Percentage Calculator
Find percentages, compare numbers, and calculate percentage change without reaching for a spreadsheet.
Enter values and click Calculate.
How to use this calculator
- Enter the base number in the first field.
- Enter the percentage (or second number) in the second field.
- Choose the operation: what is X% of Y, X is what % of Y, or percentage change from X to Y.
- Click Calculate to see the result and a step-by-step breakdown.
When people use this
- Splitting a bill or tip quickly in your head.
- Analysing price changes during sales or inflation.
- Working out exam or assignment scores as a percentage.
- Budgeting: what portion of income goes to rent, food, or savings.
Examples
- What is 15% of 200? → 30
- 25 is what % of 200? → 12.5%
- % change from 80 to 100 → +25% increase
- % change from 120 to 90 → −25% decrease
FAQ
What does X% of Y mean?It means X hundredths of Y. For example, 20% of 150 = 0.20 × 150 = 30.
How do I calculate percentage change?Subtract the old value from the new value, divide by the absolute old value, then multiply by 100.
Can percentages be more than 100%?Yes — values over 100% are common, e.g. sales growth of 150%.
What if the base number is zero?Percentage change from zero is undefined (division by zero). The calculator shows a warning.
Is there a difference between 'percentage' and 'percent'?No — they mean the same thing. Percent means 'per hundred'.