Jan 052013
 January 5, 2013

marijuana weed drug testing system saliva hair urineThe 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

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.
  • FrannieFran

    Oh l also forgot to add that he has a fast metabolism and all he ate was junk. Literally, cheeseburgers, cheesesteaks, pizza, chips etc.. He never ate healthy and he never gained weight. He’s been 6’1 180-190 for the last 10+ years. So the high metabolism didn’t help him out either!!

  • Nicolas Elwood

    I’m 6 ft around 200 lbs and i have a drug test on Monday. Ive smoked today and i usually smoke around 2-3 bowls/day. Would i be able to get it out of my system by then if I used cranberry juice or a detox pill? Plz help PS: I exercise everyday for around an hour and a half.

  • ganjaman

    if your worried about passing a drug test buy urineluck, its fake piss, works everytime.

  • Toxic

    I’m 5″8 weigh 134 and I have a drug test in 12 days if I smoke today will I still come out postive

  • mv15

    I’m 5’5 and weigh about 130 and I’m very active, how long will it stay in my system?

  • helpplease

    hi everyone, i really need help I’m extremely frustrated, i don’t have a dead line but i was offered a once in a life time 150k a year job on june 23rd, that was also my last blunt, i would burn about 3grams a day for about 11 months straight, i was related to the only “dro’ dealer in my town rather than brick weed, I’m 5’10 221lbs and about a year ago i was weight training, but that came to a stop due to a back injury, my question is what else can i do? its been 2 months iv tried pickle juice cranberry palo azul and running in a sweat suit, i tested at my local lab 3 days ago and still tested positive, this job won’t wait for me any longer, i will no longer smoke iv had my fun with bud, time to grow up for me. what else can i do guys? id greatly appreciate the feedbackk! Please & thank you!

    • Anon

      Go to your local smoke shop and look for a synthetic urine kit. They usually run about 80 to 100 and it should be a bag on a belt per filled with synthetic urine.
      It is usually called a field kit or synthetix. Be sure to follow the instructions to the letter. Which entails heating up the bag in a microwave for 30sec to a min then affixing a heat patch which will keep the sample at the correct body temp range. Also there should be a temp strip that will show a color by the number signifying the temp of the sample. It should be between 94 to 100 degrees. Closer to the 100 the better because once the sample is being poured it’s temp will decrease once it hits the air.
      http://www.synthetix5.com/shop/synthetix5-belt-kit/. This is a site for the one I used recently

      • helpplease

        i dont wanna use synthetic the company does random drug tests, an employee was drug tested came out negative, 3 days later he was randomly tested and came out positive for cocaine, and lost his job, he didn’t have any chance to use any sort of synthetics he was pulled from his shift to test, but thank you i appreciate the feedback!(:

    • Huh?

      Go to GNC and get QCARBO32. it runs about $50 but I’ve used this shit on various occasions and I GUARANTEE 100% that it works :-) hope you get the job!

      • helpplease

        will it permanently cleanse me or is it just like a masking type of thing?

  • Clive

    Hi everyone, I smoke about 8 hits today and will have a urine test next week. I only smoked 2 times in my whole life. Is there any chance that I will test positive?

  • richard cameru

    Hi I am 5’1 121lbs I smoked for a week straight once a day (3-4hits) for the first time ever the last week of July & I haven’t smoked since. I have a test sept 4 should I be worried??? Please help?

    • mr pothead

      No , drink pickel and cranberry juice

  • tee

    Hello, im about 5’7 130’and I quit smoking 37 days ago. I was smoking 1blunt a day & maybe 3 on sat/sun. I walk about 1 hour + a day as well as run. Do to not having a car. I feel likeI have a high metabolism I can’t gain a pound. My test was yesterday I always drink about 3-4 bottles of water a day. Do you think I will pass?

  • Druggy mcdrugdrug

    Hello I’m high and about 200′.
    Haha sooo many paranoid stoners failing drug tests

  • Dan

    Whats up guys, so I’m very thin (6’3 150) and workout about 2 hours everyday because i play water polo. I took a 0.25 gram dab 8 days ago and hadnt done anything else for 3 weeks. I just started smoking earlier this summer. My drug test is gonna be next friday so exactly 14 days after my dab. Will i pass? Paranoid as hell. Thanks

  • J

    I smoke 5-6 joints in a week . I have a drug test . What time before the test should i stop smoking ? How many days should i quit before ?

  • K

    So I just smoked last night and I might have a drug test coming up in 2 days I’m 5’2 135 pounds should I be worried?

    • gl bro

      There is a trick that i use and other friends have as well and its worked for them. An hour or so before your test chug water then pee then chug water then pee again, repeat this process about 5 times then take the test you will pee clear and pass. I’ve done it smoking a blunt 2 days before test and passed. Well good luck.

  • smokealot

    Damn just tested and been clean for 2 months and still dirty for thc this sucks.

  • Ghanjababe

    41 days and tested positive.


      That just made me mad…I hope your

  • Ghanjababe

    I’m 5’6 female. Around 125 lbs. I haven’t smoked in 6 weeks. Still tested dirty. I was a heavy user. Everyday, multiple times a day, for about 2 years. Don’t exercise too much and didn’t try any methods to test clean. Hoping for a clean one next go-round.

  • memems

    hey, so i used to have low potent(usually dry but can’t complain since this is all i have access to) weed stash that usually lasts for 3 weeks to a month, then have 1 week-3 weeks break. i eat healthy, drink lots of water regularly (around 2-3 liters a day) and do yoga religiously. i’m taking a drug test in more than 12 hours from now. will i test positive? i have stopped smoking for 33 days. i’m 5’1 weigh around 95 lbs and boney. please reply. a little anxious


    Im 6’0 228 and been smoking for 20yrs everyday…I can take the urine test whenever I’m ready, I’ve been hearing 90 days?…I’m about ready to just quit quiting..I’m not fat, maybe just a beer gut lol…any suggestions would be awesome

  • lil mommy

    I smoked almost 2 weeks ago and have a urine test tomorrow..I want to pass so I get this job I’m 5′ 5″ and weigh about 135lbs I didn’t smoke all the time or very much..any suggestions

  • Hector.s

    I’m 19 weigh 155 lost a lot of weight recently. I quit smoking August 17 and I have a urine test on September 25 I’ve been going to the gym running a mile an a half then would work out after… I also sit in the Sauna which is a hot ass room that makes you sweat… I eat normal I’m a male an I’ve also forgot to mention I smoked for a good 5 years before everyday. But i really want to test clean this is a big step in my life. Should I hold off on the job for a while longer. Don’t forget I go to the gym 5-6 times a week. I use to weight 175 a month an a half ago lost 20 pounds please please please answer me back please!!!

    • Hector.s


    • lil mommy

      I don’t think you really have anything to worry about make sure you drink a lot of water if you want to be sure go to walmart and get a detox kit I used one by jillian michaels you have to take the pills for a week but it worked for me..good luck!

  • jade

    I smoke about five cones this mounth and iam 127 kgs how long will it stay in my system as iam having druy test in the next week or two