Right time and place. Score!

[Tom Morookian]

So I'm cheap. I've had my wooden toe in checker for years. The bottom end has a fixed screw in it. The top end is drilled to let the 1/4 threaded rod slide thru. The nut allows me to adjust the length of the rod.

take the measurement on the front of the wheel ( I put the screw on the rim) and adjust the nut so it hits the wood. Then move it to the rear of the wheel. The nut should be about 1/8 inch from the wood and that's 1/8th toe-in. A bigger version can be used to guesstimate camber.

If you want to do the math, you can calculate degrees based on the rim width.