Member Login

Contact Us
telephone US +1 617 5008224
telephone EU +44 113 8152220
post/email Forum or Email
Like this Page?

Follow Us
Follow us on twitter. Follow us on LinkedIn. Follow us on YouTube.
Our Feeds
Repository RSS. Forum RSS. User Comment RSS. News RSS.

Who's Online

We have 16 guests and 40 members online

Total Downloads


Enter Amount:

Signup Now! Subscribe, login and start downloading. Latest Calculations! Follow us on Twitter.

XlXtrFun Extra Functions for Microsoft Excel

This Excel calculation can be downloaded by ExcelCalcs subscribers.Please login or Subscribe.


XlXtrFun™ Extra Functions for Microsoft Excel

Three Dimensional Interpolate and Extrapolate Functions; Two Dimensional Interpolate, Extrapolate, Cubic Spline, Polynomial Curve Fitting, Line Intersections, Minima, Maxima, First Derivative, Second Derivative, and other functions.Free download.

XlXtrFun.xll is a collection of functions which extends the capabilities of Microsoft Excel; developed primarily to facilitate, interpolation of 2-dimensional and 3-dimensional data, and simplify 2-variable curve fitting. XlXtrFun has been used for years by engineering and research and development personnel on every continent who need to interpolate, extrapolate, and curve fit data rapidly, reliably, and with a virtually non-existent learning curve.

If you work with real-life data and want to interpolate, extrapolate, or curve fit, then you will find these functions very useful.

Calculation Reference

Version History

Check the version history to see how this calculation has changed over time.

Submitted On:
21 Aug 2008
Submitted By:
File Date:
16 Feb 2007
File Version:
File HomePage:
Click to visit site
stars/4.gifTotal Votes:7
HTML Link:
Copy code below to your web page to create link to this page:
HTML Window:
Copy code below to your web page to create a dynamic window to this download:
Like This?:
View the profile of the person who submitted this calculation and see all their other calculations hosted at ExcelCalcs.
Need Help?:
Use the comment feature below to raise any questions relating to this download. The question will be automatically emailed the author and all users subscribing to this comment thread.


#6 JohnDoyle 2013-11-19 16:40
This is in fact just a link to the XlXtrFun website. You can down load the file from there as they like you to register with them.
#5 Theo Rorije 2013-11-19 15:52
Hello John,

When I want to use your spreadsheet:
Clevis_and_lug_ design_Peterson s_v1.2.xls
I need XlXtrFun.
On the website I tried to download several times the file XlXtrFun
but with no result!
Do you have a download?

Kind regards,

Theo Rorije
#4 Chang 2009-01-14 05:10
Great !!! Thanks ~
#3 kiranmaske 2007-11-21 03:10
#2 terryjft 2007-03-15 14:13
This is a must have if you want to automate nomagraphs in a spreadsheet.

Please sign in or register to add a comment.

Getting Started with ExcelWraps

The first thing to realise is that Wraps are accessed through your own ExcelWraps subdomain. You’ll become administrator of your subdomain and set up your users with at least one ‘role’. For example Unipart roles link to their competence management system (Production Operative 2,...

RIP Paperwork

ExcelWraps replaces all paper records at Unipart A quantum leap for the Hitachi 395 bogie overhaul as paper is superseded by Wraps. Now information is immediately available through the cloud and shared across Unipart, with its clients and its subcontractors. Bogie overhaul consists of 20 ...

Wabtec ExcelWraps Subdomain is Launched

We are delighted to launch from where Wabtec will be trialing wraps to monitor their rail overhaul business. Wabtec Rail undertakes the overhaul, refurbishment and conversion of all types of locomotive, passenger rolling stock and freight wagon bogies. Services includ...

Feedback from HitachiWraps Openday

HitachiWraps Open Day Feedback - We were very pleased to look through the positive comments in your feedback wraps. On Friday immediately after the event we were asked to present to the Unipart board so I guess it could not be more positive than this. A cross section of organisations across t...

HitachiWraps Open Day Wednesday March 12th 2014

  The high speed Class 395 fleet services are orchestrated from the Hitachi Rail depot in Ashford. The management team have a vision of replacing  clipboards with iPads so that the depot, their suppliers and clients can share live information. Hitachi engineers make spreadsheets wh...

Date to be Set for HitachiWraps Open Day

  The high speed Class 395 fleet services are orchestrated from the Hitachi Rail depot in Ashford. The management team have a vision of replacing  clipboards with iPads so that the depot, their suppliers and clients can share live information. Hitachi engineers make spreadsheets wh...

Introducing ExcelWraps

Just imagine if you could design your own App linked to a cloud data engine and working on any PC, tablet or smartphone……well now you can! You design your App in Excel. We make it device independent. We supercharge with our cloud data engine. You control access...

Training Courses For London Underground

"Thanks again for your excellent course this past week." "Thank you for the course last week, found it very interesting both from the perspective of a quick refresh, but also on how we can optimise the work we do." "Thanks for a very interesting and usef...

Try Excel 2013 for Free!

I am pleased to report that XLC Ribbon works with the 32bit and 64 bit versions of Excel 2013 obtained using the free Office 365 Home Premium Preview. Excel 2013 looks a little flat and dull compared to previous versions but I think this is the influence of the new Windows 8 'metro' look and f...