Calculators / Percentage Calculator

Percentage Calculator

Calculate percentages, find percentage increases or decreases, and compare numbers in seconds. Enter your values, get a clear answer, and see the formula used.

✓ No file uploads ✓ No sign-up ✓ Free to use

Choose a calculation

Select what you want to work out.

Find a percentage of a number

Enter a percentage and the number to calculate it from.

Percentage

Number

Enter numbers up to 1 trillion in absolute value. Use a dot for decimals. No commas or currency symbols.

Your result

Your calculated result will appear here.

How to use

Choose the type of percentage calculation.
Enter your numbers in the labeled fields.
Click Calculate to see your answer.
Copy the result or reset to start again.

Quick example

What is 20% of 250?

250 × 20 ÷ 100 = 50

Your inputs stay in this browser

Calculations run locally using JavaScript. This widget does not send your numbers to a server, use analytics, or save your inputs in cookies or browser storage.

A LITTLE KNOW-HOW

Percentage Calculator – Calculate Percentages Online

About the Percentage Calculator

The Percentage Calculator from I Love Tools is a free online tool for working out percentages, percentage differences, increases, and decreases.

Whether you’re calculating a shopping discount, checking how much a price has increased, reviewing exam marks, or comparing business figures, this tool helps you find the answer without manually working through every calculation.

You can use it to find a percentage of a number, determine what percentage one number represents of another, calculate percentage changes between two values, or increase and decrease an amount by a chosen percentage.

Each calculation includes a readable result, a short explanation, and the formula used. No account, installation, or file upload is required.

Frequently asked questions

How do I calculate a percentage of a number?

Choose Percentage of, enter the percentage in the first field and the number in the second field, then click Calculate. For example, 25% of 200 is 50.

How do I calculate a percentage increase?

Choose % Change, enter the original value and the new value, and click Calculate. If the new value is higher than the original, the calculator shows a percentage increase.

How do I calculate a percentage decrease?

Choose % Change and enter the original and new values. For example, a decrease from 500 to 400 is a 20% decrease. To reduce a number by a chosen percentage instead, use Adjust by % and select Decrease.

Can I calculate percentages above 100%?

Yes. For example, 150% of 80 is 120. Percentages above 100% are useful when comparing quantities greater than a reference value.

Why can't I calculate percentage change from zero?

Percentage change requires dividing by the original value. When the original value is zero, the calculation involves division by zero, so the standard percentage-change formula is undefined.

Does the Percentage Calculator save my numbers?

No. The widget does not store your numbers in browser storage, use cookies, or send them to a server. It processes them locally while you use the page.