Professional Percentage Calculator

How to Use This Calculator

Choose the calculator that matches your needs below. Simply enter your numbers and click "Calculate" to get instant results. Each calculator solves a different type of percentage problem!

What is X% of Y?

Find the percentage of a number. Perfect for calculating discounts, tips, or portions.
Example: What is 20% of $150? Answer: $30

What is % of ?

Result:

X is what % of Y?

Calculate what percentage one number is of another. Great for grades, statistics, or comparing values.
Example: 45 is what % of 180? Answer: 25%

is what % of ?

Result:

X is Y% of what?

Find the total when you know a part and its percentage. Useful for reverse calculations and finding original amounts.
Example: 30 is 15% of what? Answer: 200

is % of what?

Result:

Common Use Cases

💰 Shopping & Discounts

Calculate sale prices and savings

🍽️ Tips & Gratuity

Figure out restaurant tips quickly

📊 Business & Finance

Analyze profit margins and growth

🎓 Grades & Scores

Calculate test scores and averages