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Percentage Decrease Calculator

Get the percent decline between two numbers.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Percentage decrease measures how much a value has fallen relative to its original, calculated as (original value − new value) / original value × 100. Unlike a simple difference, expressing a drop as a percentage makes it comparable across completely different scales — a $5 drop means very different things on a $10 item versus a $500 item, but the percentage decrease puts both on the same footing.

This calculation shows up constantly: retailers advertise discounts as percentage off, analysts report declining sales or revenue period over period, and anyone tracking a falling stock price, shrinking population, or a weight-loss goal needs the percent change rather than the raw number. This calculator takes your original and new values and returns the percentage decrease between them.

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