Finance & Math
Percentage Calculator.
Calculate percentages easily with 4 common percentage formulas. Great for discounts, tips, growth rates, and math tasks.
Calculate Part (X% of Y)
%
RESULT30
Calculate Percentage (X is what % of Y)
RESULT12.5%
Calculate Rate Change (X to Y)
RESULT+25% (Increase)
Add / Subtract % (Y ± X%)
%
RESULT230
How to use the Percentage Calculator
- Select the tab matching your query (e.g. Find X% of Y, or Percent Increase/Decrease).
- Type your values into the text inputs.
- The calculator computes and shows results in real-time as you type.
Frequently Asked Questions
To calculate percentage change: subtract the old value from the new value, divide by the absolute old value, and multiply by 100.
Multiply the number by the percentage rate, then divide by 100 (e.g., 20% of 150 is 150 * 0.20 = 30).