Percentage Increase Calculator
Calculate percentage increase, decrease, and absolute change between two values, or find a new value from a percentage.
Comparing two numbers to see how much something grew or shrank is one of the most common calculations in business, school, and everyday budgeting. This percentage increase calculator takes an original value and a new value and instantly returns the percent change, the absolute change, and whether it is an increase or a decrease. It is built for students checking homework, analysts comparing sales figures, shoppers comparing prices, and anyone who needs a quick, accurate answer without doing the math by hand. A second mode flips the calculation around: enter an original value and a percentage, and the tool tells you the resulting new value, useful for applying a raise, a discount, or a markup. This kind of comparison also comes up frequently in finance, retail pricing, and performance reviews, wherever two numbers need to be compared over time. Every result shows the formula with your actual numbers substituted in, so you can see exactly how the answer was reached, and you can copy the final figure with one click.
Original and New Value
+25.00%
Absolute Change
+30
Formula With Your Numbers
((150 − 120) ÷ 120) × 100 = 25.00%How to Use This Calculator
1. Choose a calculation mode
Use Find % Change to compare two known values, or Find New Value to apply a percentage to a starting value.
2. Enter your values
Type the original value and either the new value or the percentage change.
3. Read the result
The calculator shows the percentage, the absolute change, and the direction (increase or decrease).
4. Copy the formula or result
Use the copy button to grab the final number for a report, spreadsheet, or assignment.
How It Works
Percentage Change = ((New Value − Original Value) ÷ Original Value) × 100Example: if a product price moves from $120 to $150, the change is ((150 − 120) ÷ 120) × 100 = 25%. Since the result is positive, this is a 25% increase, with an absolute change of $30.
Frequently Asked Questions
How do you calculate percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. For example, going from 120 to 150 is ((150 − 120) ÷ 120) × 100 = 25% increase.
What is the difference between percentage increase and percentage change?
Percentage change is the general term covering both increases and decreases. Percentage increase specifically describes a positive change, while percentage decrease describes a negative one. This calculator reports the direction automatically.
How do I find the new value after a percentage increase?
Multiply the original value by the percentage as a decimal, then add that to the original value. For example, a 25% increase on 120 is 120 + (120 × 0.25) = 150.
Can this calculator handle a percentage decrease?
Yes. Enter a negative percentage in the Find New Value mode, or enter a new value smaller than the original in the Find % Change mode, and the calculator labels the result as a decrease.
Why can't the original value be zero?
Percentage change is calculated by dividing by the original value. Dividing by zero is mathematically undefined, so the calculator shows an error if the original value is zero.