Percentage Calculator

Calculate percentages, percentage changes, and percentage of values.

Percentage Calculator

Calculate percentages, percentage changes, and percentage of values with ease

Calculation Types

Calculator

What percentage is this number:

Of this number:

💡 Percentage Calculation Tips

• Percentage of: Divide the part by the whole and multiply by 100
• Percentage change: (New - Original) ÷ Original × 100
• Increase by percentage: Original × (1 + Percentage/100)
• Decrease by percentage: Original × (1 - Percentage/100)

About This Calculator

Calculate percentages, percentage increase/decrease, and part-to-whole values. Useful for sales, grades, commissions, and conversion rates. The tricky part in real life is choosing the right base: percent off a price, percent of a total, and percent change between two periods are three different questions—this tool helps you keep them separate.

Formula

Percent of value: (p/100) * x; Percentage change: ((new - old) / old) * 100

Example

To find 18% of 250, compute (18/100) * 250 = 45.

When to Use

Discount and markup checks
Growth rate calculations
Comparing old vs new values

Best Practices

Use the exact original value for change calculations
Keep sign (+/-) to know growth vs decline
For finance, round only in the final step

FAQ

What is percentage point vs percent change?

Percentage points are direct differences (e.g., 10% to 12% is +2 points). Percent change compares relative growth (20%).

Why is my percentage change huge?

When the original value is very small, even a small absolute change can produce a large percent change.

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