FAQ: I want to automatically calculate age from birthdate when registering/updating the edit screen
## Answer
This can be achieved with a "[Server Script](/en/manual/table-management-server-script)".
---
## Overview
Enter a birthday and calculate the current age when registering or updating data. Below is a sample in which the current age calculated based on the birthday entered in the "Date A" field is inserted into "Number A".
## How to use
1. Create a "record table".
1. Open the Editor tab from the Table Management in Management and enable "Date A" and "Number A".
1. "Create a new" "[Server Script](/en/manual/table-management-server-script)" below. For "[Server Script Condition](/en/manual/server-script-conditions)", select "After formula".
## Sample Code
##### JavaScript
```
function CalculateAge(birthdayVal) {
return Math.floor((ConvertDateToNum(new Date()) - ConvertDateToNum(new Date(birthdayVal))) / 10000);
}
function ConvertDateToNum (date) {
return date.getFullYear() * 10000 + (date.getMonth() + 1) * 100 + date.getDate();
}
if (utilities.InRange(model.DateA)) {
model.NumA = CalculateAge(model.DateA)
} else {
model.NumA = 0;
}
```
## Related Information
<div id="ManualList"><ul><li><a href="/en/manual/table-management-server-script">Table Management: Server Script</a><span>08.13.2024 up</span></li></ul></article>
<ul><li><a href="/en/manual/server-script-conditions">Developer Function: Server Script: Condition</a><span>08.14.2024 up</span></li></ul></article></div><input id="SearchTextHidden" type="hidden" value="" />
