Price Increase/Decrease Calculator

Measure the change between an old price and a new price. Enter your own values below to see price change and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Percentage price change = (new − old) ÷ old × 100.

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What is Price Increase/Decrease Calculator?

Price Increase/Decrease Calculator helps you measure the change between an old price and a new price.

The main result is price change. The formula, example and assumptions below explain how to interpret it.

How to use Price Increase/Decrease Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather previous price (₹) and new price (₹). Use values from the same situation or reporting period.
  2. Replace the example previous price with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read price change. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter previous price in ₹, at least 0. Decimals are accepted.
  • Enter new price in ₹, at least 0. Decimals are accepted.

Price Increase/Decrease Calculator: a worked example

With the inputs below, the result is 20 % (price change). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Previous price (₹)₹100
New price (₹)₹120
Price change20 %

Understanding the Price Increase/Decrease result

The main output is price change, expressed in %. It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

Price Increase/Decrease Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Include unavoidable fees when comparing prices. A percentage saving alone may hide a smaller pack or a shorter validity period.

For wider guidance, visit Department of Consumer Affairs. The formula and scope of this specific tool are stated on this page.

Price Increase/Decrease Calculator FAQs

What does Price Increase/Decrease Calculator calculate?

Price Increase/Decrease Calculator helps you measure the change between an old price and a new price. Its main output is price change in %.

What inputs do I need for Price Increase/Decrease Calculator?

You need previous price (₹) and new price (₹). Use the field labels and units to match your figures to the formula.

Which formula does Price Increase/Decrease Calculator use?

Percentage price change = (new − old) ÷ old × 100.

What is a worked example for Price Increase/Decrease Calculator?

Example inputs: Previous price: ₹100; New price: ₹120. The result is 20 % (price change).

How should I enter previous price?

Enter previous price in ₹, at least 0. Decimals are accepted.

How do I choose new price?

Enter new price in ₹, at least 0. Decimals are accepted. The example uses ₹120; replace it if your circumstances differ.

How should I read price change?

The main output is price change, expressed in %. It applies to the inputs and operation you selected.

Why might my Price Increase/Decrease Calculator result differ from my records?

Include unavoidable fees when comparing prices. A percentage saving alone may hide a smaller pack or a shorter validity period. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Price Increase/Decrease Calculator?

Yes. Note your first price change, change previous price or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Price Increase/Decrease Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.