can someone tell me what these things mean on dt spoke calc

Pitch circle diameter
le.
ri.

Flange distance
le.
ri.

Ø of spoke hole

No. of spokes

No. of intersections




On another spoke calculator i got of sheldon browns website, it seems to ask for the distance from the centre of the wheel to the flanges, im confused. surely on a front wheel, and a fixed back wheel, the spokes are equal length on both sides, as you dont have to dish it?
cheers

The first is the diameter of the hub flanges at the spoke holes - left & right.
Second is the distance of the flanges from the center of the hub - left & right.
Third is the diameter of the spoke holes themselves.
No. of spokes is hust that.
No. of intersections is the cross pattern.

sorry to be stupid, but how does one find the sentre of the hub?

The center of the hub is the over-locknut span divided by two. For a hub meant for non-dished used (track hubs, internally geared hubs, single-speed hubs), this will be the center of the hub body. For hubs for derailleur gears, this will be offset. The center will be closer to the driveside flange.

so the flange distance should be the same on a track hub...but it is slightly off centre because of the sprocket.
am i just being stupid, im just confused..

Rear track hubs are either symmetrical, or close enough that the spoke length between the left and right sides will be within a fraction of a millimeter of each other.

A track hub will be symmetrical. The threaded portion is small enough that it's worth it to add a little extra width outside the non-driveside flange to get a symmetrical hub and a stronger wheel.