---
title: "Use Atlas for calculators and diagnostic tests with Field Pro in mobile"
slug: "use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-1"
tags: ["Area - Field Mobile App (FMA)", "Area - ST Mobile (Legacy)", "Focus - Service Replacement", "Role - Technician", "Type - Commercial", "Type - Residential"]
updated: 2026-05-07T17:55:50Z
published: 2026-05-07T17:55:50Z
---

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

# Use Atlas for calculators and diagnostic tests with Field Pro in mobile

## Overview

Use Atlas in Field Pro on mobile to run diagnostic tests and perform common HVAC calculations. This helps you quickly verify system performance on the job. You can complete these calculations directly in Atlas on mobile, with 9 calculators available covering airflow, pressure, and other common diagnostic needs.

---

### 

#### Who uses this feature

- Technicians
- Primarily for Residential Service and Commercial Service business types

#### Feature configuration

- Account configuration, [office setup for Field Pro](/v1/docs/field-pro), and [office setup for Atlas in Field Pro](/v1/docs/enable-atlas-in-field-pro-for-technicians) are required to use this feature. Please contact your office for details.

## Things to know

- **Data and privacy:**

Atlas is powered by [Titan Intelligence (TI)](/v1/docs/titan-intelligence-overview). It may generate inaccurate, incomplete, or outdated responses. Verify details before acting and don’t treat it as professional advice. Your conversations may be stored to improve the service. Avoid sharing sensitive information.

By using Atlas, you agree to use this feature responsibly, and further acknowledge and agree that any data collected will be used in accordance with our [Privacy Policy](https://www.servicetitan.com/legal/privacy-policy) and may be shared with third-party service providers.
- You can access *Calculators and Diagnostic tests* from *Atlas* in both ServiceTitan Mobile and the ServiceTitan Field Mobile App. Atlas is not currently available in the Inventory Mobile App.
- *Calculators and Diagnostic tests* is available only for *Commercial HVAC*and*Residential HVAC*businesses.

## Use Atlas for calculators and diagnostic tests with Field Pro in mobile

1. Open a job.
2. Tap ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/icon-atlas-gradient.png) **Ask Atlas**. ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-image-wq4azbwq.png)
3. On the*Atlas*screen that opens, tap **Calculators & Diagnostic Tests**. ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-image-o35wxmkp.png)
4. Select one of the following:
  1. *Airflow Calculator*
  2. *SuperHeat*
  3. *Airflow Diagnostic*
  4. *SubCool*
  5. *Duct Sizing Calculator*
  6. *Nitrogen Pressure Test*
  7. *Pressure Set Points*
  8. *TXV Size Calculator ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-image-ly2jx19m.png)*
5. Enter the required information in the requested fields, such as *Return Air*, *Supply Air*, and *Nominal Tons*.

> [!NOTE]
> **Note:**The fields vary depending on the tool you select.

![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-image-cp17w91y.png)
6. Tap**Submit**and review the results.
7. Tap **Back**![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/icon-keyboard-arrow-left.png)if you want to use another tool or calculator. ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/use-atlas-for-calculators-and-diagnostic-tests-with-field-pro-in-mobile-image-qs4lvnfh.png)

## Want to learn more?

- See [Use Atlas for equipment information with Field Pro in mobile](/v1/docs/use-atlas-for-equipment-information-with-field-pro-in-mobile)
- See [Use Atlas for troubleshooting with Field Pro in mobile](/v1/docs/use-atlas-for-troubleshooting-with-field-pro-in-mobile)
- See [Use Atlas to find replacement parts with Field Pro in mobile](/v1/docs/use-atlas-to-find-replacement-parts-with-field-pro-in-mobile)