If you’re looking to calculate rental income based on factors like property value, ROI, and tax percentage, Gravity Forms can help you set up a dynamic calculator that does the math for you. In this tutorial, we’ll walk you through the steps to build a calculator that calculates both monthly and yearly rental values based on user inputs.

Why Use Gravity Forms for Calculations?

Gravity Forms is a versatile plugin for WordPress that lets you create custom forms with various input types, conditional logic, and even calculations. Using these features, you can easily set up a form that calculates rental prices dynamically.

Step 1: Setting Up Your Form

Start by creating a new form in Gravity Forms:

  1. Go to Forms > New Form and give your form a name, like “Rental Calculator.”

Step 2: Add the Necessary Fields

Add the following fields to your form:

  1. Number Field for “Asset Net Value” (Property Value)
    • Label: “Asset Net Value”
    • Field ID: 1
  2. Number Field for “ROI (%)”
    • Label: “ROI”
    • Field ID: 2
  3. Number Field for “Tax Percentage (%)”
    • Label: “Tax Percentage”
    • Field ID: 3
  4. Number Field for “Yearly Rental” (calculated result)
    • Label: “Yearly Rental”
    • Field ID: 4
  5. Number Field for “Monthly Rental” (calculated result)
    • Label: “Monthly Rental”
    • Field ID: 5

Step 3: Enable Calculations for Yearly and Monthly Rental

Now, configure the calculations for the “Yearly Rental” and “Monthly Rental” fields.

Yearly Rental Calculation

Set up the formula to calculate the yearly rental based on the ROI and tax percentage:

Explanation:

  • {:1} is the Asset Net Value.
  • {:2} is the ROI percentage.
  • {:3} is the Tax Percentage.
  • The formula calculates the income based on ROI and subtracts the tax calculated on that income.

Monthly Rental Calculation

To find the monthly rental, divide the yearly calculation by 12:

Step 4: Customize Your Form with Sliders

To make the form more user-friendly, use sliders for fields like Asset Net Value, ROI, and Tax Percentage:

  1. You can use the Gravity Forms Range Slider add-on to turn number fields into sliders.
  2. Configure the min/max values and step increments to match realistic values for each field.

Step 5: Test Your Calculator

Preview the form and try different inputs to ensure the calculations work correctly. Fine-tune the slider settings and adjust the calculation formulas as needed.

Additional Tips for Advanced Use

  • Conditional Logic: Show or hide certain fields based on the user’s input.
  • JavaScript Customization: For more interactive updates, you can use JavaScript to add custom dynamic behaviors.

Conclusion

With Gravity Forms, setting up a dynamic rental calculator is straightforward. By configuring your fields properly and using calculation formulas, you can provide an interactive tool for your users that makes calculating rental income easy. Whether you’re a real estate agent, landlord, or just someone who wants to calculate potential rental income, this approach will give you the flexibility you need.