RED launched two new RED Calc Pro tools — Pitot Tube Airflow and Units Calculator. Check out the tool guides: Pitot Tool Guide and Units Tool Guide or try them free with our 30-day free trial.
New Pitot Tube Airflow Tool
This is an improved and expanded version of our free tool. Instead of entering the k-factor for your pitot tube, you select your model from a dropdown list. RED has done the background research to find reliable k-factors for 27 different pitot tube models. The list includes both single-port and averaging pitot tubes. See the Pitot Tube Airflow Tool Guide for the complete list.
Above, Figure 1, is a screenshot of the new Pro Pitot Tube Airflow tool showing the required inputs and the dropdown menu for the pitot tube devices included.


New Units Calculator Tool
With the new Pro Units Calculator, you can convert from one unit to another for 20 unit categories, including Length, Area, Volume, Energy, Power, Pressure, Flow, and 13 others. For example, within the units category of Length, you can convert from “inches” to “centimeters”, as shown in Figure 4, below. See the Units Calculator Tool Guide for a complete list of categories and units.

You can use Math on-the-fly for the starting input value. For calculations with no units, you can choose “Calculator – Unitless” as the “Units category”. You may use the following for calculations: “+” (addition); “-” (subtraction);”*” (multiplication); “/” (division); “^” (exponent); and “( )” parenthesis.
Because the Pro tools include reports, you are able to document important calculations with this feature. Of course, as usual, Math on-the-fly is available in almost all of the input boxes for RED Calc Pro — and RED Calc Free — tools.