Extension Cost Calculator

Introduction: Are you planning to expand your living space with a new extension but unsure about the cost? Look no further! The Extension Cost Calculator is here to help you estimate the expenses associated with your extension project.

Formula: To calculate the cost of your extension, we use the following formula: Total Cost = Length (in meters) x Width (in meters) x Cost per square meter ($)

How to Use:

  1. Enter the length of your extension in meters.
  2. Enter the width of your extension in meters.
  3. Specify the cost per square meter in dollars.
  4. Click the “Calculate” button, and the tool will display the estimated total cost.

Example: Let’s say you want to build a 5-meter long and 4-meter wide extension with a cost of $150 per square meter. After entering these values into the calculator and clicking “Calculate,” you will find that the estimated total cost is $3,000.


  1. Q: What is the Extension Cost Calculator? A: The Extension Cost Calculator is a tool designed to help you estimate the total cost of building an extension to your property.
  2. Q: Is this calculator accurate? A: The calculator provides an estimate based on the information you provide. For precise costs, consult a professional contractor.
  3. Q: Can I use this calculator for commercial projects? A: Yes, you can use it for residential and commercial extension projects.
  4. Q: Is this calculator free to use? A: Yes, it’s completely free to use, and no downloads or installations are required.
  5. Q: Can I save my calculations? A: No, this calculator doesn’t have a save feature. Be sure to write down your results.

Conclusion: The Extension Cost Calculator is a handy tool for getting a quick estimate of your extension project’s expenses. However, keep in mind that this is just an approximation, and actual costs may vary based on various factors. For precise quotes, consider consulting with construction professionals. Happy planning!

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