Price elasticity compares proportional quantity change with proportional price change.
Price Elasticity of Demand Calculator
Form
Results
Price Elasticity of Demand
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Initial Revenue
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Final Revenue
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Revenue Increase
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Table of Contents
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What is Price Elasticity of Demand ?
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How to Use This Calculator
- Enter or select Initial Price, Initial Quantity, Final Price, Final Quantity.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Elasticity = percentage quantity change/percentage price change
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Variables Explained
| Input | What it means |
|---|---|
| Initial Price | The stated purchase or selling amount, in the same currency as the related costs. |
| Initial Quantity | Number of identical pieces, units or sections to include. |
| Final Price | The stated purchase or selling amount, in the same currency as the related costs. |
| Final Quantity | Number of identical pieces, units or sections to include. |
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Worked Example
A 10% price rise with a 20% quantity fall gives elasticity −2 using the same baseline convention.
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Why Use This Calculator?
Compare the result with the underlying statement, budget or proposed transaction. It is most useful when every amount uses the same reporting period and the same accounting definition.
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Common Mistakes
- Initial-value and midpoint methods differ; do not mix their percentages.
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Frequently Asked Questions
Should I use monthly or annual figures?
Use one consistent period for every amount and rate in the relationship. If a form specifies an annual rate or a monthly amount, follow that label rather than mixing time periods.
Does the result include fees and tax?
Only the costs and taxes represented by the inputs and formula are included. A real transaction can include other charges, so compare the estimate with the underlying agreement or statement.
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Sources & References
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