# Weather Calc

> Weather

Canonical page: [https://chrome-stats.com/d/id305762968](https://chrome-stats.com/d/id305762968)

## Overview

- **ID:** `id305762968`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Black Cat Systems
- **Category:** Weather
- **Rating:** 4.50 / 5 (4 ratings)
- **Version:** 3.0
- **Last updated:** 2025-07-28
- **First published:** 2009-02-25
- **Size:** 4.16 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/weather-calc/id305762968)
- **Website:** [http://www.blackcatsystems.com/iphone/weather\_calculator.html](http://www.blackcatsystems.com/iphone/weather_calculator.html)
- **Privacy policy:** [http://blackcatsystems.com/iphone/privacy\_policy.html](http://blackcatsystems.com/iphone/privacy_policy.html)

## Description

If you’re a pilot, you often need to make lots of weather related calculations. Now there’s an easy solution, as close as your iPhone. 

Weather Calc performs the following weather relation calculations: 
 
Altimeter Setting - compute the altimeter setting based on elevation and station pressure 
Cricket Temperature - just for fun! This lets you estimate the temperature based on the chirp rate of a cricket
Heat Index - compute the heat index based on the temperature and relative humidity 
Pressure - convert between hPa, atmospheres, psi, and inches and mm of mercury (Hg) 
Relative Humidity - compute the wet bulb and dewpoint based on the temperature, pressure, and relative humidity 
Speed Of Sound - displays the speed of sound in various units, given the temperature
Standard Atmosphere - compute the temperature, pressure, density, viscosity, speed of sound, and more 
Station Pressure - compute the station pressure based on the elevation and altimeter setting. 
Temperature - convert between degrees Fahrenheit, Celsius, Kelvin, and Rankine 
Virtual Temperature - compute the virtual temperature based on the temperature, dewpoint, and pressure 
Vapor Pressure - com[ute the saturated and actual vapor pressure, as well as relative humidity 
Wet Bulb - compute the dewpoint and relative humidity based on the temperature, pressure, and wet bulb reading 
Wind Chill - compute the wind chill based on the temperature and wind speed 
Wind Speed - convert between knots, kilometers/hour, meters/second, miles/hour, feet/second 

Buy your copy now, and let Weather Calc take the drugery out of weather related calculations.

## Rankings

- #505,898 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id305762968)