Percentage Calculator
Solve any everyday percentage problem instantly. This percentage calculator covers the three most common questions: what is X% of a number, what percent one number is of another, and the percentage change between two values. Each mode shows its formula so you can understand — not just get — the answer.
Calculators
Private by default
This tool runs entirely in your browser. Your data is never uploaded to a server.
How to use
3 clear steps.
Pick the question you're answering (e.g. "What is X% of Y?").
Enter the two numbers.
Read the result and the formula used to compute it.
Good to know
Frequently asked questions
- How do I calculate a percentage of a number?
- Multiply the number by the percentage and divide by 100. For example, 15% of 80 = 80 × 15 / 100 = 12.
- How do I calculate percentage increase?
- Subtract the old value from the new value, divide by the old value, then multiply by 100: (new − old) / old × 100. Going from 50 to 65 is a 30% increase.
- What's the difference between percentage points and percent?
- Going from 10% to 15% is an increase of 5 percentage points, but a 50% relative increase. Percentage points compare absolute differences between percentages; percent compares relative change.