This page holds a set of simple but useful tools that help automate some of the calculations described in the book Return On Software, Addison Wesley, 2005. PC users can save these files to their computer by right-clicking on the link and selecting "Save Target As..."

This material is Copyright © 2004-2005 Stephen R Tockey. Permission is hereby given to copy, adapt, and distribute this material as long as this notice is included on all such materials and the materials are not sold, licensed, or otherwise distributed for commercial gain.

These tools are being distributed "as-is". No warrantee is expressed or implied. While the author believes that these tools give correct answers, the user assumes all risk of use.

After Tax Cash Flow Calculator
Tool (.XLS)    |    User Guide (.TXT)

Analytic Hierarchy Process Calculator
Tool (.XLS)    |    User Guide (.TXT)

Annual Percentage Rates Calculator
Tool (.XLS)    |    User Guide (.TXT)

Asset Retirement Calculator
Tool (.XLS)    |    User Guide (.TXT)

Cone of Uncertainty Calculator
Tool (.XLS)    |    User Guide (.TXT)

Economic Life Calculator
Tool (.XLS)    |    User Guide (.TXT)

Incremental Benefit-Cost Calculator
Tool (.XLS)    |    User Guide (.TXT)

Interest Table Generator
Tool (.XLS)    |    User Guide (.TXT)

Linear Interpolator
Tool (.XLS)    |    User Guide (.TXT)

Loan Amortization Calculator
Tool (.XLS)    |    User Guide (.TXT)

Present Worth, Internal Rate of Return, and Project Balance Calculator
Tool (.XLS)    |    User Guide (.TXT)

Decisions Under Uncertainty Calculator
Tool (.XLS)    |    User Guide (.TXT)

US Federal Corporate Income Tax Calculator
Tool (.XLS)    |    User Guide (.TXT)