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.
  • Peyton yarnell

    I’m 14 and took 2 bong rips on July 3. I’m 5’7 and weigh 115. Am I good for tomorrow’s drug test

  • Dontsmokeweed

    You people have smoked WAY to much! Read the bloody article and it clearly says ‘No definitive answer’…. Morons!

  • Benny

    Ive been clean from smoking Marijuana for 80 days do you guys think im going to be clean i took a drug test two days ago my weight is 250 plz help

  • unknown

    Ok ive been smoking for the past 6 MONTHS heavily.. (loud) stoped smoking for 60 days now took a drug test for a job and FAILED! !! DID YOU HEAR ME 60 DAYS…SO YEA DONT CHANCE IT GET SOME CLEAN URINE AN FEMALES STICK IT N YOUR PUSSY AN MALES TAPE IT TO YOUR THIGH…#REALSHIT!!

    • Marijiwana

      Did you read the article above? Can sometimes take up to 90 days for heavy users. Doesn’t matter if it was only 6 months or even a month.

  • Alex Rodriguez

    If I’ve never really smoked in my life and then at one about let’s say 2 week period was smoking every few days but it’s been about a month since that 2 week period what are my chances for a hair sample ??

  • thomas octobar

    So let’s say I smoked on July 3 and I have a hair drug test on September 30th, would I pass? I got a hair cut for precautions but I’m still super parinoid

    • Nayte

      A hair cut wouldn’t do much to change the result as it is a follicle test and you didn’t cut the follicle.

  • Vero

    I stopped smoking for a month and they drug tested me on July 6 and I smoked the next day but I was gunna get another drug test on the July 20 will I be clean if I drank a lot of water and peed a lot for those 12 days?

  • Vero

    I stopped smoking for a month and they drug tested me on July 6 and I smoked the next day but I was gunna get another drug test on the July 20 will I be clean if I drank a lot of water and peed a lot for those 12 days?

  • anuj

    Hey I have a quick question I smoke last on 2nd April and then I smoked 2 puff at party in mid June and probably I have a hair test on 11th August do you think so I clear it.

  • Tristan Mason

    I’m 5’7 130 and I smoked every day for 7 months one time a day how long will it take for it to be out of my system?

  • Vero

    Would the weed get out of my system in 10 days if I hardly ever smoke?

  • Shay

    I’m freaking out!! I have a drug test tommorow for an amazing job opportunity. I smoked skimpy joint on Saturday(myself) a few hits on Sunday it wasn’t potent but it did give me a mild high. Before then I haven’t smoked in 3 months. I took one of those dollar store drug test on Wednesday and it came up negative. But I’m worried that those aren’t so reliable. I’m female 4’10” 115lbs.

    • Duhhh

      Mmmm read what it says above. Clearly states it

    • izhmash

      ruh roh raggy

  • Celiajay

    I’m 5’10 about 300lb(don’t judge) and I smoke almost everyday a few times a day. I haven’t smoked in a week…how long will it take to get out of my system and any tips to make it get out faster? I have to take a drug test for work.

    • Marijiwanna

      not judging….being the weight you are it would take longer for it to get out of your system. Thc sticks to fat sells. More you have longer it takes. To be safe I would give it a few months. Could only take a month though….drink lots of water everyday and exercise

    • antwanique ross

      U can take some cranberry pills and drink some vinegar and water

  • Grigs

    Hey you guys, I have a question. I’m going to be moving out of state in a little over three weeks, 23 days to be exact, and i’m wondering if that will be enough time to get pot out of my system for a job. I’m pretty small all around (5’3, 115 lbs at most), and the last time I smoked was last night. Granted it was just a pinch at the bottom of a bowl but it still counts! It was an every day thing for me for at least a year, maybe two. But over the past week i’ve smoked maybe three times, small bowls. What do you guys think?

  • greg

    I used to smoke but not a lot. I stopped for about 2 weeks n strated again but only smoked on Wednesday and saturday 2 weeks ago. I drink a lot of water n run everyday n I only weight about 128lbs. Should I be fine one a drug test?

  • anonymous

    I haven’t smoked since March 2013 I took like 4-5 hits the other day I’m 5’4 260ish when will I be able to pass urine test

    • Josh Clemons

      Is that 260 is that mostly muscal or fat???

  • Bubbles

    Has anyone had any experience with Toxin Rid? They have a 10 day cleanse one that I’m thinking about getting but it is $189!! Also I read that Qtabs could be good and they are $10 on amazon. Any insight on these products would be greatly appreciated!

    I haven’t smoked in a month and I failed my home drug kit test today :(. I have two more weeks until I have to take the test.

  • the dude

    Has anyone tried Toxin Rid or Qtabs? one is way more expensive than the other and I’m wondering if anyone has had much luck with them.

  • Eric

    Hey fellow tokers.. Here’s my situation, I am 5’7 I skate and work out almost on a daily..I eat clean foods and eat pretty healthy.. I take supplements such as creatine and vitamins … I am 155lbs.. Around 12%BF.. I only smoked for the summer but I went hard and got fat … I have since lost 10lbs(fat and water weight) in aprox 7 days .. How long until I will be able to pass the test?
    P.s. The strongest thing I took was about 2 weeks ago and it was a 360mg edible

  • Nate

    Does the potency of what your smoking have an effect on the timing?
    Because i smoke SHATTER heavily everyday, would i have to wait longer then someone who only smokes regular chronic heavily everyday?

  • Nate

    Does potency count?
    Would a heavy Shatter smoker have to wait longer than a heavy Chronic smoker?