If your miter saw doesn’t have a digital readout, there’s no need upgrade to a newer saw. iGaging’s digital miter saw gauge fits in the blade slot and rests against the fence to let you set your angles to an accuracy of ±0.1°. Of course, it isn’t as convenient as a built-in gauge since you have to remove it before you can use the saw.
The digital display has a resolution of 0.05°, a range of ±50°, and a hold function. The body is made from solid aluminum and has an adjustable locking device to fit blade slots from 5/16″ to 7/8″.
A 2″ engineer square and a 3V battery are included with the gauge. Eagle America — the only place we could find it — regularly sells it for $50, but it’s on sale for $40 and $9 shipping if you use their cheapest option.