How to Calculate a Percentage

Use this free Percentage Calculator to quickly calculate percentages, percentage increase, percentage decrease, and percentage change. This tool is ideal for students, business owners, and everyday calculations. All results are instant and work on any device.

To calculate a percentage manually, use this formula:

Percentage = (Part ÷ Whole) × 100

Example:
If you want to know what 20% of 150 is:

(20 ÷ 100) × 150 = 30

Percentage Calculator FAQs

What is a percentage?

A percentage is a number expressed as a fraction of 100. It is commonly used to compare values or show changes.

Can I use this calculator on my phone?

Yes! This percentage calculator is fully mobile-friendly and works on all devices.

Is this calculator free?

Yes, Calculator4Me tools are 100% free and require no sign-up.