How long should each belt take? The honest answer.

White → blue: 1-2 years for most adults. Faster if you train 4+ days/week and have wrestling/judo background. Blue → purple: 1.5-3 years. This is where most people quit. Purple → brown: 2-4 years. Brown → black: 1-3 years.

Total: 6-12 years for most. Less for the talented + obsessed. More for the part-time + life-busy.

The real answer: when your professor says you're ready. Anything else is internet noise. But knowing the rough range helps with patience.