Discount Calculator
Calculate sale price, amount saved, and original price from any discount.
How to Use
- Enter the original price and discount percentage.
- The sale price and amount saved update instantly.
- Use "Reverse" mode to find the original price from a discounted final price.
- Stack discounts by applying one result as the new original price.
When to Use This
- Comparing a sale sticker against a price you remember: reverse mode recovers the pre-discount price, so you can tell whether the tag's original is real.
- Budgeting before a purchase, where the amount-saved figure matters as much as the sale price when you are deciding between two competing offers.
- Stacking a coupon on top of a seasonal markdown by feeding the first sale price back in as the new original price.
- Checking a partial refund after a discount was applied, since the tool shows the saved amount separately from the final price.
Frequently Asked Questions
About This Calculator
A discount is a multiplier rather than a subtraction. Taking p percent off multiplies the price by (1 - p/100), and recovering the original price divides by that same factor. Treating it as subtraction is what makes stacked discounts confusing: 20 percent off followed by 10 percent off multiplies 0.8 by 0.9 to give 0.72, which is 28 percent off, not 30.
Forward mode takes an original price and a discount between 0 and 100, and returns the sale price alongside the amount saved. Reverse mode takes the price actually paid and the discount applied, divides to recover the original, and shows the implied saving. A reverse discount of 100 percent is refused, because no original price can be recovered from zero. Every figure is formatted to exactly two decimal places with locale grouping, and no currency is assumed.
Notes & Limits
- Reverse mode rejects a discount of 100 percent or more, since dividing by zero or a negative factor cannot recover a meaningful original price.
- Only one discount is applied per calculation. Two sequential discounts have to be entered as two steps, because the combined rate is not their sum.
- Results are rounded to two decimals for display, which can differ by a cent from a till that rounds at a different stage or applies tax first.
- Taxes, shipping, loyalty points and minimum-spend conditions sit outside the formula; the sale price here is the discounted item price alone.