Expanding the Power of Excel

Industry standard models built-in with support for designing and sharing your own models.

Buy nowStart free trial

Simple, Fast & Accurate Data

XLfit® is a Microsoft® Excel add-in for Windows that brings the power of scientific mathematics and statistics to Excel, together with supporting charting capabilities. XLfit is the leading statistical and curve fitting package for Excel and is used by the world’s leading pharmaceutical, chemical, engineering industries, research institutions and validated by the National Physical Laboratory (NPL).

There are over 70 out-of-the-box models for both linear and non linear curve fitting available in XLfit, including all commonly used models for describing data from drug discovery related experiments. An unlimited number of custom or user-defined models may be added.

Expanding the Power of Excel

Linear and nonlinear modelling, interactive 3D and 2D charting, automatic and interactive point knock out. Features every scientist needs out of the box.

Buy nowStart free trial

XLfit is the curve-fitting application of preference for thousands of users who choose it to complement their existing Excel spreadsheets.

Independently validated by the UK National Physical Laboratory (NPL) and the US National Institute of Standards & Technology (NIST), XLfit allows company statisticians to validate results more rapidly than other statistical packages.

  • Instantly visualize curve fits applied to data with XLfit’s interactive chart preview allowing you to apply or discard chart edits before outputting charts to the worksheet
  • Rapid ‘point-and-click’ chart building and editing guides you through the curve-fitting process from start to finish
  • Two-dimensional and three-dimensional curve fitting from within the Excel user interface
  • Enhanced selection of mathematical models and techniques allow generation of required results rapidly, including three-dimensional modeling, global fitting throughout a range of data sets and automatic data point rejection
  • Export charts as editable ‘objects’ into other Microsoft Office applications for subsequent display, manipulation and editing

XLfit is a powerful curve-fitting and data analysis package that integrates completely with Microsoft® Excel. XLfit offers an extensive selection of data analysis and calculation tools, including a superior range of fit and statistics models as well as charts and graphs to visualize, interpret and present experimental data, all in Excel.

XLfit works within the familiar Excel spreadsheet environment to enable curve fitting and statistical analysis. At the heart of XLfit is a powerful curve-fitting engine that allows linear and non-linear curve fits, smoothing, statistics, weighting and error bars. XLfit allows rapid analysis of data and generation of crucial information about a fit, including 2D and 3D graphical representation and full statistical analysis.

Key benefits of XLfit

Excel integration

Powerful curve fitting and statistical analysis that integrates completely with Excel

New and interactive chart types

Edit charts using easily accessible context-sensitive menus and instantly preview changes before applying to the worksheet

Numerically validated

Independent validation from the UK National Physical Laboratory means that company statisticians can validate XLfit rapidly

Enhanced mathematical methods and techniques

New models facilitate the generation of required results, such as PA2, global fitting, automatic outlier rejection and many more

Easy migration

XLfit ensures backwards compatibility with earlier versions of XLfit, enabling individual or batch migration of workbooks

Buy nowStart free trial

Purchase XLfit

IDBS product registration and purchasing

Welcome to the IDBS online registration and payments center.

xlfit commercial

XLfit 5 Commercial License

XLfit for commercial use


Buy now
xlift academic

XLfit 5 Academic License

XLfit for academic use


Buy now
xlfit commercial


Access to XLfit E-learning material


Buy now

Interested in a free trial of XLfit?

If you would like a free trial of XLfit, please fill in the form below and click submit. We will be in touch with you shortly with instructions on how to access your free trial.

Start free trial

XLfit Support

If you are experiencing a problem with XLfit, please review the pages and FAQs below prior to contacting XLfit Support, to ensure we can best help you with any issues or questions you may have.

Online Help

Read more

Support portal

Read more

E-learning Course Overview

Download PDF

FAQs/Quick Start Guides

Read more

XLfit Keycode Request

Register here

IDBS Support

Looking for IDBS support?

Go to Log in

Contact us

Get in touch with your general enquiries and you’ll hear back from us without delay. Got a technical query? Please visit the customer support portal using the link at the top of this page or email us.

Contact us