Discount Calculator
Includes stacked-discount mode (20% off, then 10% off ≠ 30% off).
Pay 36 · Save 9 (20% effective)
FAQ
How do I calculate 20% off?
Multiply the price by 0.80. A $45 item at 20% off is $36.
Do stacked discounts add up?
No — 20% then 10% off is 28% total, not 30%, because the second discount applies to the already-reduced price.
Is tax applied before or after a discount?
Retailers apply tax to the discounted price in nearly all jurisdictions.