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Simple Calculators

Discount Calculator

Calculate sale prices, find discount percentages, and determine original prices instantly

Enter original price and discount % to find the final price

$
% off
%

Sales tax is optional; add it to see the total you pay.

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Quick summary

A discount calculator helps you quickly find a sale price after applying a percentage discount, determine what percent off a deal represents, or reverse-calculate the original price from a sale price and discount rate.

Reviewed by Simple Calculators TeamLast reviewed

For planning only — not financial or tax advice. Results are estimates based on your inputs and the stated assumptions. Confirm important decisions with a qualified professional.

How to use this calculator

  1. Enter the inputs requested by the calculator.
  2. Choose the units or options that match your situation and review the assumptions.
  3. Run or update the calculation to see the result.
  4. Review the result, breakdown, and formulas shown on the page.
  5. Check the inputs, units, dates, and limitations before saving or sharing the result.

Discount Formulas & Examples

Sale Price After Discount

Sale Price=Original×(1−Discount%100)\text{Sale Price} = \text{Original} \times \left(1 - \frac{\text{Discount}\%}{100}\right)
Original
Original price before discount
Discount%
Discount percentage (e.g. 20)

Worked example

$80 item at 25% off

Given
Original = $80.00
Discount% = 25
Calculation
Sale Price=80×(1−0.25)\text{Sale Price} = 80 \times (1 - 0.25)
Result
Sale Price = $60.00

Discount Percentage

Discount%=Original−SaleOriginal×100\text{Discount}\% = \frac{\text{Original} - \text{Sale}}{\text{Original}} \times 100
Original
Original price
Sale
Sale price

Worked example

Item originally $80, on sale for $60

Given
Original = $80.00
Sale = $60.00
Calculation
Discount%=80−6080×100\text{Discount}\% = \frac{80 - 60}{80} \times 100
Result
Discount = 25%

Original Price from Sale Price

Original=Sale Price1−Discount%100\text{Original} = \frac{\text{Sale Price}}{1 - \frac{\text{Discount}\%}{100}}
Sale Price
Current sale price
Discount%
Known discount percentage

Worked example

Item on sale for $60 at 25% off

Given
Sale Price = $60.00
Discount% = 25
Calculation
Original=601−0.25\text{Original} = \frac{60}{1 - 0.25}
Result
Original = $80.00

Frequently asked questions

How do I calculate a percentage off?

Multiply the original price by the decimal equivalent of the discount. For example, 20% off $50 = $50 × 0.20 = $10 discount → $40 sale price. Or: $50 × (1 − 0.20) = $40.

How do I find the original price if I know the sale price and discount?

Divide the sale price by (1 − discount as decimal). For example, if an item is $60 after a 25% discount: $60 ÷ (1 − 0.25) = $60 ÷ 0.75 = $80 original price.

Does the discount apply before or after tax?

In the US, discounts and coupons are applied to the pre-tax price. Sales tax is then calculated on the discounted (lower) price. This calculator follows that standard.

What is the difference between discount and markdown?

A discount is a reduction applied for a specific reason (coupon, promotion, bulk order). A markdown is a permanent reduction in the listed retail price, typically used in retail inventory management. Both are calculated the same way.

Key terms

Discount
A reduction from the original or list price of a product or service.
Sale Price
The price after a discount has been applied.
Discount Rate
The percentage by which the original price is reduced.
Markdown
A permanent reduction in retail price, typically to clear inventory.

Methodology, sources & limitations

This page shows the formula, assumptions, and limitations used for this estimate. Rates, thresholds, and other time-sensitive inputs can change, so verify them against the relevant official source before relying on a result.

For our review approach and the primary sources we consult, see the methodology and source policy. If you spot an outdated figure or formula, please contact us with a correction.