Jan 052013
 January 5, 2013

Pass Your Test The data used to create this infographic is gathered from research on drug testing methods and the information presented by drug screen manufacturers. Some resources include Redwood ToxicologyCannabis Drug Testing,California NORML. The information presented is only a guide or estimate since drug testing has many variables that can influence a positive or negative outcome.

How Long Does Marijuana Stay in your System? is the most frequently asked question that we receive at HomeHealthTesting.com. While there is no definitive answer, we have presented some guidelines. The only way to really know if you are positive is to test yourself. You can test yourself with a cheap drug test and know if you are positive. Buy a THC urine drug test

How long does THC stay in your system?

The most common drug tests used are urine, saliva and hair. Each test has a different detection time which is important to know. The urine drug test is the most commonly used because it is cheap and has a longer detection time than a saliva test. There are several very important factors that can influence how long THC will be present in your urine:

  • Weight
  • Body Fat
  • Amount Used
  • Frequency of Use

Since these factors will vary greatly for each individual, there are no definitive guidelines to tell you how long you can test positive for THC.

On a Urine Drug Test, THC will appear as a positive within 2-5 hours of use. How long it will still show on a urine drug test is estimated based on frequency of use, but does not take into account the weight and body fat of the marijuana user:

  • One Time User may show positive for 1-6 days
  • Moderate User may show positive for 7-13 days
  • Frequent User may show positive for 15 or more days
  • Heavy User may show positive for 30 or more days
  • Some Heavy Pot Smokers have reported being positive 45-90 days after quitting

On a Saliva Drug Test, THC will test positive within one hour of use, but may only show positive for about 12 hours after last use.

On a Hair Drug Test, THC will show up about 7 days after use and most hair drug tests will test for a 90 day period. However, THC does not always bind to the hair follicle which makes it not always considered an accurate testing method for marijuana use.

The most reliable way to know if you are testing positive for marijuana use is to drug test yourself.

how long does weed stay in your system
By: HomeHealthTesting.com

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About Johnny Green

Johnny Green is a marijuana activist from Oregon. He has a Bachelor's Degree in Public Policy. Follow Johnny Green on Facebook and Twitter. Also, feel free to email any concerns.
  • ken

    yo guys, i haven’t really been smoking lately. i took two hits over a month ago and before that haven’t smoked for about 3 weeks…im thinking of smoking a bowl or two tonight I’m 140 and 5 feet 10 inches. when do ya’ll think ill be clean?

    • katison

      THC can be detected in saliva up to 3 days for people who don’t really smoke. Urine can be up to a month

  • sadstoner

    Hi im 14 I smoked weed everyday 2-3 times a day for the last 6 months I have a drug test happening 2 weeks after stopped the test im taking is from my parents and is not going to a lab or anything so is it possible for me to dilute my pee as much as possible so that the test wont show positive

    • katison

      I honestly doubt that two weeks is enough time , urine test need at least a month
      U can try increasing your water intake by ALOT and try sweating a lot , u can also purchase a urine in home test from Walmart , just make sure its the one for thc

  • damn THC

    I have been smoke free since Jan 3 I have taken gnc 7 day complete cleanse ,antibiotics and pissed dirty 3 times since I have another piss test next monday what do I do.

  • J

    Smoked about 10 days ago, and before that didnt smoke since beginning of january but I have a hair test, is it safe to say im fucked?

    • katison

      Ooooh yeah.
      Hair typically can be detected up to 90days

  • mandy

    The last time I smoked was Jan 13th 2015 and It is now March 3rd. I’m 5’5 159lbs. I have a test next week. do you think I can pass?

    • Nana Booboo

      No. Hahaha

    • katison

      How will u getting be tested? Go buy a in home test from Walmart they have the urine ones try increasing your water intake by ALOT and do anything to get urself sweating it out
      If its a swab test (saliva) u will pass

    • katison

      I’d go buy a test from Walmart

  • john

    Hi. I did not smoke since Jan 1st and it is march 3rd. I just tested myself and I am still positive for 20ng / ml. I smoked everyday I am about 5’7 165lbs. Why is this taking soo long. I am stressed. My first time it took 12 days but I am bout 20 lbs heavier

    • katison

      How are you testing yourself?
      Saliva or urine?

      I’m the same boat mate.

      • john

        I am testing on a.urine stick. For 20ng / ml. I don’t know what to do. My u nine test is on monday. It will be 64 days clean

        • katison

          U can try increasing your water intake and sweating a lot. 64 days huh?.. I woulda thought you’d be clean by now

          • john

            I diluted myself for the past few days by drinking lots of water and taking a b vitamin pill to keep.my pee yellow. I did three self tests and it says I’m negative for less than 20 ng/ ml . I just hope I pass the real thing. I also just tryed peeing in the morning without flushing myself and I’m still dirty. Getting close to 70 days now

          • katison

            Let me know how it goes!!

        • katison

          Idk if my other post got posted or not but I wanted to correct it.
          My buddy actually had his friend (who never smokes) pee in a condom and he strapped it between his legs to keep it warm
          Try increasing water Intake , drink it all day everyday and start doing anything to sweat.
          U can purchase a in home urine test from Walmart.

          • john

            Yeah I flushed myself for the last few days and did 3 self tests that test for 20ng/ ml and it was negative. I also took a b vitamin pill to.make.my urine yellow. Hope I passed the real thing today or its game over for me

  • Jim

    My PO stopped setting monthly dates for me to get tested and now she’s just coming by my house and not giving me a thc test, so I figured I could smoke a g for 5 days straight. how long would it take to clear with taking cranberry bills water and exercise?

  • Jim

    My PO stopped setting monthly dates for thc tests in the past two months and just coming by the house and checking up, so I figured I could smoke a g within 5 straight days. how long could it be in my system with taking cranberry pills, water, and exercise? I’m guessing within 25-30days?

  • Marge

    i have smoked every day for about a month and a half. I’m 5’5, 135 lbs, exercise twice a week and will be 37 days clean before my drug test. Do you think I can pass?

    • katison

      Buy a urine test from Walmart to check and try working out more just for the timeframe u are trying to get the THC out , increase water Intake

  • Holly

    I have to take a urine test in order to offically get the job. I smoked a gram daily for about a year. I quit January 13th, 2015 and I plan on taking the test on Monday – March 9th. I’m a female that weights 160 lbs and I’m 5 feet, 5 inches tall. Any clue to if I’ll pass?

  • Lauren

    I am 130 and 5’3. I was a regular smoker for 6 years. Maybe 2 to 3 hits a day. I stopped smoking and have been clean for almost 3 months now. But two days ago I smoked smoke some wax. Only 3-4 hits out of a Vap pen. How long will this be in my system? Can I increase exercise and water intake to flush my system?

    • katison

      Why even quit then? Lol its pretty pointless to quit and then hit wax.
      Wax stays longer.

      • Lauren

        Honest mistake as a human. It was a birthday party. I was hoping for insight than to be insulted. But thank you for your input

        • katison

          It was a honest question.
          I apologize.
          You have to stay strong for your required timeframe. I just see it as “you coulda been blazing that whole time” if u were jus guna hit it again anyway.
          I truly apologize Lauren, it was an honest question and I lol at everything. Sorry.

          And to add, I have read that it takes about 30-60 days for your amount of usage.
          -thus depending on your metabolism, and body type
          Increase your water intake by ALOT And do anything to get yourself sweating it all out.
          U can also purchase a in home urine test from Walmart.

          Again, I apologize for my stupid comment. Rough morning

          • Lauren

            You have nothing to be sorry about. We all have bad days. But I truly appreciate your input. Quitting was the hardest decision of my life and I wish I never made the decision to hit that Vap pen.
            I do thank you again for responding and being so kind. I was in a rough state of mind when I responded to your comment. I should be sorry.

          • katison

            No worries. ☺

            And try not to be so hard on yourself.
            Weed is just simply amazing… I sometimes catch myself saying “why do I gotta love it the way I do”
            Its a touchy relationship but we know aside from it not being legal it really shouldn’t be so frowned upon.
            All the best mate! ✌


    Hi everyone,,,I smoke weed for the first time in my life before two weeks and before 4 days but not much just a little bit,do you think I pass tomorrow the drug test??

  • John Vitrano

    So I had two small puffs a month ago. The board of nursing needs to drug test me. Will it show in my hair? Can I cut it?

  • jj

    I’ve smoked 5 times in my life, all 5 happening between Christmas and March 1. I have a drug test close to march 11. I’m a 5’9.5″ male and I weigh 195 pounds. I lift weights, do cardio, or play a sport everyday. Will I pass a urine test? Also, if not. Can drinking a lot of water do the trick. Thank you for your help.

  • Jake wehde

    I’m 19 and smoked about an eighth two weeks ago. I have a drug test for probation on the 19th. Will I be fine for the test?

  • Cul

    I haven’t smoked pot in over 10 years….. In January I had a moment of weakness and took one small hit. I have to take a HFT next Monday. Does anyone think I’ll pass without the whole hair detox process?

    • Jill

      I’m sure you’re fine. One hit is hardly enough THC to pop a positive anyway.

    • Puffin505

      You’re golden. I think you’re okay

  • rd1

    I haven’t smoked in 3 months.. 3 months!! When I quit I was 6 ft 200 pounds even. 3 months later I am 6 ft 169 pounds… I’ve lost 30 pounds by exercising my balls off and eating as healthy as one can eat.. this is ridiculous man I’m so bummed.. anyone have some further advice on what I can do? I’m doing this naturally so don’t tell me any pills I can take. All I drink is water and I eat under 1500 calories a day if not 1000.

  • Bella

    I haven’t smoked in two weeks if i took a couple hits and have a drug test in a week exactly would I be clean..? I drink tons of water and cranberry juice and only way 104 pounds and I’m 4 ’10

  • Dianel

    I smoke for for days straight but only a half o it each time now I have to go to parole on the 18th March is there any I can do to test negative

  • Alex

    I’ve been clean 116 days and yet I still have doubts about passing should I be concerned

    • Jay

      hell no your strait bro! dont sweat it! but of often did you use?

    • Puffin505

      Took me near 180 days, I smoked 5-10 a day for years and weight about 190lbs.

  • jademary

    I took three hits oft a blunt a week ago and I weigh 185 and 5’2. How long will it stay in my system? I haven’t smoked since January before that.

  • Puffin505

    Longest I stayed dirty for THC was nearly 3 months. I smoked 5-10 times per day, weight about 190lbs. Once clean, I can smoke for 1 day and it’ll take a little under a week for me to go clean. If I smoke 2 times in a week, it’ll take me near 10 days to be clean. If I smoke more, time in the system just increases. Gotta’ regulate. Cheers

    • Puffin505

      For clarification, I can smoke for a 24 hour period (after being clean) and pee clean in under a week. If I smoke 2 times in one week, different days, it’ll take about 10 days to go clean. The more I smoke each week, separate days, the long it takes. If I smoke 5 or more times in one week, guaranteed I’ll piss dirty for a month.

      • Puffin505

        PS I’m 6 feet tall. Cheers

  • brownsuga

    I usually hit the blunt once a day. I hang smoked so far in three days and I’m not going to until ..I’m not sure of when I’ll have to take a drug test but I know it’s coming within the next week or so. I’ve been drinking a lot of water. Do you think I’ll be ok?

  • Ramfan

    I smoke like once every 2 weeks and just smoked on Sunday, how long do you think it’ll take for it to get out of my system?

  • newme

    Ive been clean about 73 days have to take a hair test tomm for GM im nervous i wonder am i clean.. Im 5’5 123pds

    • Cul

      I think it depends on the usage before you stopped. HFT goes back 90 days so if your usage is heavy it may still show up. If your hair grows fast maybe it can be cut out. I’m i. The same boat I test Monday and it will have been like 76 days. Let us know how it works out.

  • Jb65

    I smoked a few hits of a pax Saturday and was tested today , yesterday I drank as much water as I possibly could and today before the test I drank a bunch of Gatorade and water and loaded up on creatine, what are the chances I test negative?

    • TheRealAlTerego

      It depends on how frequently you smoked before Sat., what you body fat is like, and metabolism. Drinking water and Gatorade will only dilute your sample, but I believe that does decrease the amount of THC metabolites in your sample, just not by much. If that was the only time in the past month, and you are skinny with a crazy metabolism, you might be okay. That’s a big maybe though because 4 days is really cutting it close. Good luck!

  • Cassie

    I smoked a little on thursday and got tested today (Wednesday). I don’t smoke very frequently and i am 5’2 and 112lbs. Do you think the results will come out positive? I am really scared, this test is for a job that I really want.

    • TheRealAlTerego

      First, if you really wanted a job that requires you to piss clean… you shouldn’t have smoked in the first place. Self discipline is the best thing you can learn when it comes to weed. You have to be able to say no when it is important to say no and say yes when it’s the right time to smoke. I’ll get off the soapbox, but trust me when I tell you that this is some of the best advice you will ever hear. As for whether you are going to pass or fail, I cannot predict the future, but depending on how often you really smoke and how much you smoked 6 days ago, I think you should be fine. If you have smoked 10 times in the past 2 weeks (6 days of which were clean), I would say you probably failed. It really depends… Good luck!