Jan 052013
 

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

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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.
  • Ukelele

    Finally! I’ve been trying to find an answer to this question for ages and nobody could give me anything but vague estimates. Thank you for this! :)

  • Joe

    Americans will always give up their freedoms for the illusion of safety – George Carlin
    Drug testing is a joke & a violation of your rights. First off most hard drugs only stay in your system for a couple days even a hardcore crackhead can clean himself up in a few days. Weed is the only drug that stays in the system for a long time so it’s basically a witch hunt against weed. Funny because weed is not only the safest drug it is also prescribed in a lot of cases. It’s offensive that someone who is dealing with something like cancer could lose their job because they are using weed to help combat the symptoms of the disease. That is sickening let these morons who are testing get cancer & see how quick they change their opinions. You should be judged on your performance on the job & if your a good employee why should these corporate assholes have their noses in your business? They are looking at your bodily fluids! Is nothing sacred anymore? Also for those that say well if you don’t smoke weed you have nothing to worry about. Wrong. These companies are paid by the companies who hired them & there are no guidelines to what they can look for if you are on anti depressants or you are diabetic exc…. They can also see that & that can influence their decision on whether they hire you. Today weed tomorrow alcohol next day they’ll test you for eating to much sugar. Sad

    • Frank

      that’s so true good point ^^

    • Eric

      It’s a good point, but it is already considered unprofessional and will get you fired to work drunk. Same goes for being high. Companies don’t care about the law or your performance reviews. It’s the unpredictability of your actions under the influence. That and it’s the law so its an easy out to fire someone they don’t like.

    • KapKappn Kronix

      Drug tests are not a violation of freedoms bc you voluntarily submit to drug tests. I’m assuming your referring to the 4th amendment which is a contract between the people and the government…not between employee and employer. If you are speaking of the government testing citizens you are partially right…granted the “search and seizure” is unwarranted. In the case of the workforce: most employers have in employee contracts the policy of drug tests and usually a dismissal if there is a refusal to test or a positive result is found. You don’t have to sign the contract, but once signed it is a legal document and they may dismiss you per the contract.

  • http://www.facebook.com/damagoman Damagoman Mago

    even if they are 3 feet long and 8 years old or better? my hair (smrk)

  • http://www.facebook.com/people/David-Allen/100000329117819 David Allen

    drug testing hurts society by causing people to use hard drugs which are gone in 2-3 days after use where marijuana stays longer. This forces people to use the hard drugs. Drug testing makes money by stealing your right to privacy rights and you testify against yourself. (Timothy Leary defense)

  • http://profiles.google.com/walter.guyll Walter Guyll

    The best test is to desiccate the subject, grind to a fine powder and apply spectral analysis.

  • VeroCray

    I smoked 2 small hits from a small pipe and I’m 4’11 and weigh 139, but i smoked it 3 weeeks ago, will it show up in a urine test?

    • jim

      you should be fine if you are worried drink lots of water today not the day of the test (some test will show diluted) and mabe a niacin just to burn off any small fat cells that might have held on … hpe this helps … good luck!

  • Michelle

    I havent smoked pot in over a year, if I take 1 hit, whats your guess at how long it will take to be gone…im female, 5’8″ & 200 lbs

    • joey

      you’re fat

      • Joey’s audience

        Ohhh Joey you’re a dick but I laughed anyways

      • d

        Your such an ignorant ass

        • latinalover.

          i took 6 hits and have a drug test on mondaay . this is my first time smoking in over 7 months . . will i be okay ??

      • smitty

        Funny – I’m 200 lbs and 5’10 and I’m FAR from fat you fucking tool….in fact I’m pretty damn hot I hear. So maybe keep your ignorant thoughts and comments like that to yourself. She didn’t ask if you thought she was fat. Grow up.

        • Rath

          If you’re 5′ 10″ and 200 lbs. and people are calling you hot, then you’re either a) a jacked man who hits the gym or b) There is no b.

          Any woman that’s 5′ 8″ and 200 lbs needs to put down the pot and buy some Slim-Fast shakes instead and go raid the treadmill. Sorry to bust up in here with the truth and all.

  • Droc1028

    I last smoked 50 days ago and just took a drug test today will I pass

  • 420

    I was a heavy smoker everyday for years im 5’11 175 and my piss was clean in30 days and dat was a labratory test for probation

  • http://www.facebook.com/jlipman Jason Lipman

    This guy Joey is a true Jack. And if you read his crap you’ll find he’s also a Dick. Thats alot of bullshit to answer a cool chick by saying she’s fat. I will let all bloggers know too you suck dick!

  • Tiffany

    i smoked 3 weeks ago, over the course of two months consumed about 3 to 4 grams max. Not much in my opinion. Im 5 feet tall weigh about 145pounds. i have a drug test tomorrowwill it still show up?

    • GhettO1stamendment

      Tough call depends on a lot of factors- metabolism so on, run to the pharmacy grab a THC DIY kit “20-bucks” and you will find out in a couple of min.

      • tiffany

        fuck

        • craker

          i havent smoked in over a year and on accident i took a really small hit i dident hold it in i have a hair follicle in two weeks will i pass

  • Tim

    I’m 5’8” and weight 130 pounds. I have smoked every day for the past 2 weeks. Will I pass my drug test about 3 weeks from now?

    • mac999

      prob not i smoked everyday 10 times a day been clean now 30 days and still failing :( need to pass in 2 days time….looking bad.

    • Kappn Kronix

      Idk what mac999 was smoking…but I have your build 5’8″ 130. I smoked 5-6 days/week for the past 4 months. I tested negative twice after the 7 & 8 day of abstinence. I’m currently at 3 weeks and army recruiter pre-UDS for MEPS…still clean. Fat burning/high metabolism is key to release THC metabolites out of fat cells, into the bloodstream, and excreted through stools and urine.

  • mike

    I’m due to start a job with a major transport company in may they do the hair test I last smoked late October early November will it still show up in my hair?

  • og

    I smoked a joint and I got a drug test in two days for saliva will I pass??

  • greeneyes21

    I four hits of a blunt last Friday night and I have a drug test tomorrow morning. I havent smoked in 2yrs. Im 5’4 and 158 lbs. Do you all think I will pass tomorrow or should I just go ahead and start looking for another job?!

  • Sheridan Taylor

    I took 4hits of a blunt last Friday evening…I was told today that I have to take a drug test tomorrow morning. I haven’t smoked in 3 years…I’m 5’4 and 156 lbs. Do you all think I will pass or should I just start looking for another job now?? PLEASE RESPOND AND GIVE ME YOUR OPINION… THANK YOU!!

    • Used to smoke

      Tell us what happened :-)

    • Kiso

      What was the outcome?

  • concerned

    I’m a very active 21 year old male, do frequent weight training 5’9 145lbs, approx 10% body fat. I smoke about a bowl or two every night. What are the estimations of how long it will take to get out of my system? Thanks.

  • tyshell

    I just took a oral drug test for kroger.I’m a heavy weed smoker but I wash my mouth out with peroxide and altoid and mouthwash than brush.you think I’ll pass?

  • Tamar

    I havent smoked pot in 4 months nd I just started smoking pot a week ago nd i just found out i have to take a drug test this week. Im 5’1 nd weigh 120. Will it show up in a urine test?

  • Leila

    It’s been 4 weeks since I last smoked, and I’m still testing positive. I’m a 5’6″, 125 pound active female with a fast metabolism and little body fat. I was, however, a heavy smoker, so I’m interested to see if it actually takes 90 days to test clean.

  • Uma

    Last Day I smoked was March 19th. I had smOked approximately one joint every day from Feb 14th To March 19th. 5’8″ 200lbs. If in testes tomorrow should I be positive?

  • shylowe

    can the medication protonix cause a positive u/a for TCH ?

    • Bariumzone

      No

  • genevia

    I am 17 and about 200 pounds i took about 2hits and barely inhaled and.i took a spit drug test 2 weeks after will i fail?

  • disqus_pKW3v5o2Os

    I took two draws of a joint a week ago today, and havnt smoked for over 3 months before this. I’m about 164cms and weigh about 68kgs. I do go to the gym Atleast once a week. Will I be clear to do a medical drug test in a week?

    • Eric

      We don’t understand the metric system, so you should be fine.

  • http://www.facebook.com/diamond.l.branch Diamond Luvsherbabyboy Branch

    I smoked on the 24 of march it’s now April 10th and I smoked like three times a day but I smoke in groups so would that lower the chances? And what do you think the chances are that I pass a drug test today? I’m 5ft and 125

  • Sasha

    I hit two puffs off a blunt four days ago. I was clean from pot for 60 days prior to smoking. I have a drug test tomorrow which will make my 5th day since smoking. Will I pass

    • ben

      It really depends on what kind of test you have. If it’s saliva your for sure fine. As for urine I would say you have a pretty good chance of passing, but there are many variables (body weight, metabolism, prior use of cannabis) Since you were clean for awhile 2 puffs probably won’t cause detectable thc levels in your body, just make sure you get your mid stream piss in the cup.

  • Kingrocker77

    I’m a big guy (5,6 and 250 lbs), i’ve been losing weight by weightlifting (dramatically uping my metabolism). While the size of everything has gone down (gutwise n other areas i carry fat), i still have a long way to go. if i were to try it one time,how long do u think it would be in my system?
    Thank You

    • DavidTheExpert

      One time? Not very long. Maybe a week at most. You’d probably be good after about 3 days. People who smoke regularly are the ones where it is detectable for longer.

  • bobbyg

    Ok urine, saliva, and hair, but not blood. How long does tic stay in blood?

  • Eric

    Smoked a gram with my friend Tuesday night. Smoked 4 times that night and once in the morning on Wednesday. I was supposed to take a drug test today (3 days later) but I put it off until sometime next week. I’m going to take it Thursday morning, so that’s 8 days later — according to this I should be fine. To sum it up…

    Smoked very little 8 days prior to test, not for 3 months before that.
    130 pounds – 5’11″ (Skin and bones working in my favor for once)

    I’ll post back with the outcome, but what does everyone thing how long?

    • Brad

      Even though you don’t smoke often, that smoking you did do might still be enough to get a positive on a test. You can always try one of those detox drinks, but another suggestion to save yourself some money since those drinks are pretty expensive is to buy some cranberry juice and a bottle of vitamin b-12. (assuming that its a urine test) A couple of hours or so before you plan on taking the test, take a few pills and drink either two liters of cranberry juice or one liter of cranberry juice and one liter of water. The cranberry juice will dilute your system for a few hours, a number of these testing sites would notice that and may make you retake it at a future date, which is where the vitamin b-12 pills come into play, they will put the color back in your urine, so it will appear normal when its in fact diluted. I hope this helps ya.

  • Cheer

    I took two small hits about a week ago & i ddnt het high… My cheer place might do drug tests which would be about 2 or more weeks after . Im 5’1 & weigh 126 … Would i fail…?

  • Shank

    I’m 5’6 and smoked 2 hits out of a pipe 4 days ago. This is my 2nd time smoking and the first time was 6 months ago. I have a drug test in 4 days will i be ok?

    • Noah

      You should be okay, but follow advice from others about drinking lots of water, possibly taking that Niacin shit and you’ll be fine. The graph seems to indicate that 1st time users who are of good fitness will be clean in 1-2 days.

  • California John

    California Man here, I had a medical cannabis card that expired December 2012 and I stopped smoking, was under a doctors care for this and replaced the pot with a anxiety pill adivan, and was injured due to a company manufactured tool and had to take a urine test. Well it’s been 5 months and the urine test for marijuana cam back POSITIVE!! I smoked about 1.5oz a month for many years and my doctor said it could stay 6 months to a year because of the amount I used and the quality. Is there any legal recourse that I can take because the Company never gave a pre employment drug screen and the equipment I was using that the Company designed failed causing sever injury to my rib cage. I was terminated today…

  • Klove

    Long time smoker cleaned up took an at home test and it was clean. It’s been well over a month since that. I smoked 2 pinch hits 9 days ago and 2 more 5 days ago. I weigh about 185 and I 5’6″. I quit cause I was waitin to get promoted and was told it wasn’t going to happen for awhile now there is a good possibility that it is. Worried that I won’t pass the urine test now!

  • heyyyyy

    my hubby and I were heavy smokers for about 5 yrs but recently had to quit for random drug testing, We quit maybe 2 1/2 weeks ago and have been taking niacin like its candy to try and get clean fast. We arent sure as to how long it will take for us to get clean which is scary because we could be tested any day now! I weigh 103 and am 5’4″ and my hubby is about 6′ weighing 150 lbs. Do you think we will be clean soon?

  • Freeme

    Smoked on a Saturday about 4 hits drug test on a wensday, haven’t smoked in 10 yrs will I pass a urine test?

    • Freeme

      Also I took a at home test it was negative.

  • checota

    I have something to add to that . My friend is a heavy user and when he has an appointment he will smoke until bedtime . The next morning soon as he wakes he starts drinking coffee then water non stop. He passes the test every time .

  • thisisbullshit

    I took a drug test last month and it was 103… took drug test this month and it was 116. how in the hell does that happen? havent smoked in three months…

  • RPASS

    I STOPPED SMOKING 8-2010 AND I WAS STILL SHOWING TRACES OF IT IN MY SYSTEM 8 MONTHS LATER !GRANTED I SMOKED FOR OVER 10 STRAIGHT YEARS EVERY DAY ALL DAY I WOULD GO THROUGH 1 TO 2 OZ A WEEK . I WASN’T FAT AT ALL , BUT I DO HAVE A SLOW METABOLISM . I GET TESTED RIGHT IN DR’S OFFICE , & THEN IT IS SENT TO A LAB FOR FURTHER TESTING. AFTER ALMOST TEN MONTHS I FINALLY DIDN’T SHOW ANY AMOUNT , AFTER ALL THIS TIME , I BROKE DOWN AND SMOKED AFTER ALMOST 2 YEARS OF BEING CLEAN A LITTLE BIT IN OCTOBER AND ,& FEW TIMES IN NOV , DEC, & ONCE IN JANUARY I WENT TO THE DOCTORS OFFICE IN JANUARY AND DIDN’T PASS (NO SURPRISE) BUT BY MARCH WHEN I WENT BACK THERE WAS STILL TRACE AMOUNTS SHOWING UP ? I COULDN’T BELIEVE IT , DR SAID VERY LIGHT AMOUNTS SHOWED UP . I SMOKED ON TWICE IN THE LAST 2 MONTHS AND THAT WAS TWO SINGLES BUT I AM ON MEDS THAT HAVE MADE ME GAIN WEIGHT NOW SO DOES ANYONE KNOW HOW I MIGHT PASS MY TEST TOMORROW MORNING I NEED MY RX’S TO SHOW UP JUST NOT THC ANY IDEAS OTHER THAN DIURETICS AND WATER SINCE I ACTUALLY HAVE FAT TO STORE IT NOW , BUT I HAVEN’T SMOKED THAT MUCH. IT ISN’T LIKE A JOB TEST I KNOW I COULD PASS THAT BECAUSE YOUR ALLOWED SO MUCH I ON THE OTHER HAND I AM NOT WITH MEDS THAT I TAKE THEY JUST WANT TO MAKE DOUBLE SURE I AM NOT DOING ANYTHING OTHER THAN PRESCRIBED ANY IDEAS ON HOW I CAN PASS IT ,& STILL NOT FLUSH MY OWN MEDS OUT OF MY SYSTEM OTHER THAN WATER WITH 8 HRS TO GO BEFORE TEST I AM TRYING TO STUDY BUT DUE TO MY HISTORY I DON’T WHAT TO DO OTHER THAN DOWN LOTS OF WATER . ANY IDEAS PLEASE???????

  • mira123

    Will I pass my Silvia test? Only smoked once 20 days ago?!?!?!?!?!?! Place help!!!!!!!!

    • pokahontis

      HELLLL YEA! You’ll pass with a breeze. You have nothing at all to worry about!

  • ryan tran

    i vaped about a week ago, and i rarely blaze, i have a test coming up tomorrow and i was wondering, will i pass???

    • ryan

      6 days ago to be exact, will consider it 7 days in 9 hours

  • Tiffani

    I hit a joint 3 times every 3 months…I hit 3 times 20 days ago,am I clean? Have a random test coming in a few days!

  • green

    I smoked a skimpy blunt of loud and two small roaches about two weeks ago. I get pee tested in 13 days. I weigh 135, 5″1 and drink lots of water and take two cranberry pills a day. I’m also getting sonnes #7 and its a dip test. Will i be okay?

  • thatguy1234

    I took 4 small hits off a blunt on wed around noon and didn’t hold it long. I had a saliva test today (saturday). Do you think I passed? I also scrubbed the side of my gum until it was raw. drank 3 cups of water the night before and a bottle of water 10 minutes before the test. i also put cling wrap on the side of my gum where the test goes during the test.

  • plmh

    I was wonderin i havebeen clean a mth…screwef up took 2 hits today may have to take urine test 2morrow…any chance ill b clean!??

    • efjfdjddfeggfv43

      did you pass?

  • Tyler

    I smoked exactly 2 weeks ago still have to make my appt for test I smoked about 5 grams a week for around 2 months. I’m 5’8 230 lbs not too fat played college football and was a fullback giving you an idea of my body fat. When should I be clean? Please help

  • Crispy

    I smoked pot for the first time on may 11 (never before that and never after) and I went for a test today (May 29) so almost after 18 days. I took all the precautions assuming its a urine test but unfortunately they took the hair samples. I weigh 190 p and 5’8 tall. Will the test be negative?

  • Ann Barnett

    My son smoked almost every day for the last 8 months. Quit 25 days ago, he is 5’11″ and weighs about 140lb. What are the chances he will test negative?

  • Mike

    I’ve been a heavy smoker for more than 20+ years and I’ve decided to quit so I have a better chance of getting a job as many test now. I quit 3 weeks ago and I’m 5’7 and 150 lbs at age 51…How long, at the most, should I expect it to show up in my system?

    • nf1del

      I’ve been clean for over 8 weeks and am still dropping dirty.

  • jk69

    I smoked for about 6 days and maybe half a gram to a gram a day I was clean for a month prior, I’m 5’11″ and 180lbs, I have a probabtion ua in 24 days and I’m on my second day of being clean should I pass!

  • Chad

    Mike I stopped smoking 22 days ago I was a 8th a day smoker maybe a little more.. In those 22 day I smoke twice only a bowel each time I’m 6″5 240 pounds any idea one when I’ll be clean or how to try and clean up in a week??