Percentage Calculator - Free Online Percentage Tool
Calculate percentages, percentage changes, and percentage differences. Free online percentage calculator.
About Percentage Calculator
Calculate percentages, percentage changes, and percentage differences between values.
- Calculate what percentage one number is of another
- Find percentage increase or decrease between values
- Calculate relative percentage difference
- Copy results to clipboard
About Percentage Calculator
Calculate percentages, percentage changes, and percentage differences. Free online percentage calculator. Percentage Calculator is a free online tool by NeXiilo — no sign-up required, and everything runs privately in your browser.
Whether you use it daily for work or occasionally for a quick task, Percentage Calculator gives you fast, accurate results without uploading your data anywhere.
How to Use Percentage Calculator
- Open the Percentage Calculator above — paste or enter your input.
- Adjust any options to match what you need.
- Get instant results right in your browser.
- Copy or reuse the output wherever you need it.
📖 Learn more: Percentage Guide — percent, change & difference →
Related Tools
Grade Calculator
Calculate GPA and percentage with multiple grading scales
Unit Converter
Convert between length, weight, temperature, and volume units
BMI Calculator
Calculate Body Mass Index with health category
Frequently Asked Questions
How do I calculate percentage?
Basic percentage: (Part / Whole) × 100. For example, to find what percentage 25 is of 200: (25 / 200) × 100 = 12.5%. The tool automates these calculations.
What is percentage change?
Percentage change measures how much a value has increased or decreased relative to its original value. Formula: ((New Value - Old Value) / Old Value) × 100. Positive results indicate increase, negative indicates decrease.
How do I calculate percentage difference?
Percentage difference compares two values by finding the absolute difference relative to their average: (|Value1 - Value2| / ((Value1 + Value2) / 2)) × 100. Useful for comparing two distinct values.
Can I calculate percentage of a number?
Yes, to find X% of a number: (X / 100) × Number. For example, 15% of 200 = (15 / 100) × 200 = 30. The calculator handles this automatically.
When is percentage change positive or negative?
Percentage change is positive when the new value is greater than the old value (increase). It is negative when the new value is less than the old value (decrease).