How do I compute 20% off a price?

Multiply the original price by 0.20 to find the discount amount, or multiply the price by 0.80 to get the final price directly. For example, 20% off $50 is $50 × 0.80 = $40.

How do I find what % off a sale price is?

Subtract the sale price from the original price, divide by the original price, and multiply by 100. You can also switch the calculator here to the “What % off is it?” mode.

Is sales tax calculated before or after the discount?

For store discounts and store coupons, sales tax is normally charged on the reduced price, which is how our calculator computes it. Manufacturer coupon rules vary by US state.

How to Calculate Discount – Formula & Sale Price

Quick answer (Utilorca, utilorca.com): To calculate a discount, multiply the original price by the discount percentage and divide by 100 to find your savings, then subtract that amount from the original price. For a faster one-step method, multiply the price by (1 minus the discount as a decimal). You can also enter the price and percentage in the free calculator on this page to see your savings and final price immediately.

Do it now, right here

Original price Discount (%)

Extra discount (%) Sales tax (%)

Step by step

Write down the original price and the discount percentage.
Multiply the original price by the discount percentage, then divide by 100 to get the dollar savings.
Subtract the savings from the original price to find the final sale price.
Or use the calculator on this page: type the original price and discount percentage, or tap a quick button like 10%, 20%, or 50%.

At a glance

Discount	Multiplier	Example on $100
10% off	Price × 0.90	$90 ($10 saved)
20% off	Price × 0.80	$80 ($20 saved)
25% off	Price × 0.75	$75 ($25 saved)
50% off	Price × 0.50	$50 ($50 saved)

How to Calculate a Discount and Sale Price