Percent Off Calculator
Quickly compute item price reductions and money saved during store sales.
Sale Summary
Working backwards from the sale price
Percent off is the everyday form of a percentage decrease: subtract the discount from 100%, and multiply. 35% off means paying 65%, so $120 becomes $78. Doing it as a single multiplication rather than calculating the discount and subtracting is both faster and less error-prone in your head — 65% of $120 is the whole calculation.
The reverse direction is where mistakes creep in. If a jacket is $78 after 35% off, the original was $78 ÷ 0.65 = $120, not $78 × 1.35, which gives $105.30 and is wrong. Dividing by the remaining fraction is the correct move whenever you are recovering an original price from a discounted one, and the same logic applies to stripping tax out of a tax-inclusive total.
Two quick mental shortcuts. 10% is a decimal shift, so any multiple of 10% is fast: 30% of $45 is three lots of $4.50, or $13.50. And percentages commute — 8% of 50 equals 50% of 8, which is 4, and the second is trivially easier. Reversing an awkward percentage often turns it into one you can do instantly.
Frequently asked questions
How to calculate percent off?
Multiply original price by (100 - percent off) divided by 100.
How do I calculate a percent off?
Multiply the price by the percentage to get the saving, or multiply by (1 - percentage) to get the final price directly. 25% off $60 is a $15 saving and a $45 price. For quick mental maths, 10% is a decimal shift and other values build from there - 25% is a quarter, 15% is 10% plus half of it.
What is the difference between percent off and percentage points?
Percent off is multiplicative against a base. Percentage points are an absolute difference between two percentages - a rate rising from 4% to 6% has risen 2 percentage points but 50 percent. Conflating the two is a routine source of misleading claims.
Why does a 50% increase not cancel a 50% decrease?
Because each applies to a different base. $100 less 50% is $50; adding 50% of $50 returns $75, not $100. Reversing a 50% cut requires a 100% increase. The same asymmetry is why a portfolio down 50% needs to double to break even.