Percentage Calculator — Solve Any Percentage Problem Instantly
From discounts to grade calculations, percentages come up constantly. Get instant, accurate results for any percentage calculation.
Percentage calculations show up everywhere: figuring out a discount price, calculating a tip, determining what percentage one number is of another, or finding the percentage increase or decrease between two values.
Our Percentage Calculator handles the most common percentage calculations — find a percentage of a number, find what percentage one number is of another, and calculate percentage increase or decrease — instantly and accurately.
🛠 Ready to try it? Use the Percentage Calculator now — free, no signup required.
Open Percentage Calculator →How to Use the Percentage Calculator
- Open the Percentage Calculator tool.
- Choose the type of calculation you need (e.g., 'X% of Y', 'X is what % of Y', or percentage change).
- Enter the relevant numbers into the input fields.
- View the calculated result instantly.
Common Use Cases
- Calculating a discount amount during a sale (e.g., 20% off a price).
- Figuring out what percentage of a budget has been spent.
- Calculating percentage increase or decrease between two values (e.g., sales growth).
- Determining a tip amount at a restaurant.
- Calculating a test or exam score as a percentage.
Frequently Asked Questions
How do I calculate a percentage increase?
Percentage increase is calculated as ((new value - old value) / old value) × 100 — our calculator does this automatically when you select the percentage change option and enter both values.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100 — for example, 30 is what percentage of 120 is calculated as (30 / 120) × 100 = 25%.
How do I calculate X% of a number?
Multiply the number by the percentage and divide by 100 — for example, 20% of 150 is (150 × 20) / 100 = 30.
Can I calculate percentage decrease the same way as increase?
Yes, the formula is the same — ((new value - old value) / old value) × 100 — a negative result indicates a percentage decrease.
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🛠 Try the Percentage Calculator now — free, fast, and works right in your browser.
Open Percentage Calculator →