About this tool
Type a price and a percent off and the sale price and savings appear as you type, with a table of every common discount on that price underneath so you can compare the 30% rack with the 40% one. A second field stacks an extra coupon the way stores apply them, on the already reduced price, and a sales tax field turns the shelf price into what the register will ask for.
The other two modes work backwards. Enter an original and a sale price to learn what percent off that really is (handy when a tag says "was $80, now $60" and you want to know if it beats the 30% code you have). Or enter a sale price and the discount to recover the original, which is the division people get wrong: 25% off means dividing by 0.75, not adding 25% back.
How to use it
- Pick what you know: the price and the discount, the original and sale prices, or the sale price and the discount.
- Type the numbers; add a second coupon or your sales tax if you want the register total.
- Read the sale price, the amount saved, and the table of other discounts on the same price.
Questions
How do I work out 20% off in my head?
Take 10% by moving the decimal point one place left, then double it. For 25% off, take a quarter away; for 15%, take 10% plus half of that again.
Is 25% off plus an extra 10% off the same as 35% off?
No. The second discount comes off the already reduced price, so it is 32.5% off in total. Stacked percentages multiply; the calculator shows the combined figure when you enter an extra discount.
Do I pay sales tax on the sale price or the original?
On the sale price in every US state; tax is charged on what you actually pay. Enter your local rate to see the total.
How do I find the original price from a sale price?
Divide the sale price by (1 minus the discount). A $60 item at 25% off was $60 / 0.75 = $80. Switch the first field to the third option and the calculator does it.
Is anything I type sent anywhere?
No. The calculator runs entirely in your browser; nothing is stored or transmitted. Refresh the page and it starts clean.
Is it free, are files uploaded, which browsers work: the general questions are answered once for the whole site.