Percentage Calculators
Fast calculators for common percentage problems, from percent of a number to discounts, increases, decreases, and percent change.
Use these tools when you need to turn a percentage into a number, compare an old value with a new value, find a sale price, or compare two values without treating either one as the starting point.
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Percent of a number
Percentage Calculator: Use this for questions like 20% of 150 or what percent one number is of another.
Percent of percent
Percent of Percent Calculator: Use this for questions like 20% of 50%, or how to find a percentage of a percentage.
Sale price
Discount Calculator: Use this to calculate a discount, final price, and savings amount.
Increase only
Percentage Increase Calculator: Use this when the new value is higher and you want the percent growth.
Decrease only
Percentage Decrease Calculator: Use this when the new value is lower and you want the percent drop.
Old value to new value
Percentage Change Calculator: Use this when one number is the starting value and another number is the result.
Compare two values
Percentage Difference Calculator: Use this when neither value is the original value and you need a neutral comparison.
FAQ
Use the percentage calculator for percent of a number, percentage change for old-to-new comparisons, percentage increase or decrease for one-way changes, percentage difference for neutral comparisons, and the discount calculator for sale prices.
Divide the percent by 100, then multiply by the number. For example, 20% of 150 is 0.20 x 150 = 30.
Divide the first percentage by 100, then multiply by the second percentage. For example, 20% of 50% is 10%.
Percentage change measures how much a value moved from an old value to a new value, using the old value as the reference.
No. Percentage change uses the old value as the reference. Percentage difference uses the average of both values, so neither value is treated as the starting point.
Multiply the original price by the discount percent divided by 100 to find the savings, then subtract the savings from the original price.
Yes. A negative percentage change means the new value is lower than the old value.