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.
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  • Tyler Fey (Hippyvan)

    I have a test on 1/4/16, I have been a constant smoke daily for over 3 years. I smoke mainly BHO with a 75%+ THC. What’s the estimated length of time It will be in my system? I am 160, 5″8′ and just started cardio this morning. I have stopped smoking completely.

    Thanks in advance.

    • Mike

      You should probably quit all together I’m thinking a good 30 days after you quit

  • Mike

    So I don’t smoke at all but 20 days ago (end of October) I took one dab hit. I’m 6′ about 200lbs. I just had to take a random drug test. Any idea if I will pass!???

  • Mike

    So I have not smoked for 6 months but 20 days ago I took one dab hit. I had a random test today. Do you think I’ll pass?? I’m 6 foot and about 200 lbs. please reply thx

    • 222


  • john

    I have not smoked since Halloween in another 3 weeks I need a drug test urine and hair not too worried about the urine but the hair worries any suggestions ideas that work

  • Patrick

    All of you are fucked, its too late, gameover.! no going back.!….you’re failing your tests, might as well keep smoking cause in 24 hours after your tests…bye, don’t drop the soap haha

    • Mike


  • Christina

    I have a pre-employment urine drug test (possibly… application form says they “may” screen me) coming up, and I don’t wanna take any chances. Currently employed with a company that doesn’t test but I hate my job. Only found out about the possible drug screen on Thursday, and haven’t smoked since. I’d say I’m probably a heavy user, smoking near daily and going through an ounce a month. I’m 5’2″ 110, and I go to the gym 4-5 days a week. Lets say my test is in a month. What are my chances?

  • Mike

    People here are asking valid questions regarding their concerns to seek guidance and piece of mind. Your input is uncalled for and ignorant so back and crawl under the rock you came from loser insect!