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Free Percentage Change Calculator

Calculate the percentage increase or decrease between two values.

Enter two values to see the percentage increase or decrease between them. It is handy for prices, sales and growth.

How to use the Percentage Change Calculator

  1. Select your country at the top of the page so the currency, tax names and rates match where you do business.
  2. Enter your numbers. Every result updates instantly and each line of the working is shown so you can check it.
  3. Use the PDF or print button to keep a record, and change one input at a time to compare scenarios.

What is the Percentage Change Calculator?

Quick, transparent maths helps you price, budget and plan taxes with confidence. Showing every step of a calculation makes the result easy to check and explain.

The Percentage Change Calculator is built for freelancers, small business owners and busy teams who want a professional result without installing software or creating an account.

Signplify tools run in your browser, so there is no signup, no watermark and no limit on how often you use it.

Getting started with the Percentage Change Calculator

Using the percentage change calculator takes a minute or two. Your progress is saved in this browser, so you can come back later.

Tips for better results

Treat every result as an estimate. Real tax depends on your full circumstances such as other income, credits and deductions.

Try best and worst cases. Run the numbers with a slightly lower price or higher cost to see how safe your margin is.

Check the tax year shown under the result. Rates and thresholds change, and the calculator notes which year its figures come from.

Privacy and where your data goes

Documents and files you use here are processed on your own device. Signplify does not receive what you type or the files you open, which makes it suitable for sensitive information. If you clear your browser data, any saved draft is removed.

Frequently asked questions

What do I enter in the percentage change calculator?

You enter Old Value and New Value. The result updates as you type, so you can change one number and see the effect straight away.

What result does the percentage change calculator give for example numbers?

With the starting example (Old Value 80 and New Value 100), it shows Percentage change of 25.00%, along with Absolute change 20 and Direction Increase. These are the US defaults; change the inputs to match your own situation.

How accurate is the percentage change calculator?

It is an estimate based on the numbers you enter and the rates or formulas built into the tool. It is meant for planning and comparing options, so check important figures against official sources or a qualified professional before you rely on them.

Can I save or share the result from the percentage change calculator?

Yes. Copy result puts the figures on your clipboard as text, and you can also download the result as a PDF or PNG, or print it. Your inputs are remembered in this browser for next time.

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