Money
How to calculate a discount
You have a list price and a percent off. You will read the sale price and the saving in this tab. 20% off 100 leaves 80.00. A 20% margin on a selling price of 100 is a different question: that one is about cost.
Open discount when you know the list price and the percent off. The page does not name a currency. Nothing is uploaded.
Open Discount calculatorContents
Separate a discount from a margin
20% off 100 means the buyer pays 80.00. A 20% margin on a selling price of 100 means the cost was 80 and the profit is 20. Same digits, different job.
20% off 100: sale 80.00, saving 20.00. Not a 20% margin. Open discount on cv.cm
The arithmetic stays in this tab.
Open Discount calculatorEnter the list price and the percent off
The price must be zero or more. 100 at 20% off is a sale price of 80.00 and a saving of 20.00. 80 at 25% off is 60.00 and 20.00.
Read sale price and saving
Both lines use two decimals. There is no currency. Copy both, then use the line the form named.
A percent over 100 can go below zero
120% off 100 is a sale price of -20.00 and a saving of 120.00. That is arithmetic. A shop tag that cannot go below zero needs a different rule.
120% off 100 is -20.00. Minus 10% raises the price to 110.00. A negative percent raises the price
Minus 10% on 100 is a sale price of 110.00. The saving line is -10.00. If the tag says 10% off, the percent is 10, not -10.
FAQ
Can I calculate a discount free online?
Yes. cv.cm shows the sale price and the saving in this tab. Nothing is uploaded.
What is 20% off 100?
Sale price 80.00, saving 20.00. That is not a 20% profit margin.
Can the percent be over 100?
Yes. 120% off 100 is a sale price of -20.00. That is arithmetic, not a shop rule.
What does a negative percent do?
It raises the price. Minus 10% on 100 is 110.00. A tag that says 10% off uses 10.
Is the price uploaded?
No. Closing the tab discards it. The numbers have no currency.