Percentage Calculator

Percentage Calculator is a free online tool to calculate percentages.

Calculate Percentage Change

How to Use

  • Enter the old value and the new value.
  • Click Calculate to get the percentage change.

Frequently Asked Questions

  • Q: What is percentage change?
    A: Percentage change shows how much a value has increased or decreased in percentage terms.
  • Q: What values are required?
    A: Both old value and new value are required, and old value must not be zero.
  • Q: Can the values be negative or zero?
    A: Both values must be greater than zero for a meaningful calculation.

Calculation Basis

The percentage change is calculated as:
Percentage Change = (New Value - Old Value) / Old Value × 100%