📊 Free Percentage Calculator
Percentages are used every day — from discounts at stores to grade scores and business reports. Our Free Percentage Calculator allows you to quickly find percentages, calculate percentage increases and decreases, measure percentage differences, and more.
What is X% of Y?
Percentage Increase / Decrease
Percentage Change
Percentage Difference
Why Use This Percentage Calculator?
Our tool is more than just a simple calculator; it's a suite of tools designed to handle all common percentage calculations. It's perfect for:
- Finance: Calculating interest, profit margins, or investment returns.
- Shopping: Quickly figuring out discounts and sales tax.
- Education: Helping students check homework or understand how to calculate percentage formulas.
- Business: Tracking growth with the percentage increase calculator or analyzing data with the percentage change calculator.
Related Tools
- Donation Value Calculator – For calculating tax-deductible contributions.
- Tax Deduction Calculator – A broader tool for various tax calculations.
Formulas and Examples
How to calculate percentage of a number
To find what is X% of a number Y, the formula is (X / 100) * Y. For example, to find 20% of 150: `(20 / 100) * 150 = 30`.
How to calculate percentage increase
The percentage increase calculator uses the formula: `((New Value - Old Value) / Old Value) * 100`. For example, if a salary increases from $2,000 to $2,400, the increase is `(($2400 - $2000) / $2000) * 100 = 20%`.
Percentage Difference Calculator
The percentage difference calculator finds the difference relative to the average of the two numbers. The formula is: `(|Value 1 - Value 2| / ((Value 1 + Value 2) / 2)) * 100`. For 40 and 50, the difference is `(|40 - 50| / 45) * 100 = 22.22%`.
FAQs – Percentage Calculator
Q1: How to calculate percentage of a number?
A: To calculate percentage of a number, you divide the 'part' by the 'whole' and then multiply by 100. For example, to find what percentage 25 is of 50, you calculate `(25 / 50) * 100 = 50%`.
Q2: What is a percentage difference calculator?
A: A percentage difference calculator is used to compare two values where neither is explicitly the "original" value. It measures how different they are in relation to their average, which is useful in scientific and statistical comparisons.
Q3: How do I calculate percentage change?
A: A percentage change calculator uses the formula: `((New Value - Old Value) / Old Value) * 100`. This is the same method used by the percentage increase/decrease calculator and is ideal for tracking changes over time.