How long does it take to earn a black belt in judo?And in karate? ?

Judo, usually 4-5 years, some can do it in 2-3 and some take a little longer. Karate has a HUGE range, anywhere from 2-3 for a McDojo to 8-10 for a more traditional school. |||It personally took me 4 years but it really just depends on where you are training and how they do things there. Where in some places they may take things slower but other places do things a lot faster. |||on average its about 2.5-6 years for both as far as i know. but it also depends on how much you train and if you have talent or skills.|||depending on how good you are. Judo is a bit longer 3 1/2 maybe while Karate is about 3.|||Anything under 4 years/2-3 classes a week I consider a mcdojo.|||it depends how often you grade and high you are allowed to grade to