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home/Knowledge Base/Advanced Techniques/How To Calculate Age From Date Of Birth
Popular Search:Getting Started

How To Calculate Age From Date Of Birth

598 views 6 August 15, 2020 admin

As of now, Easy Forms has a special feature that would let you calculate the age using the date of birth quickly.

To get started, we are going to create a Form with a Date field (Label: Date of Birth), a Number field (Age), and a Submit button. Your form should look like this screenshot:

Calculate Age From Date Of Birth

Now go to the Rule Builder (Forms > Actions > Conditional rules) and click “Add rule”.

1. Name: Calculate Age From Date Of Birth
2. Click “Add condition” > Date of Birth is present
3. Click “Add action” > Evaluate
5. Formula: differenceInYears(now(), {{date_1}})
6. Set Result to Field: Age.

Your Rule should look like this screenshot:

Conditional Rule To Calculate Age From Date Of Birth

Note: The differenceInYears() function calculates the number of years between two dates. Then we use the now() function to obtain the first date and the second date is obtained from the Date field.

That’s all!

Now your form should look like this:

Calculate Age From Date Of Birth

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Advanced Techniques
  • How To Calculate Age From Date Of Birth
  • Compare Date fields: How to ensure that Finish Date is at least equal to *or after* Start Date, and *not* before?
  • How to embed a Form using iFrame code
  • Dynamic Content: Conditional Logic with Dates
  • Date Based Conditional Logic
  • Calculate Difference of Time between Two Time fields
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Popular Search:Getting Started