Percentage Calculator
Calculate percentages, percentage of a number, percentage increase/decrease, and more
Calculate percentages quickly and easily. Find what percent one number is of another, calculate percentage of a number, or determine percentage increase and decrease.
Calculator Inputs
Choose the type of percentage calculation you need
Enter the first number
Enter the second number
Results
Enter values above to see your results
How It Works
Choose your calculation type, enter your numbers, and get instant results. The calculator handles all common percentage calculations with clear explanations.
Tips & Best Practices
- •To find what % X is of Y: divide X by Y and multiply by 100
- •To find X% of Y: multiply Y by X and divide by 100
- •Percentage increase = ((New - Old) / Old) × 100
- •A 50% increase followed by a 50% decrease does not return to the original value
- •When comparing percentages, consider the base values for context
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. Formula: ((New - Original) / Original) × 100
What's the difference between percentage point and percent?
Percentage points are absolute differences. If something goes from 10% to 15%, that's a 5 percentage point increase but a 50% relative increase.
How do I calculate what percent one number is of another?
Divide the first number by the second number, then multiply by 100. For example: 25 is what % of 200? (25 ÷ 200) × 100 = 12.5%
Can I calculate percentage decrease?
Yes! Use the percentage change calculator. If the result is negative, it represents a percentage decrease.
Related Calculators
Unit Rate Calculator
Calculate price per unit to find the best deal. Compare two products easily.
Law of Cosines Calculator
Solve for a missing side or angle in any triangle using the Law of Cosines. Supports SAS and SSS cases.
Linear Interpolation Calculator
Find a value between two known points using linear interpolation formula.
Factorial Calculator
Calculate the factorial of a number (n!). Supports large numbers.