Percentage Calculator
Free online percentage calculator. Calculate X% of Y, percentage change, and percentage increase/decrease instantly with formulas.
How do I calculate a percentage?
To find what percent X is of Y, divide X by Y and multiply by 100. Formula: (X ÷ Y) × 100 = percentage
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, and multiply by 100. Formula: ((New - Original) ÷ Original) × 100
How do I find X% of a number?
Multiply the number by the percentage and divide by 100. Formula: (X ÷ 100) × Y = result
What is the difference between percentage and percentile?
A percentage is a fraction of 100. A percentile is a value below which a certain percentage of data falls. They are different concepts.
How do I calculate percentage decrease?
Subtract the new value from the original value, divide by the original value, and multiply by 100. Formula: ((Original - New) ÷ Original) × 100
What are common uses of percentage calculations?
Percentages are used for discounts, tax calculations, tip calculations, interest rates, grade calculations, statistical analysis, and financial planning.
How do I convert a fraction to a percentage?
Divide the numerator by the denominator, then multiply by 100. For example, 3/4 = 0.75 × 100 = 75%
How do I convert a decimal to a percentage?
Multiply the decimal by 100 and add the percent symbol. For example, 0.65 × 100 = 65%
Can percentages be greater than 100?
Yes, percentages can exceed 100%. For example, 150% means 1.5 times the original amount. This is common in growth calculations.
How do I calculate percentage change between two values?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result indicates increase, negative indicates decrease.
What is the formula for percentage difference?
Percentage difference = (|Value1 - Value2| ÷ ((Value1 + Value2) ÷ 2)) × 100. This measures the relative difference between two values.
How to Use Percentage Calculator
Calculate X% of Y, percentage change, and percentage increase or decrease right in your browser. Every computation runs locally, so nothing you type is ever uploaded.
- Pick a calculation mode, such as X% of Y, percentage change, or percentage increase/decrease.
- In the X% of Y mode, enter the percentage and the base value to get the result instantly, for example 15% of 200 equals 30.
- For percentage change, type the old value and the new value to see the difference expressed as a percent.
- Use the increase/decrease mode to compare two numbers and read both the absolute difference and the relative change.
- Check the formula shown with each result to understand exactly how the percentage was derived.
To reverse a calculation, divide the result by the percentage expressed as a decimal; for instance 30 ÷ 0.15 gives you back 200.
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