Percentage Change Calculator

What is Percentage Change Calculator?

A percentage change calculator shows how much a value has increased or decreased as a percentage of its original value.

It is used everywhere — price changes, salary hikes, stock moves, and business metrics.

How does the Percentage Change Calculator work?

The calculator subtracts the old value from the new value and divides by the old value.

A positive result is an increase; a negative result is a decrease.

How to use the Percentage Change Calculator?

1. Enter the old (original) value.
2. Enter the new value.
3. The calculator shows the percentage change and absolute difference.

Example

Benefits of using the Percentage Change Calculator

• Quantify price and value movements.
• Compare growth across periods.
• Report changes accurately.

Who should use the Percentage Change Calculator?

• Students practising problems and verifying homework answers.
• Teachers preparing examples and checking student work.
• Engineers and analysts who need quick, reliable calculations.
• Anyone who wants to double-check manual arithmetic.

Tips for getting the most out of the Percentage Change Calculator

• Check your inputs for typos — a single wrong digit changes the result completely.
• Use the result to verify your manual working, not to replace understanding.
• Try a simple case first (like 0 or 1) to make sure the output makes sense.

Frequently Asked Questions

This calculator turns a tedious calculation into an instant answer, so you can focus on understanding the concept instead of the arithmetic.