How long does Marijuana stay in your System?

This question is asked by many different people, and for good reason. Marijuana is the most commonly used and tested for drug in the United States and several other countries as well. Marijuana is also the drug that is more likely to stay in your system for days, weeks, or even an entire month after the last time that you smoke. Therefore, even though marijuana is one of the least harmful drugs out there, it is also the most likely drug to cause you to fail a drug test.When you ask the question “How long does marijuana stay in your system?” you need to take into account the fact that there is no simple answer to this question. Quite simply, it’s argued both that THC never leaves your brain, as well as that there are several different factors which can affect whether or not you test positive for marijuana use.

The speed at which marijuana leaves your body depends both on the speed of your metabolism, as well as on the half life of THC. Unlike most other substances, the half-life of THC can vary quite a bit, depending on who is using it, when it’s used, and several other factors. For example, it’s estimated that THC can have a half life that ranges anywhere from 1-10 days. It’s almost impossible to find out what that half life is, which means that it is very difficult to use it to calculate how long it will take for all of the THC to leave your body.

Not only that, but your metabolism and how much marijuana you smoked will also have an effect on the length of time that it will take you before you can test without testing positive for marijuana use. After all, the half-life is only the length of time that it takes for you to lose half of the THC that is in your system. If you’ve smoked a lot of marijuana, then it will take you longer before the THC in your body drops back below the amount that is detectable by most drug tests.

The most common period of time is anywhere from 3-30 days

For this reason, when you ask “how long does marijuana stay in your system?” you have to realize that it’s very unlikely that you’ll be able to get a usable answer. The most common period of time is anywhere from 3-30 days, depending on your metabolism and the amount of marijuana that you’ve smoked. This is unfortunate, since it means that while most drug tests can only turn up evidence of other drugs if you’ve been taking the drug within a few days of the drug test, marijuana could still be detected in a urine test up to a month after the last time it is used.

Hair tests are even worse, since your body stores THC in the hair follicles. For this reason, the previous answers to “How long does marijuana stay in your system?” are only useful if you’re going to be forced to take a urine test. For the hair test, depending on the amount of hair that the company takes, it’s possible that marijuana could be detected up to three years after the last time that you smoke.

If you’re worried about testing positive for marijuana, then you should definitely invest in some of the great products that will help you to test negative for marijuana use. This is due to the fact that it takes so long for the THC to leave your system that you’ll probably test positive if you do not. If you don’t have an entire month to wait before you need to take the test, then you should definitely think about some other options to keep from testing positive.

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60 Responses to “How long does Marijuana stay in your System?”

  1. chester380@yahoo.com Reply January 2, 2013 at 7:09 pm

    I WEIGHT 135 LBS. AND HAVENT SMOKED IN 11 DAYS I CONSIDER MYSELF TO HAVE A HIGH BODY METABALISM.DO YOU THINK I COULD PASS A DRUG TEST NOW?

  2. No. I do not nor have ever smoked but I am a certified drug tester. THC can show up in your urine from 1 to 11 weeks. A good rule of thumb though is 30 days.

  3. I weigh 156 and I smoked right much then stopped and after 37 days I still had 53 nano units in my system so I failed the drug test. Probation office told a friend of mine that it usually takes 45 days for it to be out of ur system if ur an every day smoker

  4. I have been smoking pot continusly since august. I jave a urin drug testin 19 days. What is the best product for me, & do they test for cleaners in urine? I need answers please.

  5. if i only took one hit and the rest was 2nd hand how long would it take 2 get out of my system?

  6. I smoked only one or two puffs in a day for four days, I weigh 160lbs. 5’9 in height. About how long will it take for me to get it out out of my system?

  7. I passed a urine thc test 7 days after smoking. I weigh 150 and smoke almost every day. The only thing I did was drink a full 8 cup pot of coffee each day and drank 1gallon of water the morning of the test.

    • coffee? thats good, maybe i’ll do that, i know coffee has a lot of caffeine in it, and i pee (sorry if i sound disturbing) so much after i have coffee, thanks for that idea!

  8. What if I took maybe 3 puffs in the last month and I have been off it for 10 days, do you think I will get busted?

    • Chances are you should be fine – although you never know. Make sure to drink lots of fluids! Please make sure to come back and let us know how you do! good luck!

  9. I need to pass a hair test for a job. I use to smoke weed every day but been clean for 5 months and I have long hair. Am worried need to pass ..is there anyway I can pass??

  10. I’m 5’2 126lbs smoked for two weeks straight. I only would take 2-3puffs of med potent weed at night so I could destress and sleep but I was offered a job and need to take a test on monday. I have been drinking alot of water. Will I be ok or should I be worried?

  11. I way 108 pounds, eat five times a day or whatever i see in front me that looks good, workout three times a week, drink 3 water bottles a day. For the last 7 months I stopped smoking every day. Now I smoke somewhere around 1 to 2 times a month. Last time I smoked was monday on the 28. I’ve been eating and drinking water, and peeing a crap load, when is it safe for me to take a urine or blood test?

  12. lets say i only took one hit yesterday….. when would it be out of my system?

  13. I took about six hits of regular weed about 8 days ago. About two weeks before that I eat adout four rice crispy treats that had regular pot in it. Before that I hadn’t smoked for years. How long you think I am gonna be dirty?

  14. I am 5 3 and wight 216 PDs I took two hits off of a joint and took a drug test twenty two days later do u think it will show up in my urine drug screen.

  15. I took one hit that’s it and have a test in 21 days wouldit b in my system

  16. OKAY thank you just to be safe should i drink alot of cranberry.juice like everyone tells me

  17. I used to smoke a few times a week but only a few puffs. I stopped smoking four weeks ago and i am a slim male that has been working out several times a week and drinking plenty of fluids. Do you think i will test positive for a pre employment drug test?

  18. I took a bite of a brownie even though its was small
    I still got very stoned and I do not smoke
    At all so I just need to know how long it
    Will stay in my system..

  19. I use to smoke everyday, & I’ve been clean for 50 days. I’m 5’8 and weigh 200lbs. Will I test positive?

  20. do you know if a job wont hire you if you have the mariuana card.

  21. I smoked a few puffs a three weeks ago and just took a urin test…
    Should I be worried? I w 130

  22. I took a few hits of weed for the first time 31 days before my drug test. It was a urine test, and I am 5 11 170lbs. Am I good? I exercise 5 times a week and always drink plenty of water.

  23. I am 5’4 and weigh about 130. It’s been years since I have smoked, but about three weeks ago I too a few puffs two differnt days. I just took a urin drug test yesterday for work. Should I be worried?

    • You’ll probably be fine. There wouldn’t be much in your system if you only took a couple puffs. Come back and let us know.

  24. Im 5’6 and im 185 pounds. I havent smoked in 12 days. I took a drug test yesturday. I drink alot of cokes, gatorade, etc. but i didnt know untill the day before last that i had a drug test. so the day before my test i consumed alot of water? do i have a chance of passing?

  25. CRANBERRY WATER QUICK FLUSH HONEY VINEGAR

  26. I smoked for the first time on 2/20/13 and now I have a drug test the 25th. It was the first time I have ever smoked and I only got a little buzzed. I weigh 100lbs and have a fast metabolism I also workout 2 to 3 times a week. Is there any tips for me if I cant pass?

  27. I took one hit of weed a little over a month ago. The last time i smoked was years ago. I have a hair test in about 2 months. I regularly bleach my hair. Thoughts?

  28. I smoked about 2-3 weeks ago and I’ve worked out and ran every day since, how long do you think I have before I can take a Blood test for work I have about 2 weeks until I have to take it. Any tips?

  29. I’m 5’8 300+ I haven’t smoked in About 90 days and my job do hair sample do u think I’m clean.

  30. I’m 185pd 6’0 tall was clean for a good 7 months befor I smoked again I smoked heavy for a good month at least 1-3 joints a day. i’ve Been clean at least 3 weeks or a lil less then 3 i kno for sure two weeks. I’ve also been drinking alot of antixidents juice like V-8 an lots of Water tea’s what have you NO POP but red bull eccasionaly. yes ive been on a diet since i’ve stop using pot an also taking niacin but rearly sweated alot but enough at work i now weigh 184 pounds 39 days ago i was at 206. I just took a doller store testing kit an came positive.. Im pulling my hair out because i dont want to be plced back in cook county jail.. plz help me????? I’m preparing for the worst but hoping for the best.. 5 days from noww il be taking a urine test an been chugging lots of tea

    • ^^^^^ And it was the best Pot you can find anywere it deff was not REGGIE…It smelled great an looked amazing…cali bud for sure

  31. I’m 5’6 weigh 130 lbs. I took 3-5 hits of a joint approximately 17 days ago. I’ve just applied for a job which requires a drug test. I have been drinking plenty of fluids… I also eat pretty healthy in general and work out regularly. Do you think I will pass the urine test that I just took today? I’ smoke marijuana very seldomly and don’t have a very high tolerance whatsoever for the stuff. Someone plz give me some feedback. Thank you.

  32. So far it seems like from all the articles I’ve read online, for the infrequent smoker it will take up to 10 days to become undetectable with a urine test… I hope that’s true?

  33. Hey guys. I have a drug test on April 11 2013. that’s about so that’s about 3 weeks away. I’ve been smoking a little bit of weed, maybe 5-6 times but it was only a couple hits, and never more than once a day. Should I be Okay for my drug test on April 11th? Today is March 20th, so it’s about 3 weeks away. Also I heard something thats if its below a certain percent or w/e, so is that possible? its a urine screen

  34. I took my UA test 13 days after I took 2 hits of weed and passed with flying colors before the 2 hits it was 7 months since I smoked

  35. I’m 45 years old, burned for 25 years like a Rastafarian, weigh 250lbs and am 6″0′ tall. I just failed a test at 70 days! FYI…

  36. hey guys i am 6’5 281 lbs. i smoked may 3rd. I have a job interview in a week, should i be worried?

  37. I ate two weed cookies 12 days ago but didnt smoke at all for the month. I drank half a gallon of cranberry juice before, should i be good?

  38. I took about 4 light puffs of marijuana in the within 8 days of a drug test. What can I do to pass my test?

  39. Hey I’m an everyday smoker but need to quit to get this job..I’m 60 kg and work hard…how long would I need to pass a blood drug test..

  40. been smoking 4-5 times per week for over a decade. then dropped it down to 1-2 times per week. how long do I have to be clean to pass a standard employment urine test?

  41. I quit smoking 8 months ago after HEAVY use for 9 years. Will I pass a split urine test. Thanks.

  42. If anyone sees this please help. I have a job offer. There is no set date on when I can take the test. It is up to me to call and make an appointment. I have been a smoke for 6 years. I the past couple of years I only smoke at night to help me fall asleep and to help with my appetite. I weight 123 an im 5’4. I plan to workout daily an drink lots of water an cranberry juice an also take niacin. I don’t want to wait to long to take the test. So im making the apt 2 weeks out. Do I have any chance of passing? I feel I may be over my head. I don’t use the drug for self pleasure but I have insomnia an poor eating habits. And it really helps me to relax and eat more.

  43. Hey guys i’ve been a regular smoker for about 13 years, hitting maybe 3 to 4 spliffs a day,I will be getting a job that requires me to do a full medical. the medical will be in approximately a months time.I have been 42 days smoke free, so by the time of the medical comes around i’d say i will be about 72 days smoke free, I’m 6ft tall about 175 pounds, i walk for more than a hour a day, i drink a lot of water, i don’t have much body fat, will i be thc free when it’s time for my medical? I don’t need any lectures on(i shouldn’t smoke,and that marijuana is bad, please spare me) just professional response please.

  44. I’m 5’9 225lbs, I smoked a lot, three bowls a day, and the good stuff. I stopped on April 18, I move furniture for a living maybe 18 hours a week is heavy psychical activity and the rest it not, took a pee test at a lab (not a panel test) July 1 and failed, 48 parts (or whatever the count system is) was still in my system. I don’t know how much was in when I stopped but its still in me 10 weeks later.

  45. Here i smoked 2 bong hits of some skunk i work in the heat everyday and everyday i go to the gym and sit in the sauna im 6 ft 141ib i passed my test 7 days later u can pass the drug test with sweat keep sweating

  46. I smoke weed everyday a least 3x a day I went tah GNC an brought a bottle of 500mg niacin I took Da pill omw tah take my drug test and I PASSED it…. I had jux smoked Da night before, NIACIN works