ is the sales tax percentage, and $S$ is the shipping fee.

Related Shopping Tools

If you are planning your holiday shopping budget, check out our Black Friday Calculator, or calculate business campaign metrics with our CPA Calculator.