SRS1 Cubic Spline: Excel Data Interpolation Add-in

Key Features

• This is free software that adds cubic spline and linear interpolation functions to Microsoft Excel.
• It is simple to use because the new functions work just like all other existing Excel functions.
• The new functions can be used for data analysis, forecasting, and many other applications.
• See http://www.SRS1Software.com for demos and more information.

Technical Specifications

• **Publisher:** Srs1software.com
• **License:** Freeware
• **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
• **Last Updated:** October 15, 2025
• **Category:** Business / Utilities