TriLookup Add-In for Excel
As of March 27, 2020, TriLookup is free for all future and current users, without any restrictions as to the type of use or the number of users. To register and activate your free copy of TriLookup please use the credentials below.
Registered User Name: TRILOOKUP
We have also made the full 64 version of TriLookup available for free download. The 64 version doesn't require registration.
The source code is still protected, but we are planning to eventually change TriLookup to Open Source. If you would like to get an earlier access to the TriLookup source code, please contact us at email@example.com
TriLookup is an add-in for Microsoft® Excel for Windows version 97 or higher and Excel for Macintosh version 98 or higher (except version 2008). When installed, TriLookup adds eleven powerful lookup and interpolation worksheet functions to Excel, which offer greatly enhanced functionality compared to Excel's built-in lookup functions. You can use them to perform simple table lookup, as well as, interpolation and extrapolation from tables with one, two or three independent variables.
The newly released TriLookupLite and TriLookupLite Mac are freeware editions, which only allow linear interpolation. You can use them to evaluate TriLookup. If you only require linear interpolation, you can keep using TriLookupLite and TriLookupLite Mac for free indefinitely!
TriLookup has been used since 2003 worldwide by universities and hi-tech companies See a partial list here.
The animated chart on the right shows a series of 3D surfaces plotted from the values returned by the T3LOOKUP function. Each individual surface in the series is calculated for a constant Z value.
TriLookup add-in package includes a comprehensive online help and a couple of example spreadsheets that demonstrate the capabilities and the proper usage of the added functions. You can access the online help and example files by selecting TriLookup Help from Excel’s Help menu.
TriLookup and TriLookupLite Editions
Starting in version 3.0, Trimill introduced TriLookupLite, as a Freeware edition of TriLookup. The differences between TriLookup and TriLookupLite are outlined in the table below:
Apart from the differences outlined above, the eleven TriLookup worksheet functions work exactly the same way on both TriLookup and TriLookupLite.
The evaluation version of TriLookup is fully functional and differs from the registered version only by displaying "TriLookup splash screen" every time you start Excel.
Implementations of TriLookup and TriLookupLite
TriLookup and TriLookupLite editions are available in three different implementations:
The eleven TriLookup worksheet functions work exactly the same way on both Windows and Macintosh, on all supported versions of Excel.
The differences between 32 Win, 64 Win and Mac implementations of TriLookup and TriLookupLite are shown in the table below:
You can also view or download TriLookup User's Guide in pdf format. In order to view this file you must have Adobe® Acrobat® Reader installed on your computer.
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