Hi Harleygirl -
<<"You stated that the fares on the timetables already include a 50% discount since Swiss residents already have a half fare card. However since I am coming from the US and am not a Swiss resident, how do I find out the correct fares?">>
Enter your start point and destination in the timetable as explained above.
At the right of each journey is a box labeled "Fare/Buy"
For Zürich to Wengen, the fare shown just above the box is 41.70 CHF one way. That is the fare for someone with a half-fare reduction.
Click on the red box that says "Fare/Buy" The "Ticket Shop" will open.
You will get a menu such as I have attached in a screen grab.
By the way, the reason that it asks for a birthday, (which you will enter as day. month. year, not the US mode of month/day/year) is because there are age related discounts on certain types of journeys.
I have filled in fictitious data.
At the right, where you see a red arrow that I have added to the screen grab, click on the "please select" arrow head beneath the word "reduction."
Select "No Reduction."
You will observe that the computer returns 83.40 CHF.
That is the non-reduced fare that you can use in the spreadsheet where you can apply a reduction or not, as you choose.
Or, you can simply accept the "Half fare travelcard" entry if you only need to know the value for that single journey if you carry a half-fare discount card.
Let us know if that works for you.
By the way, I never use the spreadsheet which the forum moderators Arno and Annika have provided. I am a forum member, but not a moderator. Although I am a US resident, at this time a carry a longer term Half-Fare card currently available to those with a Swiss address. So, I never do the calculations. For me, the half-fare reduction is on average, the best for my use, so I just buy a ticket. The ticket machines all have a place to select 1/2 fare or full fare.... I simply select "half-fare" or the icon for the reduction.