How much time does weed stay in your urine/blood/hair?

Cannabis: Single use Marijuana may be found in blood for 12 to 24 hours. Regular Use Marijuana may be found in blood for 2 to 7 days. Single use Marijuana might be detected in urine for 1 to 7 days (or more) and regular marijuana use can be detected in urine for 7 to 100 days (longer periods have been reported though).Cannabis may be detected via hair follicle for months.