Discount Calculator
Work out the sale price and the money saved from any percentage discount.
Formula and sources updated · Data sources · 2View algorithm, constants and default inputs (JSON)
Breakdown
About this calculator
Enter the original price and discount percentage to calculate the reduced price and savings. Amounts are in US dollars; results exclude tax and shipping.
Worked example
calculated with the default values below
Original price 100 $ · Discount 25 % Final price 75.00 $ · You save 25.00 $
Method and assumptions
F = P × (1 − d ÷ 100); S = P × d ÷ 100 d is a percent; F and S always add up to P. Enter the original price and discount percentage to calculate the reduced price and savings. Amounts are in US dollars; results exclude tax and shipping. The references explain definitions and methods; any extra preset must be checked against the assumptions on this page.
Data sources
The references explain definitions and methods; any extra preset must be checked against the assumptions on this page.
Disclaimer
These calculators give estimates for general information only. They are not financial, tax or investment advice and do not take your personal circumstances into account. Before borrowing, investing or filing, confirm the numbers with a qualified adviser in your jurisdiction.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Frequently asked questions
How is the displayed discount calculated?
The tool applies one percentage to the entered price: a $100 price with 25% discount returns $75 final price and $25 savings. It does not calculate tax, shipping or stacked discounts.
How can I compare a fixed amount off with this percentage tool?
Convert the fixed amount to a percentage of the original price yourself, then enter that percentage. For example, $10 off a $40 item is 25%, while $10 off $200 is 5%. This calculator only accepts a percentage, so it does not apply a fixed-amount coupon directly.
Which inputs and limits apply to Discount Calculator?
Use the units shown beside each field. These are form limits, not recommended settings. Original price: 0–100,000,000 $; Discount: 0–100 % F = P × (1 − d ÷ 100); S = P × d ÷ 100 d is a percent; F and S always add up to P. Enter the original price and discount percentage to calculate the reduced price and savings. Amounts are in US dollars; results exclude tax and shipping. The references explain definitions and methods; any extra preset must be checked against the assumptions on this page.
What is a complete worked example for Original price = 100 $; Discount = 25 %?
Inputs: Original price = 100 $; Discount = 25 %. Calculation: F = P × (1 − d ÷ 100); S = P × d ÷ 100. Results: Final price = 75.00 $; You save = 25.00 $.