http://aa.usno.navy.mil/solareclips...1&lat_deg=37&lat_min=12&lat_sec=51&height=120
If you want to know the length of the eclipse at your location.
You will need coordinates in degrees minutes and seconds of your location.
Go to Google maps.
Drop pin on house
Then get coordinates
If you get degrees, minutes and seconds you are good to go.
Let's say it gives you 37.109876
You will need to convert.
.109876 multiply by 60
6.952
Multiply .952 by 60
57.1
37 6 mins 57.1 seconds North
Do the same with longitude.
Click link
Enter coordinates and elevation
You will get data on your point.
You will need to click back to form or is this.
http://aa.usno.navy.mil/data/docs/SolarEclipses.php
Enter data in B.
Make sure to enter lat long correctly or you will be in Greenland.