EarthDial Calculator

Enter your latitude below, then click on the "Calculate!" button. The EarthDial Calculator will calculate all of the angles and distances that you need to construct the lines on your EarthDial.

To find your latitude and longitude, consult a good map or visit:

• Entire world: http://www.getty.edu/research/conducting_research/vocabularies/tgn/

• Entire world except USA: http://www.calle.com/world/index.html

• USA Only: http://www.census.gov/cgi-bin/gazetteer

CAUTION: This table will not work well for latitudes smaller than 4 degrees. An alternative construction method for EarthDials located close to the equator will be posted here shortly.

Distance CG:	cm
Hour Line Angles B
12 noon:	degrees
11 am, 1 pm:	degrees
10 am, 2 pm:	degrees
9 am, 3 pm:	degrees
8 am, 4 pm:	degrees
7 am, 5 pm:	degrees
6 am, 6 pm:	degrees

Date Curve Points
	Distance CS	Distance CE	Distance CW
12 noon:	cm	cm	cm
11 am, 1 pm:	cm	cm	cm
10 am, 2 pm:	cm	cm	cm
9 am, 3 pm:	cm	cm	cm
8 am, 4 pm:	cm	cm	cm
7 am, 5 pm:	cm	cm	cm
6 am, 6 pm:	cm	cm	cm

These are general illustrations for your guidance. The patterns you see are not drawn for the latitude you entered.