Discount / Percent-Off Calculator
Compute the sale price, savings, and optional tax-inclusive total from an original price and a percent discount.
Limitations: Assumes tax is computed on the sale price (the common US retail rule). A few jurisdictions tax the pre-discount price when the discount is a manufacturer coupon — check your receipt. Does NOT handle stacked or percent-on-percent coupons.
What to do next: For bracket comparisons ("is 30% off cheaper than $10 off?"), run both and compare sale price directly.