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Discount calculator

To take a discount off a price, multiply the price by the percentage and subtract it: 25% off 80 is 80 − 20 = 60. In one step, multiply by 1 minus the discount: 80 × 0.75 = 60. To find the discount between two prices, divide the difference by the original price.

Advanced adds the details: more fields, your own assumptions and a fuller breakdown.

Price after discount

$60.00

You save
$20.00
Price after discount
$60.00
Quote this price
The numbers stay in this browser.

How to calculate a discount

Discount amount = price × percentage ÷ 100. Price after discount = price − discount amount. A 15% discount on 240 is 36, so the price is 204.

How to find the discount percentage

Discount % = (original price − discounted price) ÷ original price × 100. From 120 down to 90 is 30 ÷ 120 = 25% off.

Two discounts are not added together

20% off and then another 10% off is not 30% off. The second discount applies to the already reduced price: 100 → 80 → 72, which is 28% in total.

Put the final price on a QuickBilling invoice or estimate and see when your client opens it. See open tracking.

Questions

How do I calculate 20% off?

Multiply the price by 0.8. 20% off 150 is 120; the saving is 30.

How do I work out the discount percentage?

Subtract the sale price from the original, divide by the original and multiply by 100. 50 down to 40 is 20% off.

Is 20% off then 10% off the same as 30% off?

No. The second discount applies to the reduced price, so the total is 28% off, not 30%.

Does the calculator save my numbers?

No. It runs in your browser and sends nothing to QuickBilling or anyone else.

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