Choose Calculation Type
Switch between basic percentage, percentage change, and percentage difference.
%
This is the base number the percentage is taken from. Example: 20% of 500 uses 500 as this value.
Percentage Calculator
Calculate percentages, percentage change, and increase/decrease
Common Percentages
How It Works
This calculator handles the most common percentage calculations used in daily math, finance, and analysis.
- Use Basic to find what portion of a total a percentage represents.
- Use Change to measure increase or decrease from an original baseline.
- Use Difference to compare two values against their shared average.
Example Calculations
Sales discount
25% of $80
$20 off
Tax calculation
8% of $150
$12 tax
Price increase
From $50 to $65
30% increase
Tip amount
18% of $75
$13.50 tip
Frequently Asked Questions
What's the difference between percentage change and percentage difference?
Percentage change uses an original value as the base. Percentage difference compares two values against their average.
How do I calculate a percentage increase?
Use Percentage Change with original and new values. Positive values indicate increase, negative values indicate decrease.
Can percentages be greater than 100%?
Yes. Values over 100% indicate a result larger than the whole or baseline.
How do I reverse a percentage calculation?
Divide the known result by the percentage in decimal form to recover the original value.