Download the calculator here and extract from the zip file.
You will need to enable the macros for the calculator to work:
- Click on enable edit (shown in top bar)
- Click enable content
Microsoft may block macros on your computer. To unblock:
- Open Windows File Explorer and go to the folder where you saved the file.
- Right-click the file and choose Properties from the context menu.
- At the bottom of the General tab, select the Unblock checkbox and select OK.