Discount Calculator
Calculate price after discount with optional tax. Support percentage or fixed discounts, stacked discounts, and reverse calculations.
Discount Calculator
Calculate discounts, tax, and final price
Final Price
$80.00
Breakdown
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Frequently Asked Questions
How do I calculate a percentage discount?
Multiply the original price by the discount percentage, then subtract from the original price. For example: $100 with 20% off = $100 - ($100 × 0.20) = $80.
How do stacked discounts work?
Stacked discounts are applied sequentially. For example, 20% off then 10% off means: first take 20% off the original, then take 10% off that result. This is NOT the same as 30% off.
Is tax calculated before or after discounts?
Sales tax is typically calculated on the discounted price, not the original price. This means you only pay tax on what you actually spend.
How do I find the original price from a sale price?
Divide the sale price by (1 - discount rate). For example: $80 after 20% off means original = $80 / (1 - 0.20) = $80 / 0.80 = $100.