Percentage Calculator
Text & Code · Free Online Tool
Calculate percentages, increases, and decreases.
What percent is X of Y?
X ÷ Y × 100
What is X% of Y?
X ÷ 100 × Y
Percentage change from X to Y
(Y − X) ÷ X × 100
Three Modes
Percent of, percent value, and percentage change — all in one place.
Live Results
Every result recalculates instantly as you edit the inputs.
Private
All math runs in your browser — no data ever leaves your device.
How to Use Percentage Calculator
- 1Enter or paste your text or code into the input area.
- 2Choose the desired operation (format, convert, analyze, etc.).
- 3Click the action button to process.
- 4Copy the result from the output area.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
Can I format code in different styles?
Yes, the SQL Formatter and other code tools support multiple formatting options and indentation styles.
Is regex testing case-sensitive?
The Regex Tester supports case-sensitive and case-insensitive matching, along with global and multiline flags.
Related Tools
Text Counter
Count characters, words, lines, paragraphs.
Text Cleaner
Remove extra spaces, blank lines, and breaks.
Case Converter
Convert to UPPER, lower, camelCase, snake_case.
Markdown Previewer
Preview Markdown rendered as HTML in real time.
HTML ↔ Markdown
Convert between HTML and Markdown.
Code Diff
Compare two text snippets and highlight differences.
Learn the concept
Learn the concept
Understand the programming ideas behind this tool.