Percentage Calculator
Percentage Calculator
Standard Percentage Calculator
Calculate percentages in different ways based on the values you provide.
Results
Enter values and click Calculate to see the results
Related Tools
What is a Percentage Calculator?
A percentage calculator is an online tool that simplifies common percentage calculations. Percentages are a way to express a value as a fraction of 100, making it easier to compare relative values. Our calculator offers three distinct calculation modes to handle all your percentage needs.
The standard calculator allows you to find what percentage one number is of another, calculate a percentage of a number, or determine what value would give you a specific percentage. Our tool handles all these calculations instantly and shows the formulas used.
Additionally, our calculator includes specialized modes for percentage difference and percentage change calculations, which are commonly used in financial analysis, statistics, and everyday comparisons. Whether you're calculating discounts, tax, interest, or analyzing data trends, this free online percentage calculator provides accurate results with clear explanations.
Common Uses for a Percentage Calculator
Shopping and Discounts
Quickly calculate sale prices and discounts using the standard percentage calculator. Find out how much you'll save on items with percentage-off promotions, or determine the original price of an item that's been discounted. This helps you make more informed purchasing decisions and avoid mental math errors.
Financial Analysis
Use the percentage change calculator to analyze investment growth, stock performance, or budget variations over time. Compare the percentage change between different time periods to identify trends and make better financial decisions. The percentage calculator provides clear results with formulas so you understand the calculations.
Academic and Statistical Work
Calculate grade percentages, statistical distributions, or research results with precision. The percentage difference calculator is particularly useful when comparing data sets or research outcomes. Students can use the calculator to determine what score they need on a final exam to achieve a desired grade.
Business and Tax Calculations
Businesses can use the percentage calculator for tax calculations, profit margins, growth rates, and performance metrics. Calculate sales tax, VAT, or GST with the standard calculator, then use the percentage change tool to track business growth metrics over time. The clear layout makes it easy to use for quick business decisions.
Frequently Asked Questions
How do I calculate a percentage of a number?
To calculate a percentage of a number, select the "Standard" tab in our calculator, enter the value in the "Value" field and the percentage in the "Percentage" field, then click "Calculate." The calculator will show you what the specified percentage of your value is. For example, to find 15% of 200, enter 200 as the value and 15 as the percentage. The formula used is (Percentage ÷ 100) × Value, which in this case would be (15 ÷ 100) × 200 = 30.
What's the difference between percentage difference and percentage change?
Percentage difference and percentage change are two different calculations used in different contexts. Percentage difference compares two values without considering which came first, making it ideal for comparing similar items. It's calculated as the absolute difference divided by the average of the two values. Percentage change, on the other hand, shows how a value has increased or decreased from an original value over time. It's calculated as (New Value - Original Value) ÷ Original Value × 100. Our calculator includes both modes with clear explanations of which to use depending on your needs.
How do I calculate what percentage one number is of another?
To find what percentage one number is of another, use the "Standard" calculator tab. Enter the first number (the part) as the "Value" and the second number (the total) as the "Percentage." The calculator will show you what percentage the first number is of the second. For example, if you want to know what percentage 25 is of 100, enter 25 as the value and 100 as the percentage. The formula used is (Value ÷ Total) × 100, which gives you (25 ÷ 100) × 100 = 25%. Our calculator automatically provides this calculation along with a clear explanation.
Can I calculate a percentage increase or decrease with this tool?
Yes, our calculator includes a specific "Percentage Change" tab designed for calculating increases and decreases. Enter the original value and the new value, then click "Calculate Change." The calculator will show you both the percentage change and whether it's an increase or decrease. For example, if a price changed from $80 to $100, enter 80 as the original value and 100 as the new value. The result will show a 25% increase. The calculator color-codes the results (green for increases, red for decreases) and provides the formula used: (New Value - Original Value) ÷ |Original Value| × 100.
Are the calculations rounded in any way?
Our percentage calculator performs exact calculations but displays results rounded to two decimal places for readability. This level of precision is sufficient for most everyday uses while keeping the results easy to understand. The underlying calculations are performed with full floating-point precision before rounding for display. If you need greater precision for specialized applications, the formulas are provided so you can perform the calculations manually with as many decimal places as required. For financial calculations in particular, the two decimal places align with standard currency representation.