---
title: "How to Calculate Contact Age Using a Profile-Based Operation"
slug: "calculate-contacts-ages"
updated: 2025-09-03T13:40:20Z
published: 2025-09-03T13:40:20Z
canonical: "docs.mapp.com/calculate-contacts-ages"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Calculate Contact Age Using a Profile-Based Operation

## Goal

To calculate the current biological age of your contacts, based on their date of birth.

## Background Information​

An operation is a type of profile-based automation. An operation consists of expression language applied to a profile attribute with the data type string, number or date. Use an operation to extract or modify data stored in an attribute.

## Procedure

1. In ​Administration​, create a new custom user attribute with the name ​CurrentAge​. The data type is ​**Number**​.
2. In ​Automation​, create a new **profile-based automation** with the type ​**Operation**​. The target attribute is ​**CurrentAge**​. The operation has the following expression.

```plaintext
${ecm:age(date.today,user.DateOfBirth)}
```
3. Click the ​**Save**​ button.
4. Select the profile-based automation and click the ​**Activate**​ button. ⇒ The profile-based automation is now active.
5. Click the ​**Apply Automations**​ button. ⇒ Engage applies the automation to all contacts in the system. This can take a long time. An email notifies you when the automation is finished.