Choosing the correct sundial

Horizontal sundials need to have the angle between the gnomon (which casts the shadow) and the dialplate appropriate to the latitude where they are to be used. If you do not know the latitude of your location, you can find it out from the links on our latitude page. The Original Spot-on Sundial is made in seven models, and the Large Spot-on Sundials come in the London latitude.

Latitude degree 
Suitable for use between latitudes:
A: Newcastle on Tyne
 55° N   
53.25 to 58° N
B: London
51° 30' N 
49.75 to 53.25° N
C: Vienna   
48° N 
45.5 to 49.75°N
D: Milwaukee 
43° N 
40.5 to 45.5° N
E: San Francisco 
37° 45' N 
36 to 40.5° N
F: Los Angeles
34° N
32 to 36° N
G: New Orleans 
30° N 
26 to 32° N
S: Cape Town  
34° S
27 to 41° S


If you prefer a map of North America or Europe, see below.