DeveloperToolsKitBETA

Percentage Calculator

Calculate percentages, percentage changes, and solve various percentage problems with ease.

What is X% of Y?

Calculate what percentage of a number equals to. Example: What is 15% of 200?

Advanced Percentage Calculator & Analysis Tool

Comprehensive percentage calculations for business, finance, and academic applications. Calculate percentages, changes, and proportions with precision and ease.

Multiple Calculation Types

Four essential percentage calculations: basic percentages, proportions, changes, and additions/subtractions.

Change Analysis

Calculate percentage increases and decreases with visual indicators for growth and decline trends.

Precision Results

Accurate calculations with proper rounding and formatting for professional and academic use.

Business & Finance Applications

  • Sales & Revenue Analysis

    Calculate sales growth, revenue changes, and performance metrics

  • Financial Planning

    Determine interest rates, investment returns, and budget allocations

  • Discount & Pricing

    Calculate discounts, markups, and pricing strategies for retail

  • Performance Metrics

    Analyze KPIs, conversion rates, and business performance indicators

Calculation Types & Formulas

Basic Percentage
(Percentage × Total) ÷ 100
Find X% of a number (e.g., 15% of 200 = 30)
Proportion Calculation
(Value ÷ Total) × 100
What percent is X of Y (e.g., 30 is 15% of 200)
Percentage Change
((New - Old) ÷ Old) × 100
Calculate increase/decrease between two values
Add/Subtract Percentage
Value ± (Value × Percentage ÷ 100)
Add or subtract a percentage from a value

📊 Percentage Calculation Tips

• Double-check your base value

Ensure you're using the correct denominator

• Consider context for changes

Large percentage changes on small numbers can be misleading

• Round appropriately

Match precision to your use case and audience

• Verify with reverse calculations

Check your work by calculating backwards

💾Bookmark this tool for later use
• Press Ctrl+D (Cmd+D on Mac)