# P-T Calculator

> Reference

Canonical page: [https://chrome-stats.com/d/id1252176525](https://chrome-stats.com/d/id1252176525)

## Overview

- **ID:** `id1252176525`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** National Refrigerants Inc.
- **Category:** Reference
- **Rating:** 4.80 / 5 (52 ratings)
- **Version:** 1.31
- **Last updated:** 2026-08-21
- **First published:** 2018-01-04
- **Size:** 5.85 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/p-t-calculator/id1252176525)
- **Website:** [https://www.refrigerants.com](https://www.refrigerants.com/)
- **Privacy policy:** [https://refrigerants.com/resources/privacy-policy/](https://refrigerants.com/resources/privacy-policy/)

## Description

P-T Calculator by National Refrigerants offers a comprehensive HVAC/R pressure/temperature calculator. It computes pressure/temperature relationships or superheat/subcool values, updating automatically as you input pressure or temperature; for refrigerant blends, both saturated vapor and saturated liquid data are shown. A blended display on the superheat/subcool screen visualizes entering, midpoint, and outlet temperatures.

Extras include automatic altitude correction if location services are enabled, English/Metric units, a Favorites refrigerants list, and quick links to NRI resources (Lubricant Cross Reference, Branch Locator).

## Rankings

- #170,309 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1252176525)